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#21
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Help me diagnose this splutter...
"Catman" > wrote in message
... > On 11/08/2011 08:51, R C Nesbit wrote: >> Gt spoke: >>> I got a cable and diag software. I found 2 fault codes: P0300 - >>> "Misfires >>> detected (generic) and P0303 - "Cylinder 3 ifnition failures". >> >> These are the same fault codes we get on Lesley's 147 2.0TS >> >> Code comes on, car is hard to start, rough idle and needs more revs to >> get >> moving. >> Clear the code and everything is fine, but error returns very quickly >> (10 - >> 15 miles) >> This was with the generic software with the cable. >> I downloaded the AlfaDiag software and it now also reveals P0141 >> "O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 2)" >> > > Is this the lambda sensor? I thought it only had one. I used the FiatECUScan software (as its free) on my 2.0JTS and there are many Lambda parameters that suggest there are at least 2 lambda sensors, maybe 4: Lambda 1 signal (pre-cat) Lambda signal 2 (pre-cat) Lambda signal 1 (after-cat) Lambda signal 2 (after-cat) Lambda sensor 1 integrator Lambda sensor 2 integrator Lambda 1 status (pre-cat) Lambda 1 status (after-cat) Lambda 2 status (pre-cat) Lambda 2 status (after-cat) |
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#22
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Help me diagnose this splutter...
On 11/08/2011 11:29, GT wrote:
> > wrote in message > ... >> On 11/08/2011 08:51, R C Nesbit wrote: >>> Gt spoke: >>>> I got a cable and diag software. I found 2 fault codes: P0300 - >>>> "Misfires >>>> detected (generic) and P0303 - "Cylinder 3 ifnition failures". >>> >>> These are the same fault codes we get on Lesley's 147 2.0TS >>> >>> Code comes on, car is hard to start, rough idle and needs more revs to >>> get >>> moving. >>> Clear the code and everything is fine, but error returns very quickly >>> (10 - >>> 15 miles) >>> This was with the generic software with the cable. >>> I downloaded the AlfaDiag software and it now also reveals P0141 >>> "O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 2)" >>> >> >> Is this the lambda sensor? I thought it only had one. > > I used the FiatECUScan software (as its free) on my 2.0JTS and there are > many Lambda parameters that suggest there are at least 2 lambda sensors, > maybe 4: > > Lambda 1 signal (pre-cat) > Lambda signal 2 (pre-cat) > Lambda signal 1 (after-cat) > Lambda signal 2 (after-cat) > Lambda sensor 1 integrator > Lambda sensor 2 integrator > Lambda 1 status (pre-cat) > Lambda 1 status (after-cat) > Lambda 2 status (pre-cat) > Lambda 2 status (after-cat) > > Interesting I think the JTS is a bit more complex, though. -- Catman MIB#14 SKoGA#6 TEAR#4 BOTAFOF#38 Apostle#21 COSOC#3 Tyger, Tyger Burning Bright (Remove rust to reply) 116 Giulietta 3.0l Sprint 1.7 147 TS GT 3.2 V6 Triumph Sprint ST 1050: It's blue, see. #www.cuore-sportivo.co.uk |
#23
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Help me diagnose this splutter...
On Wed, 10 Aug 2011 14:44:14 +0100, "Dave Savage"
> wrote: >if the compressor (whatever that is) is unwell, how much >are we talking to get it fixed / replaced ? First Google guess ( I don't know these guys) http://reviews.ebay.co.uk/Alfa-Romeo...00000002707188 To this, you will need to add fitting and filling costs. At another guess, I wouldn't be surprised if that pair added 250UKP to the purchase price. A refill and leak test alone will be 50-100UKP (ish) depending on supplier. If you can see the compressor under the bonnet and it looks a simple job to replace then the labour might well be less. The 156 tends not to be that easy to work on and the engine bay can be a bit cluttered however. -- Z Scotland Alfa Romeo 156 2.4JTD Veloce Leather (sold) 'Oil' be seeing you.. (Email must have the word 'Alfa' in the subject line to get through auto-filtering) |
#24
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Help me diagnose this splutter...
"GT" > wrote in message
b.com... > "Catman" > wrote in message > ... >> On 20/01/2011 12:13, GT wrote: >>> 156 2002, 2.0 JTS petrol. I (the car)had a splutter/cough a year or so >>> ago >>> and it eventually went away on its own. Its come back now and I would >>> like >>> to at least figure out what is causing it, if not fix it. The problem: >>> >>> Its independent of gear (done it in 3rd, 4th 5th). I don't tend to rev >>> over >>> about 4000 most of the time as its a nice torquey engine. Problem occurs >>> under load, usually at around 2000 revs. It is repeatable - the 270 >>> degree >>> slip road onto the M8 at the top of Livingston is about a 50mph corner, >>> 5th >>> gear. As I come out of it I speed up to er... 70 (ho humm!) and it will >>> splutter most times there. It also does it in 3rd coming out of the >>> silly >>> little roundabouts they stick along in-town dual carriageway 40mph >>> stretches. Its a cough/splutter, lack of power, followed by 'beep beep' >>> motor control failure - go to dealer. As I feel the splutter starting, >>> if I >>> back off on the accellerator and just speed up more gradually all is >>> well. >>> If I drop a cog and increase the revs, all is fine. >>> >>> I have ruled out dirty fuel as its been through several fill ups. >>> I have rules out engine temperature as it doesn't make any difference. >>> I have ruled out spark plugs and electrics because the revs are low, so >>> the >>> demand is not so much - wouldn't this cause problems at higher revs when >>> there are more sparks per minute? >> >> *maybe* > > I got a cable and diag software. I found 2 fault codes: P0300 - "Misfires > detected (generic) and P0303 - "Cylinder 3 ifnition failures". > > "The emissions Monitoring system has detected misfires, an Air/Fuel > micture problem or other indicators of emissions exceeding the permissible > level. Check the plugs, ignition and fuel systems, and the ending > mechanical condition, and that the oild level is not too high, or oil > change overdue. Defects contribute also to O2 sensor degradeation and > premature catalytic converter efficiency loss. > > The reason for this fault is that the EDU has received very high signal > from the sensor. The fault is not is not detected now, but it is stored in > memory. Clear fault codes, and observe for future appearance of the same > fault. Dashboard warning light was activated for this fault." > > Sounds like the spark plug or wiring is failing on cylinder 3. I checked > out the throttle sensor and whatever I did to the pedal, the software > reported a valid position - I couldn't get the graph to flicker or jump at > all. > > Any thoughts to add? Still not done anything about this yet, but another point to report that might point to something specific: I've been experimenting over the last few days and it appears to behave perfectly (faster) when the engine is cold - only starts to splutter under heavy engine load and after the temp guage starts to move - maybe over 60deg. |
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