|
|
04-06-2011
Sounds like you eliminated fuel and spark. How about vacuum leaks? They don't have to be big to effect idle.
What kind of car?
How many Miles?
What year?
supercharged or NA?
Has the lower intake gasket been changed?
if NA, has the upper composite intake been changed yet?
04-06-2011
Ok, sorry about not giving all the details. Car is a 1998 pontiac grand prix GTP with the L67 we have checked all the vaccume lines and there are no leaks found one a while back but fixed it for sure. The car has just under 147k miles on it. From what it looks like the previous owner put no LIM gaskets on so those should be ok. I may try and get a set of wires soon to see if it helps just trying to get a general view on what could be causing the misfire only at idle...
04-06-2011
Stock LIM gaskets are a none failure point with that many miles. As I understand it is normally a coolant leak but still something to checkOriginally Posted by Spartanzz
04-06-2011
yeah ill give it a look over looking at starting to mod so may get my hands on a ported SC and LIM just gatta find a good deal on um.
04-06-2011
If you try everything and that doesn't solve it.. swap the ICM. I know..it fires both towers etc etc. I've seen two cases where the icm didn't fire on one of the two cylinders. Odd eh?
04-06-2011
Well not too long ago my icm stopped firing on 3 and 6 so replaced that and before that happened o still had the idle misfire then got a brand new icm and idle misfire still there...I still drive the car every day so its not bad enough to destroy disability at this point its just getting annoying lol
| « Previous Thread | Next Thread » |
| Tags for this Thread |
| Bookmarks |
Bookmarks |
