94Explorer:Fuel Pump runs runs run& cranks -no start

have been through the entire fuel system....... except injectors.

New fuel pressure reulator - easy
New fuel filter - easy
New fuel pump - bitch & 1/2 but warrentied no cost just 1 afternoon
work.
New/swap solinoids in fuse box - no brainer -
New inertia switch - easy

Ok?

It wont start some times when cold. Cranks over like a top
fuel pump runs & runs & runs till I turn off key.
it never stops, like its supposed to afer 2 seconds causing the no
start condition.

When it does finally stop, maybe 30secs or upto a couple minutes at
times,
engine fires right up! runs great! but - see below:
When warm no problem at all- FP runs for 2 sec & stops, engine starts.
even after a few hours of sitting - seems like an over night time
frame will bring it on.


after running, engines idles smooth has good throtle response,
no check engine light.
but, after a few minutes of running, maybe 5 or so
check engine light on, idle is smooth, throtle responose now is poor
from 800rpm -2000rpm after that rpm its fine.
I can duplicate the above senerio just by turning off & restarting the
engine- warm or cold. Cold takes a bit longer for CEL to come on &
poor throtle reponse.

Hmmmmmmmmmm.

2 seperate problems? I think??

problem 1) fuel pump runs & runs - won't pressurize & turn itself off:
leaking fuel injector- only some times????

Problem 2 check engine light - poor throtle response)
I cant get the codes from the check engine light KOER test because &
cant get the sequence of stomping the brake peddel & Wide open throtle
correct.
I get the code "no dynamic BOO WOT response" - blah blah - operator
error.
It could be the ECM not telling the injectors to fire properly?
especially in the no start condition? leaving injectors open? - no
fuel back pressure to turn off FP?

Well whado I do? dive into the injectors? replace ECM?(I'm thinking
yes+ cheaper than new injectors)
Obviously there is no pressure in the fuel rail to turn off the new &
old fuel pumps, I can hear & feel the bubbleing in the fuel regulator
return line.
Its getting cold here in the midwest & this baby has to start
reliably, for the wife & kids.
I'm wishfull thinking & running Sea Foam fuel injector cleaner will
help.
Fingers crossed - not much hope in pour in tank cleaners.


Hope this all makes sense,
Thanks in advance!!

Gil
(now 94 Explorer fuel system specialist trainee) NOT!!!!!!!!

First off.. stop swapping relays. Ford has a habit of "piggybacking"
relays - i.e., one relay will control a device PLUS the control circuit of
another relay. Swapping relays can have one trsavelling in circles.

Second, the PCM does not look at fuel pressure to turn the fuel pump on your
car on or off - when the key is first turned on, the PCM commands the fuel
pump on briefly to ensure that the fuel rail is charged but it has no way of
checking to see if, indeed, there is no pressure there. (This strategy
didn't appear until the last few years).

Are there no Continuous Memory codes displayed in the KOEO test? Also, it is
essential that you complete the KOER test.... the PCM uses the dynamic
response to test many sensors. I don't know which tool you are using nor
what cues it gives for when to perform the switch test and dynamic response
test but the switch test comes first....

