Beetle 1.6 petrol overfuelling issue!

Az877

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Jan 8, 2021
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Hi. I have a 1.6 petrol 2007 beetle which has a overfuelling issue causing the car to white smoke badly. One injector is putting a lot of fuel through, changed the injector and the car ran fine for 5 minutes then fault came back, swapped and changed injectors with the same results,leaning towards this being a ecu / wiring issue? Anybody come across this themselves? Any advice would be greatly appreciated.
 

Crasher

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Without a system such as VCDS (even a used older HEX NET version off of fleaBay) you really are going to struggle to get anywhere. A simple code reader is not worth it either, you need to be able to access certain in depth functions such as "measuring blocks", "adaptation" and "Basic Settings" so you can view signals, clear learnt values and turn off the lambda control to help pinpoint the issue.
 

Az877

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Joined
Jan 8, 2021
Messages
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Without a system such as VCDS (even a used older HEX NET version off of fleaBay) you really are going to struggle to get anywhere. A simple code reader is not worth it either, you need to be able to access certain in depth functions such as "measuring blocks", "adaptation" and "Basic Settings" so you can view signals, clear learnt values and turn off the lambda control to help pinpoint the issue.
I’ve had the car in with a mechanic who has the diagnostic software (not sure which) he has diagnosed a fault with the signal to the injector on number 1, had the ecu tested, company says the ecu is fine? Although the data says there is! As I’m not that mechanically minded I don’t fully understand all the results and readings etc!
 

Crasher

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If the ECU sees an emissions fault it uses the crank and cam timing signals and a very complex algorithm to determine which cylinder is at fault and to then follow EU4 and EU5 emissions rules it MUST shut down the offending cylinders injector to reduce emissions and protect the catalyst. Has a compression test been carried out? The engines type code will be BFS and this is unique to the New Beetle between 2005 and 2010 but is basically the same as a Golf/A3 etc BSE and BSF. You need to get it to a VW specialist.
 

Az877

New member
Joined
Jan 8, 2021
Messages
4
If the ECU sees an emissions fault it uses the crank and cam timing signals and a very complex algorithm to determine which cylinder is at fault and to then follow EU4 and EU5 emissions rules it MUST shut down the offending cylinders injector to reduce emissions and protect the catalyst. Has a compression test been carried out? The engines type code will be BFS and this is unique to the New Beetle between 2005 and 2010 but is basically the same as a Golf/A3 etc BSE and BSF. You need to get it to a VW specialist.
Injector 1 is pissing fuel through which causes it to white smoke horrendously as you can imagine but the if driving, the car momentarily stops smoking and returns to driving on all four, when this happens it drives spot on albeit only for a couple of minutes. Had a compression test done all compressions are fine. Had a second compression test done (different garage,for second opinion) came back as down on cylinder 1 (45psi).
 
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