273sunsetZ

Well like the title says, I've got a misfire at idle.. Scanned the car with Hptuners and it came back that cyl. 5 & 4 were misfiring, 5 about 3 times more than 4. I changed the plug wire on 5 and it didn't help, changed plug on 5 and nothing, so i gave the car alittle gas and the misfire disappeared.... Over 1600 RPM's and it goes away... Could someone enlighten me on what could be the problem.

bird2002

same problem. Anyone have an idea??

7420NW7TH

iTrader: (8)

This happened to me on my '99 Sierra pickup. Drove me crazy. It turned out to be the fuel pressure regulator located between the fuel rails was bad and causing the passenger side fuel rail fuel pressure to be low which caused it to misfire at idle. Check that.

Rhino

iTrader: (6)

That's weird, my cars are fine but I have the same problem on my Jeep.

Schwanke Engines

iTrader: (1)

Perform an injector balance test. That will tell you if it the injector or not.

273sunsetZ

Thanks guys... I'm gonna check into the fuel pressure regulator first, and if that isn't it It's going to the shop... I'm getting some work done to it next month anyways and the guy said if i didn't have it figured out by then, he'd do some more troubleshooting.