HTH


"Gil" > wrote in message
m...
> have been through the entire fuel system....... except injectors.
>
> New fuel pressure reulator - easy
> New fuel filter - easy
> New fuel pump - bitch & 1/2 but warrentied no cost just 1 afternoon
> work.
> New/swap solinoids in fuse box - no brainer -
> New inertia switch - easy
>
> Ok?
>
> It wont start some times when cold. Cranks over like a top
> fuel pump runs & runs & runs till I turn off key.
> it never stops, like its supposed to afer 2 seconds causing the no
> start condition.
>
> When it does finally stop, maybe 30secs or upto a couple minutes at
> times,
> engine fires right up! runs great! but - see below:
> When warm no problem at all- FP runs for 2 sec & stops, engine starts.
> even after a few hours of sitting - seems like an over night time
> frame will bring it on.
>
>
> after running, engines idles smooth has good throtle response,
> no check engine light.
> but, after a few minutes of running, maybe 5 or so
> check engine light on, idle is smooth, throtle responose now is poor
> from 800rpm -2000rpm after that rpm its fine.
> I can duplicate the above senerio just by turning off & restarting the
> engine- warm or cold. Cold takes a bit longer for CEL to come on &
> poor throtle reponse.
>
> Hmmmmmmmmmm.
>
> 2 seperate problems? I think??
>
> problem 1) fuel pump runs & runs - won't pressurize & turn itself off:
> leaking fuel injector- only some times????
>
> Problem 2 check engine light - poor throtle response)
> I cant get the codes from the check engine light KOER test because &
> cant get the sequence of stomping the brake peddel & Wide open throtle
> correct.
> I get the code "no dynamic BOO WOT response" - blah blah - operator
> error.
> It could be the ECM not telling the injectors to fire properly?
> especially in the no start condition? leaving injectors open? - no
> fuel back pressure to turn off FP?
>
> Well whado I do? dive into the injectors? replace ECM?(I'm thinking
> yes+ cheaper than new injectors)
> Obviously there is no pressure in the fuel rail to turn off the new &
> old fuel pumps, I can hear & feel the bubbleing in the fuel regulator
> return line.
> Its getting cold here in the midwest & this baby has to start
> reliably, for the wife & kids.
> I'm wishfull thinking & running Sea Foam fuel injector cleaner will
> help.
> Fingers crossed - not much hope in pour in tank cleaners.
>
>
> Hope this all makes sense,
> Thanks in advance!!
>
> Gil
> (now 94 Explorer fuel system specialist trainee) NOT!!!!!!!!

All well & good.
Q: Does the ECM tell all the injectors to close when first turning on
key? Thus allowing fuel rail pressuraztion. if a couple aint closed
due to ECM mis control, bingo no pressure.
Then after crankshaft revolution (crank sensor) start pulsing??
Could this posibly be the culprit? On & off with the key will get the
pump to stop running! & will then start with fuel rail pressureized.

Maybe??
$90 from Autozone + $90 core.



