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Fuel Enrichment Switch
I have way to much fuel in the exhaust of my 85 Vanagon. After reading
the bentley manual I found it should have a 'fuel enrichment switch' that basically dumps fuel into the system at high rpms. Can this switch go bad and cause my problem? Would bypassing this switch hurt anything? And can anyone recommend where I could get a replacement switch if it is found to be faulty? Thanks *MYSTIC* |
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#2
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Fuel Enrichment Switch
On Sun, 15 Jul 2007 18:11:02 -0700, *MYSTIC* >
wrote: >I have way to much fuel in the exhaust of my 85 Vanagon. After reading >the bentley manual I found it should have a 'fuel enrichment switch' >that basically dumps fuel into the system at high rpms. Can this switch >go bad and cause my problem? Would bypassing this switch hurt anything? >And can anyone recommend where I could get a replacement switch if it is >found to be faulty? > >Thanks >*MYSTIC* Have you replaced the oxygen sensor assuming that this is a gas pwered vehicle? The switch is nothing special. Well at least on a Rabbit or Golf. You can find them at junkyards. But I do not own a Westi so I am just guessing. http://www.van-cafe.com/sp/8691V/ECUManual.pdf |
#3
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Fuel Enrichment Switch
Jim Behning wrote:
> On Sun, 15 Jul 2007 18:11:02 -0700, *MYSTIC* > > wrote: > > >>I have way to much fuel in the exhaust of my 85 Vanagon. After reading >>the bentley manual I found it should have a 'fuel enrichment switch' >>that basically dumps fuel into the system at high rpms. Can this switch >>go bad and cause my problem? Would bypassing this switch hurt anything? >>And can anyone recommend where I could get a replacement switch if it is >>found to be faulty? >> >>Thanks >>*MYSTIC* > > Have you replaced the oxygen sensor assuming that this is a gas pwered > vehicle? The switch is nothing special. Well at least on a Rabbit or > Golf. You can find them at junkyards. But I do not own a Westi so I am > just guessing. > http://www.van-cafe.com/sp/8691V/ECUManual.pdf I've replaced alot of things... O2 sensor air flow meter fuel pressure regulator temp sensor 2 Cat Converter I'm running out of things that can go wrong. Any other suggestions? |
#4
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Fuel Enrichment Switch
Jim Behning wrote:
> just guessing. > http://www.van-cafe.com/sp/8691V/ECUManual.pdf This link is for the 86 and newer models....got a link for the previous year? |
#5
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Fuel Enrichment Switch
Not sure of your engine nor do I know much about the Vanagons. <:-)
Yes I would think that it could go bad and cause problems. It might be on the throttle body. Yes bypassing it might cause a problem when the engine goes to Wide Open Throttle. It might run too lean then. Dealer should be able to get one for you. Also busdepot.com might have them if you need one. Does your engine have 4 or 5 injectors? The 5th injector could be a cold start valve which could be faulty and dump gas into the intake/engine. Did you electrically test the sensors and wiring at the ECM plug with a Volt Ohm Meter? I have seen bad/weak ign. coils cause a seemingly rich problem, but after a new ign coil all was good. -- later, dave (One out of many daves) "*MYSTIC*" > wrote in message s.com... >I have way to much fuel in the exhaust of my 85 Vanagon. After reading the >bentley manual I found it should have a 'fuel enrichment switch' that >basically dumps fuel into the system at high rpms. Can this switch go bad >and cause my problem? Would bypassing this switch hurt anything? And can >anyone recommend where I could get a replacement switch if it is found to >be faulty? > > Thanks > *MYSTIC* |
#6
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Fuel Enrichment Switch
On Sun, 15 Jul 2007 19:32:51 -0700, *MYSTIC* >
