whammer33024
09-22-2009, 08:22 AM
Hey guys, got a problem here, looking for some help. So here is the rundown...
Got some new Rockers/pushrods/injectors/cam/valve springs. Installed them as done by a chitlton book in exact OEM specs, but adjusting the valves the way comp cams advises you to. Timing verified/sping lash verified twice.
Sent PCM to be Re-Programed to handle the cam/injectors. Got it back, fired up the car. Idled smooth, sounded great when reved up a bit, but once i took it for a drive, even under very partial throttle(25-40%) it would not want to go, sound as it wa backfiring, poping, odd. Just didn't sound/feel like it was getting timing or enough fuel.
I then rechecked valve clearance again, to no avail. I started it after rechecking Valve clearance and it seemed to miss. Shut it off, to a peek to make sure all plug wires were on, the turned it over agin. No start.....
So, I have spark, I have fuel, I have injectors pulse, on ALL cylinders. I have good fuel pressure. Showing MAP/MAF signals just fine. It seemed to backfire/pop out the exhaust when turning it over also.
So I went back to a stock PCM, Therfor going back to the stock injectors, Still no start. BUT, it will not Pop/Backfire out the exhaust anymore???? Seems to turn over fine, just not fire. I still have good spark/fuel Pressure and pulse on Injectors.
I'm Lost. Any Input will help.
BTW. This is a 97 Camaro LT1- The Re-program was done by MADTUNER-Ion Soltan- Cam is from Forced Induction.
Got some new Rockers/pushrods/injectors/cam/valve springs. Installed them as done by a chitlton book in exact OEM specs, but adjusting the valves the way comp cams advises you to. Timing verified/sping lash verified twice.
Sent PCM to be Re-Programed to handle the cam/injectors. Got it back, fired up the car. Idled smooth, sounded great when reved up a bit, but once i took it for a drive, even under very partial throttle(25-40%) it would not want to go, sound as it wa backfiring, poping, odd. Just didn't sound/feel like it was getting timing or enough fuel.
I then rechecked valve clearance again, to no avail. I started it after rechecking Valve clearance and it seemed to miss. Shut it off, to a peek to make sure all plug wires were on, the turned it over agin. No start.....
So, I have spark, I have fuel, I have injectors pulse, on ALL cylinders. I have good fuel pressure. Showing MAP/MAF signals just fine. It seemed to backfire/pop out the exhaust when turning it over also.
So I went back to a stock PCM, Therfor going back to the stock injectors, Still no start. BUT, it will not Pop/Backfire out the exhaust anymore???? Seems to turn over fine, just not fire. I still have good spark/fuel Pressure and pulse on Injectors.
I'm Lost. Any Input will help.
BTW. This is a 97 Camaro LT1- The Re-program was done by MADTUNER-Ion Soltan- Cam is from Forced Induction.