"Jim Warman" > wrote in message news:<joomd.163719$df2.31385@edtnps89>...
> First off.. stop swapping relays. Ford has a habit of "piggybacking"
> relays - i.e., one relay will control a device PLUS the control circuit of
> another relay. Swapping relays can have one trsavelling in circles.
>
> Second, the PCM does not look at fuel pressure to turn the fuel pump on your
> car on or off - when the key is first turned on, the PCM commands the fuel
> pump on briefly to ensure that the fuel rail is charged but it has no way of
> checking to see if, indeed, there is no pressure there. (This strategy
> didn't appear until the last few years).
>
> Are there no Continuous Memory codes displayed in the KOEO test? Also, it is
> essential that you complete the KOER test.... the PCM uses the dynamic
> response to test many sensors. I don't know which tool you are using nor
> what cues it gives for when to perform the switch test and dynamic response
> test but the switch test comes first....
>
> HTH
>
>
> "Gil" > wrote in message
> m...
> > have been through the entire fuel system....... except injectors.
> >
> > New fuel pressure reulator - easy
> > New fuel filter - easy
> > New fuel pump - bitch & 1/2 but warrentied no cost just 1 afternoon
> > work.
> > New/swap solinoids in fuse box - no brainer -
> > New inertia switch - easy
> >
> > Ok?
> >
> > It wont start some times when cold. Cranks over like a top
> > fuel pump runs & runs & runs till I turn off key.
> > it never stops, like its supposed to afer 2 seconds causing the no
> > start condition.
> >
> > When it does finally stop, maybe 30secs or upto a couple minutes at
> > times,
> > engine fires right up! runs great! but - see below:
> > When warm no problem at all- FP runs for 2 sec & stops, engine starts.
> > even after a few hours of sitting - seems like an over night time
> > frame will bring it on.
> >
> >
> > after running, engines idles smooth has good throtle response,
> > no check engine light.
> > but, after a few minutes of running, maybe 5 or so
> > check engine light on, idle is smooth, throtle responose now is poor
> > from 800rpm -2000rpm after that rpm its fine.
> > I can duplicate the above senerio just by turning off & restarting the
> > engine- warm or cold. Cold takes a bit longer for CEL to come on &
> > poor throtle reponse.
> >
> > Hmmmmmmmmmm.
> >
> > 2 seperate problems? I think??
> >
> > problem 1) fuel pump runs & runs - won't pressurize & turn itself off:
> > leaking fuel injector- only some times????
> >
> > Problem 2 check engine light - poor throtle response)
> > I cant get the codes from the check engine light KOER test because &
> > cant get the sequence of stomping the brake peddel & Wide open throtle
> > correct.
> > I get the code "no dynamic BOO WOT response" - blah blah - operator
> > error.
> > It could be the ECM not telling the injectors to fire properly?
> > especially in the no start condition? leaving injectors open? - no
> > fuel back pressure to turn off FP?
> >
> > Well whado I do? dive into the injectors? replace ECM?(I'm thinking
> > yes+ cheaper than new injectors)
> > Obviously there is no pressure in the fuel rail to turn off the new &
> > old fuel pumps, I can hear & feel the bubbleing in the fuel regulator
> > return line.
> > Its getting cold here in the midwest & this baby has to start
> > reliably, for the wife & kids.
> > I'm wishfull thinking & running Sea Foam fuel injector cleaner will
> > help.
> > Fingers crossed - not much hope in pour in tank cleaners.
> >
> >
> > Hope this all makes sense,
> > Thanks in advance!!
> >
> > Gil
> > (now 94 Explorer fuel system specialist trainee) NOT!!!!!!!!

Rather than close the injectors, the PCM opens them (they are normally
closed). Depending on the program strategy, the PCM *may* pulse all the
injectors once when the key is turned to run or start to purge air or
vapours from the fuel rail and/or richen the mixture in the intake port.
Again, depending on program stategy, the PCM may bank fire sequential
injectors until the PCM sees the motor is running or until a predetermined
time period or temperature is reached.

Whether the fuel rail pressurizes or not, the fuel pump should only run
(KOEO) for 1.5 to 2 seconds (gasoline engines) and wont turn on again until
the PCM sees an rpm signal. If your pump is running continuously KOEO, then
there is a problem with relay, wiring or PCM (the relay control circuit is
ground side switched by the PCM). You'll need to do some circuit testing
while the problem is happening. It makes no sense to throw parts at this
thing willy-nilly without some kind of diagnostic proof of a problem.


