resinstalled heads - car won't start
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
New MAF and new heads.. Part of the problem may be that you need to rescale the MAF table in the PCM.
The P0300 codes are a sure sign of a misfire. Are you sure that you dont have a cylinder misfire????
Lots of varables here. Just need to sort out the issues one by one. The MISFIRE is the very first one to solve!!!
BC
The P0300 codes are a sure sign of a misfire. Are you sure that you dont have a cylinder misfire????
Lots of varables here. Just need to sort out the issues one by one. The MISFIRE is the very first one to solve!!!
BC
Tech Contributor
Joined: Jan 2007
Posts: 19,475
Likes: 1,171
From: Dyer, IN
I agree Bill, I'm just thinking he need to restore the stock config (MAF and IAT), so he can eliminate the unknowns......you know those "adapter" harnesses are a crapshoot(he went from a 3 wire to 5 wire MAF).....as to whether they are pinned up correctly.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Get that OEM MAF reinstalled and eliminate that as one of the issues. Leave it there till you nail down the other issues. Then swap it out and see how the car runs.
Bill
Thread Starter
Drifting
Joined: Aug 2007
Posts: 1,495
Likes: 0
From: Homer Glen IL
Thread Starter
Drifting
Joined: Aug 2007
Posts: 1,495
Likes: 0
From: Homer Glen IL
latest results
After trying everything listed here I decided to pull the rockers I recently installed. I found this one:
and determined I mounted one rocker support upside down. This may have held a valve slightly open as it cut a groove in the rocker. Doesn't appear to be any other damage. If I still have a problem after installing the new rocker I will do a compression check to see if there was any valve/piston contact. The tech at Comp said he didn't think there was a clearance problem.
and determined I mounted one rocker support upside down. This may have held a valve slightly open as it cut a groove in the rocker. Doesn't appear to be any other damage. If I still have a problem after installing the new rocker I will do a compression check to see if there was any valve/piston contact. The tech at Comp said he didn't think there was a clearance problem.
Thread Starter
Drifting
Joined: Aug 2007
Posts: 1,495
Likes: 0
From: Homer Glen IL
Final report. Replaced damaged rocker along with the pedestal and bolt. Removed all rockers and reinstalled them correctly (pistons at TDC) and car fired up fine. Ran my best of 11.47 @ 118 on Sunday in 47 degree air. Thanks for your help guys.
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