All Cylinder Misfire after LIM Change and Vac Leak?

[Lawngoose]

Guys, I did a LIM change tonite (watched dubob's video several times) and now im having issues... im frustrated tonite and calling it quits but I want to see what you guys think I should do next. I assume I have yet another vac leak due to my LTFT's... but the lim gasket that was installed was the oem and in bad shape. I got a metal one.

First Scan:
RACETRACK_1-31-2009_10_38_48_P from lawngoose -- Scan Depot dot net

Second Scan: (I reset LFTF's on this one)
RACETRACK_1-31-2009_10_52_26_P from lawngoose -- Scan Depot dot net

I am showing misfires on all cylinders, I double checked my wires. 1,3,5 in front and 2,4,6 in rear.

Can anyone help point me in the right direction?

Thanks,
Matt

[TDCRacing]

Typically you will always show misfires if you start the misfire scan on HPT. Is the ses light on becuase of it?

[Lawngoose]

No codes are thrown. I use DHP, but I assume it could be the same issue.


However, today when I cranked the car I got a loud whistling on idle..give it gas.. it goes away. Vac leak right?

I sprayed every line i could, no change with the sound. But when I sprayed the lever coming out of the s/c going to the BBV... it stopped.

Anyone ever encountered this one?

[TDCRacing]

Yep. gimme a second.

[TDCRacing]

http://www.grandprixforums.net/f18/h...oost-9745.html


Let me know and i will charge you the same as the other guy...just shipping..just read the post it will explain everything

[Sabrewings]

Typically you will always show misfires if you start the misfire scan on HPT. Is the ses light on becuase of it?

I've never seen a misfire while scanning my vehicle. Whether it's with the DHP PT or my Aeroforce gauge.

[TDCRacing]

Now did you mean the lever comming out of the BBV? Or the rod comming out of the S/C?

The rod comming out of the BBV uses a rubber boot to make sure there are no leaks.And that is what that guy was having trouble with. That's why i sent him a new BBV

[Lawngoose]

The Rod coming out of the s/c

[TDCRacing]

I've never seen a misfire while scanning my vehicle. Whether it's with the DHP PT or my Aeroforce gauge.

There was a reason that was happening. I can't remember but i think it was because of the XP cam I had. though he had an xp cam also. But I guess not.

[Lawngoose]

There was a reason that was happening. I can't remember but i think it was because of the XP cam I had. though he had an xp cam also. But I guess not.

Stock cam.

I just replaced all the vac lines that I could get to and inspected all the rubber t's.

But let me ask you guys this. When im spraying carb cleaner looking for leaks, I know I should monitor LTFT's. But since im pegged at 16.4 ... would they change? Or should I reset them before spraying?

[TDCRacing]

I just looked at my gen5 blower and all there is to seal the rod that goes through the supercharger is some roller bearings.

Does not seem like you should have a vacume leak there. If you plug the leak they should go back to where they belong and not stay pegged

[Lawngoose]

Update: Had a small piece of the old gasket left on the s/c, removed it and drivability is restored... However, still have a vac leak. We checked the all around the gaskets LIM/UIM and didnt not find one.

I plan to reseal the EGR plate, again. To see if that fixes it.