"Gil" > wrote in message
m...
> All well & good.
> Q: Does the ECM tell all the injectors to close when first turning on
> key? Thus allowing fuel rail pressuraztion. if a couple aint closed
> due to ECM mis control, bingo no pressure.
> Then after crankshaft revolution (crank sensor) start pulsing??
> Could this posibly be the culprit? On & off with the key will get the
> pump to stop running! & will then start with fuel rail pressureized.
>
> Maybe??
> $90 from Autozone + $90 core.
>
>
>
> "Jim Warman" > wrote in message
> news:<joomd.163719$df2.31385@edtnps89>...
>> First off.. stop swapping relays. Ford has a habit of "piggybacking"
>> relays - i.e., one relay will control a device PLUS the control circuit
>> of
>> another relay. Swapping relays can have one trsavelling in circles.
>>
>> Second, the PCM does not look at fuel pressure to turn the fuel pump on
>> your
>> car on or off - when the key is first turned on, the PCM commands the
>> fuel
>> pump on briefly to ensure that the fuel rail is charged but it has no way
>> of
>> checking to see if, indeed, there is no pressure there. (This strategy
>> didn't appear until the last few years).
>>
>> Are there no Continuous Memory codes displayed in the KOEO test? Also, it
>> is
>> essential that you complete the KOER test.... the PCM uses the dynamic
>> response to test many sensors. I don't know which tool you are using nor
>> what cues it gives for when to perform the switch test and dynamic
>> response
>> test but the switch test comes first....
>>
>> HTH
>>
>>
>> "Gil" > wrote in message
>> m...
>> > have been through the entire fuel system....... except injectors.
>> >
>> > New fuel pressure reulator - easy
>> > New fuel filter - easy
>> > New fuel pump - bitch & 1/2 but warrentied no cost just 1 afternoon
>> > work.
>> > New/swap solinoids in fuse box - no brainer -
>> > New inertia switch - easy
>> >
>> > Ok?
>> >
>> > It wont start some times when cold. Cranks over like a top
>> > fuel pump runs & runs & runs till I turn off key.
>> > it never stops, like its supposed to afer 2 seconds causing the no
>> > start condition.
>> >
>> > When it does finally stop, maybe 30secs or upto a couple minutes at
>> > times,
>> > engine fires right up! runs great! but - see below:
>> > When warm no problem at all- FP runs for 2 sec & stops, engine starts.
>> > even after a few hours of sitting - seems like an over night time
>> > frame will bring it on.
>> >
>> >
>> > after running, engines idles smooth has good throtle response,
>> > no check engine light.
>> > but, after a few minutes of running, maybe 5 or so
>> > check engine light on, idle is smooth, throtle responose now is poor
>> > from 800rpm -2000rpm after that rpm its fine.
>> > I can duplicate the above senerio just by turning off & restarting the
>> > engine- warm or cold. Cold takes a bit longer for CEL to come on &
>> > poor throtle reponse.
>> >
>> > Hmmmmmmmmmm.
>> >
>> > 2 seperate problems? I think??
>> >
>> > problem 1) fuel pump runs & runs - won't pressurize & turn itself off:
>> > leaking fuel injector- only some times????
>> >
>> > Problem 2 check engine light - poor throtle response)
>> > I cant get the codes from the check engine light KOER test because &
>> > cant get the sequence of stomping the brake peddel & Wide open throtle
>> > correct.
>> > I get the code "no dynamic BOO WOT response" - blah blah - operator
>> > error.
>> > It could be the ECM not telling the injectors to fire properly?
>> > especially in the no start condition? leaving injectors open? - no
>> > fuel back pressure to turn off FP?
>> >
>> > Well whado I do? dive into the injectors? replace ECM?(I'm thinking
>> > yes+ cheaper than new injectors)
>> > Obviously there is no pressure in the fuel rail to turn off the new &
>> > old fuel pumps, I can hear & feel the bubbleing in the fuel regulator
>> > return line.
>> > Its getting cold here in the midwest & this baby has to start
>> > reliably, for the wife & kids.
>> > I'm wishfull thinking & running Sea Foam fuel injector cleaner will
>> > help.
>> > Fingers crossed - not much hope in pour in tank cleaners.
>> >
>> >
>> > Hope this all makes sense,
>> > Thanks in advance!!
>> >
>> > Gil
>> > (now 94 Explorer fuel system specialist trainee) NOT!!!!!!!!

"Jim Warman" > wrote in message news:<xXTmd.183833$9b.6178@edtnps84>...
> Rather than close the injectors, the PCM opens them (they are normally
> closed). Depending on the program strategy, the PCM *may* pulse all the
> injectors once when the key is turned to run or start to purge air or
> vapours from the fuel rail and/or richen the mixture in the intake port.
> Again, depending on program stategy, the PCM may bank fire sequential
> injectors until the PCM sees the motor is running or until a predetermined
> time period or temperature is reached.
>
> Whether the fuel rail pressurizes or not, the fuel pump should only run
> (KOEO) for 1.5 to 2 seconds (gasoline engines) and wont turn on again until
> the PCM sees an rpm signal. If your pump is running continuously KOEO, then
> there is a problem with relay, wiring or PCM (the relay control circuit is
> ground side switched by the PCM). You'll need to do some circuit testing
> while the problem is happening. It makes no sense to throw parts at this
> thing willy-nilly without some kind of diagnostic proof of a problem.