wrote: >Jim Behning wrote: > >> On Sun, 15 Jul 2007 18:11:02 -0700, *MYSTIC* > >> wrote: >> >> >>>I have way to much fuel in the exhaust of my 85 Vanagon. After reading >>>the bentley manual I found it should have a 'fuel enrichment switch' >>>that basically dumps fuel into the system at high rpms. Can this switch >>>go bad and cause my problem? Would bypassing this switch hurt anything? >>>And can anyone recommend where I could get a replacement switch if it is >>>found to be faulty? >>> >>>Thanks >>>*MYSTIC* >> >> Have you replaced the oxygen sensor assuming that this is a gas pwered >> vehicle? The switch is nothing special. Well at least on a Rabbit or >> Golf. You can find them at junkyards. But I do not own a Westi so I am >> just guessing. >> http://www.van-cafe.com/sp/8691V/ECUManual.pdf >I've replaced alot of things... > >O2 sensor >air flow meter >fuel pressure regulator >temp sensor 2 >Cat Converter > > >I'm running out of things that can go wrong. Any other suggestions? http://www.bus-boys.com/bb13383.htm#fuelinject There are testing services that will flow test and clean you injectors for about $25 a piece. Or you could buy an ultrasonic cleaner for about $150 that might help clean the injectors. I like the idea of having the injectors flow tested so you know that an expensive part is not causing a problem. For my truck those injectors are about $120 each. Someone I respect menitoned this company for injector testing. http://www.rceng.com/service.htm One of my friends won a credit card dispute with a dealer when they started changing parts willy nilly on his car without fixing the problem. He sent his old working injectors off to get flow tested and they were good. |
#7
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Fuel Enrichment Switch
On Jul 15, 9:11 pm, *MYSTIC* > wrote:
> I have way to much fuel in the exhaust of my 85 Vanagon. After reading > the bentley manual I found it should have a 'fuel enrichment switch' > that basically dumps fuel into the system at high rpms. Can this switch > go bad and cause my problem? Would bypassing this switch hurt anything? > And can anyone recommend where I could get a replacement switch if it is > found to be faulty? > > Thanks > *MYSTIC* Before you do anything by way of replacement, have you run a couple of cans of Techron (or equal) through the system? The '87 Westie we sold recently had a similar problem on receipt that cleaned right up after the Techron treatment (it took two tanks). And it did then pass an honest PA Emissions Inspection. But to answer you questions: Yes, it would "hurt" if you ever run at full-throttle (such as up any hill steeper than 2%). And Yes, you can get such a switch, either from the dealer (with time), or from any of several after-market sources. I have found www.busdepot.com to be very good... and they have many parts that they do not list on their website. I would strongly suggest you call them, they are _VERY_ helpful over the phone. But check that this is really the problem, and do make sure that the system is clean and otherwise running properly. Several have suggested you check your fuel-injectors... after and if Techron fails, start there. Peter Wieck Wyncote, PA |
#8
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Fuel Enrichment Switch
I know you mentioned in an earlier post about replacing the fuel pressure
regulator. Did you also check/replace the vaccuum lines as well that control it? A vacuum leak can mess it up too. |
#9
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Fuel Enrichment Switch
"Jim Behning" > wrote in message
