mattwelcer 0 Posted June 1, 2010 When the car has warmed up the idle isn't smooth, it fluctuates between about 750-950rpm. But if you dab the throttle the idle the stabilizes for a while, maybe 30secs and then starts to fluctuate again. At first I thought it was an air leak in the intake but I can't find one. The other thing noticeable on the car is that it stinks of petrol but I can't find any leaks (still need to check the injector seals though). Could it be running rich and what can be the causes of this, assuming it is not the injectors. Can it be the thermostat or is it something else like fuel trim? Can it be adjusted using VAG-COM? Or would the car need to have its emissions checked and only through that can the fuel trim be adjusted? Oh and it is a Golf with the later style electronic throttle body and coilpack. Thanks in advance! :) Quote Share this post Link to post Share on other sites
andy 0 Posted June 1, 2010 If you have checked for air leaks, I'd get the car checked out on Vagcom. It could be so many things. Quote Share this post Link to post Share on other sites
mattwelcer 0 Posted June 1, 2010 I have VAGCOM and there are no codes showing up at all. I also re-aligned the TB thinking this may have been responsible but no help either... Quote Share this post Link to post Share on other sites
mattwelcer 0 Posted June 2, 2010 OK so played around a bit more last night and found the following G127 - when it has anything less than 3.94 volts then the car idles normally, should this go to 3.94 volts then the car doesn't idle. This can also be influenced by turning the A/C on, it idles more stable. Could this mean the throttle body is broken? As I have tried the alignment several times. Each time successful but the idle always remains the same, stable then after a short period it fluctuates. :scratch: Quote Share this post Link to post Share on other sites