Ya I know about throwing money at car problems.
But at this point, it does seem like the ECM or PCM (the one that
controls the injector pulses) is mal-functioning. I can get it to stop
just by waiting, or by switching the key on - off (no engine cranking)
Or after its running & has gone into a "check engine light" condition
& poor throttle response, turn the engine off & restart - no check
engine light & great throttle respose - for about 1-5 minutes!
Evertime.
PCM or ECM?? the one behind the passenger side headlight.
Carquest says there were 4 or 5 to choose from, depending on which one
I had.
great! $140.

I think I'm just gonna do it this weekend.


Gil


-
>
>
> "Gil" > wrote in message
> m...
> > All well & good.
> > Q: Does the ECM tell all the injectors to close when first turning on
> > key? Thus allowing fuel rail pressuraztion. if a couple aint closed
> > due to ECM mis control, bingo no pressure.
> > Then after crankshaft revolution (crank sensor) start pulsing??
> > Could this posibly be the culprit? On & off with the key will get the
> > pump to stop running! & will then start with fuel rail pressureized.
> >
> > Maybe??
> > $90 from Autozone + $90 core.
> >
> >
> >
> > "Jim Warman" > wrote in message
> > news:<joomd.163719$df2.31385@edtnps89>...
> >> First off.. stop swapping relays. Ford has a habit of "piggybacking"
> >> relays - i.e., one relay will control a device PLUS the control circuit
> >> of
> >> another relay. Swapping relays can have one trsavelling in circles.
> >>
> >> Second, the PCM does not look at fuel pressure to turn the fuel pump on
> >> your
> >> car on or off - when the key is first turned on, the PCM commands the
> >> fuel
> >> pump on briefly to ensure that the fuel rail is charged but it has no way
> >> of
> >> checking to see if, indeed, there is no pressure there. (This strategy
> >> didn't appear until the last few years).
> >>
> >> Are there no Continuous Memory codes displayed in the KOEO test? Also, it
> >> is
> >> essential that you complete the KOER test.... the PCM uses the dynamic
> >> response to test many sensors. I don't know which tool you are using nor
> >> what cues it gives for when to perform the switch test and dynamic
> >> response
> >> test but the switch test comes first....
> >>
> >> HTH
> >>
> >>
> >> "Gil" > wrote in message
> >> m...
> >> > have been through the entire fuel system....... except injectors.
> >> >
> >> > New fuel pressure reulator - easy
> >> > New fuel filter - easy
> >> > New fuel pump - bitch & 1/2 but warrentied no cost just 1 afternoon
> >> > work.
> >> > New/swap solinoids in fuse box - no brainer -
> >> > New inertia switch - easy
> >> >
> >> > Ok?
> >> >
> >> > It wont start some times when cold. Cranks over like a top
> >> > fuel pump runs & runs & runs till I turn off key.
> >> > it never stops, like its supposed to afer 2 seconds causing the no
> >> > start condition.
> >> >
> >> > When it does finally stop, maybe 30secs or upto a couple minutes at
> >> > times,
> >> > engine fires right up! runs great! but - see below:
> >> > When warm no problem at all- FP runs for 2 sec & stops, engine starts.
> >> > even after a few hours of sitting - seems like an over night time
> >> > frame will bring it on.
> >> >
> >> >
> >> > after running, engines idles smooth has good throtle response,
> >> > no check engine light.
> >> > but, after a few minutes of running, maybe 5 or so
> >> > check engine light on, idle is smooth, throtle responose now is poor
> >> > from 800rpm -2000rpm after that rpm its fine.
> >> > I can duplicate the above senerio just by turning off & restarting the
> >> > engine- warm or cold. Cold takes a bit longer for CEL to come on &
> >> > poor throtle reponse.
> >> >
> >> > Hmmmmmmmmmm.
> >> >
> >> > 2 seperate problems? I think??
> >> >
> >> > problem 1) fuel pump runs & runs - won't pressurize & turn itself off:
> >> > leaking fuel injector- only some times????
> >> >
> >> > Problem 2 check engine light - poor throtle response)
> >> > I cant get the codes from the check engine light KOER test because &
> >> > cant get the sequence of stomping the brake peddel & Wide open throtle
> >> > correct.
> >> > I get the code "no dynamic BOO WOT response" - blah blah - operator
> >> > error.
> >> > It could be the ECM not telling the injectors to fire properly?
> >> > especially in the no start condition? leaving injectors open? - no
> >> > fuel back pressure to turn off FP?
> >> >
> >> > Well whado I do? dive into the injectors? replace ECM?(I'm thinking
> >> > yes+ cheaper than new injectors)
> >> > Obviously there is no pressure in the fuel rail to turn off the new &
> >> > old fuel pumps, I can hear & feel the bubbleing in the fuel regulator
> >> > return line.
> >> > Its getting cold here in the midwest & this baby has to start
> >> > reliably, for the wife & kids.
> >> > I'm wishfull thinking & running Sea Foam fuel injector cleaner will
> >> > help.
> >> > Fingers crossed - not much hope in pour in tank cleaners.
> >> >
> >> >
> >> > Hope this all makes sense,
> >> > Thanks in advance!!
> >> >
> >> > Gil
> >> > (now 94 Explorer fuel system specialist trainee) NOT!!!!!!!!

