Saturn ION Red Line Forum : “problem”
problem
I own a 2004 saturn ion redline it has a problem some where ok I have ahd it to the dealer twice now and thhe problem is still there ok what the car is doing the idle is going up to around 1500 and then it is dropping down to about 300 somtimes the car even stalls now it does not do this all the time but it is always when i am sitting still the dealer said it was the thermost and they replaced it and it is still doing the same thing the print out on the codes said there were several EVAP codes what is a EVAP code? I was wondering if you could give me any help toward the right way to fix this problem?
Evap codes are the evaporative emissions system, a closed system that returns evaporated fuel vapors to the fuel tank. It's possible you have a vacuum leak in that system which is causing problems at idle. There's no reason the thermostat would cause any of that. Throttle position sensor is a def. possibility and get those Evap codes checked out with a Miller smoke machine or similar device to see if there are any leaks.