Hello out there!
I've been a lurker since I bought my Mustang last year. I am greatly appreciative of all the information available on this website. However, after spending significant amounts of time trying to figure out my "Bucking Mustang" I have found no answers.
First off, here is the info on the mustang:
2003 Mustang GT, Kenne Bell Supercharger with Cobra MAF @ 9.5ish PSI with a dyno tune. 65,000 miles
This car was running great...until it grenaded on the road racing track in Utah in October. The car was running EXCELLENT up until then. The engine blew without warning, with no early indications (burning oil, losing coolant, etc). I was going down the long straight with the pedal down about 7/8 (not all the way in as a corner was coming up quite quickly). While performing the autopsy, I found several small pieces of a piston in the pan as well as pieces of the rod(rod went through cylinder wall). I have since built up an aluminum block and reinstalled the engine. (It is studded on the bottom and top end, complete forged internals) Thinking that the engine blew because of a heat-stress problem, I had the supercharger cleaned up by Kenne bell and we then re-installed the engine. After performing the final checks, I attempt to start the car and...it runs terribly. (?) Just to try, I re-load the stock program onto the car and find that the mustang now runs "fine", but I don't dare drive it anywhere. After much research on this site, I decided to replace the MAF (I cleaned the original, with no change at all). Installing a new MAF significantly helped the car run on the dyno tune, but now the car stutters and misses at random times. The stutters or misses are so significant at times the Traction Control will come on while driving. I have checked the coils and the plugs, with both appear fine. I have had the alternator tested and no issues were found. The EGR valve appears to be functioning fine (Doesn't seem to be stuck). I have searched and searched for vacuum leaks, and have not found any.
Thus, after a loooooooong post, this is where I'm at. I have no idea where to go next. With the stock tune, regardless of MAF, the car runs fine. With the aftermarket, I have random misses on different cylinders. No engine codes to be read...nothing. Anybody have any ideas out there?
I've been a lurker since I bought my Mustang last year. I am greatly appreciative of all the information available on this website. However, after spending significant amounts of time trying to figure out my "Bucking Mustang" I have found no answers.
First off, here is the info on the mustang:
2003 Mustang GT, Kenne Bell Supercharger with Cobra MAF @ 9.5ish PSI with a dyno tune. 65,000 miles
This car was running great...until it grenaded on the road racing track in Utah in October. The car was running EXCELLENT up until then. The engine blew without warning, with no early indications (burning oil, losing coolant, etc). I was going down the long straight with the pedal down about 7/8 (not all the way in as a corner was coming up quite quickly). While performing the autopsy, I found several small pieces of a piston in the pan as well as pieces of the rod(rod went through cylinder wall). I have since built up an aluminum block and reinstalled the engine. (It is studded on the bottom and top end, complete forged internals) Thinking that the engine blew because of a heat-stress problem, I had the supercharger cleaned up by Kenne bell and we then re-installed the engine. After performing the final checks, I attempt to start the car and...it runs terribly. (?) Just to try, I re-load the stock program onto the car and find that the mustang now runs "fine", but I don't dare drive it anywhere. After much research on this site, I decided to replace the MAF (I cleaned the original, with no change at all). Installing a new MAF significantly helped the car run on the dyno tune, but now the car stutters and misses at random times. The stutters or misses are so significant at times the Traction Control will come on while driving. I have checked the coils and the plugs, with both appear fine. I have had the alternator tested and no issues were found. The EGR valve appears to be functioning fine (Doesn't seem to be stuck). I have searched and searched for vacuum leaks, and have not found any.
Thus, after a loooooooong post, this is where I'm at. I have no idea where to go next. With the stock tune, regardless of MAF, the car runs fine. With the aftermarket, I have random misses on different cylinders. No engine codes to be read...nothing. Anybody have any ideas out there?