Well..... you keep saying that the CEL has come on when the problem
occurs..... is there some reason you arren't aving the code(s) read? This is
offering what could be a very important clue to solving your problem. I
would think (at the very least) that you would have a memory code stored in
the PCM.

The module you are referring to, behind the right side headlight, would be
the ignition control module..... not the PCM.

"Jim Warman" > wrote in message news:<QRbnd.277$y72.229@clgrps12>...
> Well..... you keep saying that the CEL has come on when the problem
> occurs..... is there some reason you arren't aving the code(s) read? This is
> offering what could be a very important clue to solving your problem. I
> would think (at the very least) that you would have a memory code stored in
> the PCM.
>
> The module you are referring to, behind the right side headlight, would be
> the ignition control module..... not the PCM.

Which one ICM or PCM gives the injectors a pulse when turning on the
key?
Is that the culprit not releasing that pulse until I cycle the key
on-off a bunch of times?
I will try again to get the codes this weekend. Maybe between my son &
I we can get it to go into the second part of KOER test.
All I come up with in the first part is "insufficant EGR
voltage/opening"
That anit it.

Thanks again.

The PCM controls the injectors. The ICM controls spark at the behest of the
PCM. The ICM also provides rpm signal to the PCM.

What test are you using to prove that the PCM isn't pulsing the injectors?

Rather than giving some aftermarket code description, I am better served
with the exact code retrieved. This way I can refer to the factoy service
manuals.


"Gil" > wrote in message
m...
> "Jim Warman" > wrote in message
> news:<QRbnd.277$y72.229@clgrps12>...
>> Well..... you keep saying that the CEL has come on when the problem
>> occurs..... is there some reason you arren't aving the code(s) read? This
>> is
>> offering what could be a very important clue to solving your problem. I
>> would think (at the very least) that you would have a memory code stored
>> in
>> the PCM.
>>
>> The module you are referring to, behind the right side headlight, would
>> be
>> the ignition control module..... not the PCM.
>
> Which one ICM or PCM gives the injectors a pulse when turning on the
> key?
> Is that the culprit not releasing that pulse until I cycle the key
> on-off a bunch of times?
> I will try again to get the codes this weekend. Maybe between my son &
> I we can get it to go into the second part of KOER test.
> All I come up with in the first part is "insufficant EGR
> voltage/opening"
> That anit it.
>
> Thanks again.