news > On Sun, 15 Jul 2007 19:32:51 -0700, *MYSTIC* > > wrote: > >>Jim Behning wrote: >> >>> On Sun, 15 Jul 2007 18:11:02 -0700, *MYSTIC* > >>> wrote: >>> >>> >>>>I have way to much fuel in the exhaust of my 85 Vanagon. After reading >>>>the bentley manual I found it should have a 'fuel enrichment switch' >>>>that basically dumps fuel into the system at high rpms. Can this switch >>>>go bad and cause my problem? Would bypassing this switch hurt anything? >>>>And can anyone recommend where I could get a replacement switch if it is >>>>found to be faulty? >>>> >>>>Thanks >>>>*MYSTIC* >>> >>> Have you replaced the oxygen sensor assuming that this is a gas pwered >>> vehicle? The switch is nothing special. Well at least on a Rabbit or >>> Golf. You can find them at junkyards. But I do not own a Westi so I am >>> just guessing. >>> http://www.van-cafe.com/sp/8691V/ECUManual.pdf >>I've replaced alot of things... >> >>O2 sensor >>air flow meter >>fuel pressure regulator >>temp sensor 2 >>Cat Converter >> >> >>I'm running out of things that can go wrong. Any other suggestions? > > http://www.bus-boys.com/bb13383.htm#fuelinject > > There are testing services that will flow test and clean you injectors > for about $25 a piece. Or you could buy an ultrasonic cleaner for > about $150 that might help clean the injectors. I like the idea of > having the injectors flow tested so you know that an expensive part is > not causing a problem. For my truck those injectors are about $120 > each. > > Someone I respect menitoned this company for injector testing. > http://www.rceng.com/service.htm One of my friends won a credit card > dispute with a dealer when they started changing parts willy nilly on > his car without fixing the problem. He sent his old working injectors > off to get flow tested and they were good. By the time you spend all that money on testing/cleaning the injectors, you could have bought new ones and replaced them yourself. 88 VW Fox wagon. CIS. Not screw-in, press fit type injectors. Hard to remove, but doable. Dave |
#10
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Fuel Enrichment Switch
On Tue, 17 Jul 2007 14:06:07 GMT, "Dave" >
wrote: >"Jim Behning" > wrote in message >news >> On Sun, 15 Jul 2007 19:32:51 -0700, *MYSTIC* > >> wrote: >> >>>Jim Behning wrote: >>> >>>> On Sun, 15 Jul 2007 18:11:02 -0700, *MYSTIC* > >>>> wrote: >>>> >>>> >>>>>I have way to much fuel in the exhaust of my 85 Vanagon. After reading >>>>>the bentley manual I found it should have a 'fuel enrichment switch' >>>>>that basically dumps fuel into the system at high rpms. Can this switch >>>>>go bad and cause my problem? Would bypassing this switch hurt anything? >>>>>And can anyone recommend where I could get a replacement switch if it is >>>>>found to be faulty? >>>>> >>>>>Thanks >>>>>*MYSTIC* >>>> >>>> Have you replaced the oxygen sensor assuming that this is a gas pwered >>>> vehicle? The switch is nothing special. Well at least on a Rabbit or >>>> Golf. You can find them at junkyards. But I do not own a Westi so I am >>>> just guessing. >>>> http://www.van-cafe.com/sp/8691V/ECUManual.pdf >>>I've replaced alot of things... >>> >>>O2 sensor >>>air flow meter >>>fuel pressure regulator >>>temp sensor 2 >>>Cat Converter >>> >>> >>>I'm running out of things that can go wrong. Any other suggestions? >> >> http://www.bus-boys.com/bb13383.htm#fuelinject >> >> There are testing services that will flow test and clean you injectors >> for about $25 a piece. Or you could buy an ultrasonic cleaner for >> about $150 that might help clean the injectors. I like the idea of >> having the injectors flow tested so you know that an expensive part is >> not causing a problem. For my truck those injectors are about $120 >> each. >> >> Someone I respect menitoned this company for injector testing. >> http://www.rceng.com/service.htm One of my friends won a credit card >> dispute with a dealer when they started changing parts willy nilly on >> his car without fixing the problem. He sent his old working injectors >> off to get flow tested and they were good. > >By the time you spend all that money on testing/cleaning the injectors, you >could have bought new ones and replaced them yourself. > >88 VW Fox wagon. CIS. Not screw-in, press fit type injectors. Hard to >remove, but doable. >Dave > Testing is about $25 an injector. On my truck injectors are about $120 each. OK say $500 for a new set versus $100 to clean and inspect. I am I missing something in the math department? You are correct that some cars do have remanufactured injectors available for $50 each. I see busdepot has cleaned and tested injectors for $50 each. |
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