NJFBOA - Home of New Jersey's Camaros and Firebirds - View Single Post - Failed inspection again.. have a question..

Stevoone · 10-18-2008, 10:35 PM

I had a similar problem with a Cadillac a while ago, couldn't get it to pass the I/M test. turns out when I was driving the car it would misfire 1 time on the entire 10 mile test drive. The 1 misfire was enough to stop the I/M test but not enough to set a misfire code. I think it was the EVAP test I was having problems with. Ended up replacing the spark plug and wire for the cylinder that had the misfire and it passed the I/M test about 1/2 mile into the test drive.

10-18-2008, 10:35 PM	#14
Stevoone Join Date: Mar 2007 Location: NJ Posts: 540 iTrader: (2)	I had a similar problem with a Cadillac a while ago, couldn't get it to pass the I/M test. turns out when I was driving the car it would misfire 1 time on the entire 10 mile test drive. The 1 misfire was enough to stop the I/M test but not enough to set a misfire code. I think it was the EVAP test I was having problems with. Ended up replacing the spark plug and wire for the cylinder that had the misfire and it passed the I/M test about 1/2 mile into the test drive.