"Jim Warman" > wrote in message news:<Fjznd.194202$9b.128910@edtnps84>...
> The PCM controls the injectors. The ICM controls spark at the behest of the
> PCM. The ICM also provides rpm signal to the PCM.
>
> What test are you using to prove that the PCM isn't pulsing the injectors?
>
> Rather than giving some aftermarket code description, I am better served
> with the exact code retrieved. This way I can refer to the factoy service
> manuals.
>
Here are the last set of codes I got from my Actron code scanner:

327
332
327
332
----
327
332
327
332
----
332
538
536
332
----
538
536

All this is telling me that the EGR valve is not functioning or its
not getting detected funciotning- but is it? I tryed unpluging &
capped the vacuum line to it, did not make any differece running or
driving. Its hooked back properly now.

the 538 536 tell me I cant get it to do the second part of the KOER
test.?

Make any sense for the problem at hand?


> "Gil" > wrote in message
> m...
> > "Jim Warman" > wrote in message
> > news:<QRbnd.277$y72.229@clgrps12>...
> >> Well..... you keep saying that the CEL has come on when the problem
> >> occurs..... is there some reason you arren't aving the code(s) read? This
> >> is
> >> offering what could be a very important clue to solving your problem. I
> >> would think (at the very least) that you would have a memory code stored
> >> in
> >> the PCM.
> >>
> >> The module you are referring to, behind the right side headlight, would
> >> be
> >> the ignition control module..... not the PCM.
> >
> > Which one ICM or PCM gives the injectors a pulse when turning on the
> > key?
> > Is that the culprit not releasing that pulse until I cycle the key
> > on-off a bunch of times?
> > I will try again to get the codes this weekend. Maybe between my son &
> > I we can get it to go into the second part of KOER test.
> > All I come up with in the first part is "insufficant EGR
> > voltage/opening"
> > That anit it.
> >
> > Thanks again.

The 327 and 332 are EGR related codes. The DPFE sensor on these motors is
notorious for failing and I think it would be a safe bet to change the
sensor. Be sure the two rubber hoses going to the sensor are in good
condition and that the metal tubes aren't plugged off.

The 538 and 536 simply indicated that the dynamic response test and BOO
switch tests were either not performed or the PCM didn't see a change of
state.

However, this still doesn't address your fuel pump concern. The only way you
can be sure of having adequate fuel pressure is to use a guage. As for the
pump running when it shouldn't, you still need to do some basic electrical
diagnosis.


"Gil" > wrote in message
...
> "Jim Warman" > wrote in message
> news:<Fjznd.194202$9b.128910@edtnps84>...
>> The PCM controls the injectors. The ICM controls spark at the behest of
>> the
>> PCM. The ICM also provides rpm signal to the PCM.
>>
>> What test are you using to prove that the PCM isn't pulsing the
>> injectors?
>>
>> Rather than giving some aftermarket code description, I am better served
>> with the exact code retrieved. This way I can refer to the factoy service
>> manuals.
>>
> Here are the last set of codes I got from my Actron code scanner:
>
> 327
> 332
> 327
> 332
> ----
> 327
> 332
> 327
> 332
> ----
> 332
> 538
> 536
> 332
> ----
> 538
> 536
>
> All this is telling me that the EGR valve is not functioning or its
> not getting detected funciotning- but is it? I tryed unpluging &
> capped the vacuum line to it, did not make any differece running or
> driving. Its hooked back properly now.
>
> the 538 536 tell me I cant get it to do the second part of the KOER
> test.?
>
> Make any sense for the problem at hand?
>
>