u/Snowzylol

going to cut this down as shortly as i can but still going to be a long post. i am stumped and am now learning that the issue at hand is either above my paygrade or something that i am grossly overlooking. for starters i have a 1997 c5 corvette. about 6 months ago i pulled the car apart to build the motor and paint it. cam, heads, longtubes, intake, valvetrain etc. while the car was apart i found a good deal on a manual rear end out of a wrecked 02 car. so did that while the car was apart, swapped everything in, did all the wiring and everything there works fine. my issue at hand comes with trying to get the car tuned and running correctly. i started the car up fresh off the cam and it idled, rough, but it idled, ran just fine, great oil pressure, all of the above. i was stoked. i had some more work to do but just wanted to hear some progress. so took headers, intake, a couple other things off to do some more work, wiring, exhaust etc. now were going to flash a little forward. every time ive started the car since that point, it has backfiring insanely loud, has been running (seemingly) rich, and just will not run right, to make a long story short, got injectors, not that, comp test passes with flying colors, 220+ all cylinders (220+ is high for ls, its because of the cam specs) regardless the #s are consistient. it has spark, has good injectors, header had burned a little off the o2 plug the first time i started it and i thought it was fine, but just in case, spliced a new pigtail in and got new bosch o2s. has been thru 4 sets of plugs and fouled all of them out super super fast. my main issue is that currently 2 is misfiring non stop, acting as a dead hole, and the car will not idle. itll run if i pedal it but as soon as i let go it pops and dies. still backfiring some here and there but not as much since my tuner has had a look at it. he says 2 is showing a dead hole misfire and no one and figure out why. it has been comp tested, spark tested, brand new deka 80 injectors, new plugs, etc. took off valve covers, verified pushrod length and that intake and exhaust valves were moving fine, they were. i am stumped. only thing i can think to do next is leakdown test. these heads i bought off a mentor that i am almost certain are in good condition. he also happens to be my tuner and is my ex shop teacher and my best friends dad. he is notorious in our area for being THE ls guy/tuner and knows his stuff. has been busy and hasnt really had a chance to come take a look and i also dont want to be a bother. heads came pre springed with matching beehive springs to my cam and got brand new rockers, lifters, pushrods, etc, and properly installed. the one thing i cant get past is how it idled just fine the first startup and any time after that its been a backfiring mess and will not idle. i pulled the wire off cyl 2 while it was running and it ran the exact same as it was before i pulled the wire. essentially proving cyl 2 is a dead hole. at this point im thinking leakdown, harness to injector or coil, even though its getting spark. not sure man, could really use some advice from someone who knows a little more than me.

going to cut this down as shortly as i can but still going to be a long post. i am stumped and am now learning that the issue at hand is either above my paygrade or something that i am grossly overlooking. for starters i have a 1997 c5 corvette. about 6 months ago i pulled the car apart to build the motor and respray it. cam, heads, longtubes, intake, valvetrain etc. while the car was apart i found a good deal on a manual rear end out of a wrecked 02 car. so did that while the car was apart, swapped everything in, did all the wiring and everything there works fine. my issue at hand comes with trying to get the car tuned and running correctly. i started the car up fresh off the cam and it idled, rough, but it idled, ran just fine, great oil pressure, all of the above. i was stoked. i had some more work to do but just wanted to hear some progress. so took headers, intake, a couple other things off to do some more work, wiring, exhaust etc. now were going to flash a little forward. every time ive started the car since that point, it has backfiring insanely loud, has been running (seemingly) rich, and just will not run right, to make a long story short, got injectors, not that, comp test passes with flying colors, 220+ all cylinders (220+ is high for ls, its because of the cam specs) regardless the #s are consistient. it has spark, has good injectors, header had burned a little off the o2 plug the first time i started it and i thought it was fine, but just in case, spliced a new pigtail in and got new bosch o2s. has been thru 4 sets of plugs and fouled all of them out super super fast. my main issue is that currently 2 is misfiring non stop, acting as a dead hole, and the car will not idle. itll run if i pedal it but as soon as i let go it pops and dies. still backfiring some here and there but not as much since my tuner has had a look at it. he says 2 is showing a dead hole misfire and no one and figure out why. it has been comp tested, spark tested, brand new deka 80 injectors, new plugs, etc. took off valve covers, verified pushrod length and that intake and exhaust valves were moving fine, they were. i am stumped. only thing i can think to do next is leakdown test. these heads i bought off a mentor that i am almost certain are in good condition. he also happens to be my tuner and is my ex shop teacher and my best friends dad. he is notorious in our area for being THE ls guy/tuner and knows his stuff. has been busy and hasnt really had a chance to come take a look and i also dont want to be a bother. heads came pre springed with matching beehive springs to my cam and got brand new rockers, lifters, pushrods, etc, and properly installed. the one thing i cant get past is how it idled just fine the first startup and any time after that its been a backfiring mess and will not idle. i pulled the wire off cyl 2 while it was running and it ran the exact same as it was before i pulled the wire. essentially proving cyl 2 is a dead hole. at this point im thinking leakdown, harness to injector or coil, even though its getting spark. not sure man, could really use some advice from someone who knows a little more than me.

going to cut this down as shortly as i can but still going to be a long post. i am stumped and am now learning that the issue at hand is either above my paygrade or something that i am grossly overlooking. for starters i have a 1997 c5 corvette. about 6 months ago i pulled the car apart to build the motor and paint it. cam, heads, longtubes, intake, valvetrain etc. while the car was apart i found a good deal on a manual rear end out of a wrecked 02 car. so did that while the car was apart, swapped everything in, did all the wiring and everything there works fine. my issue at hand comes with trying to get the car tuned and running correctly. i started the car up fresh off the cam and it idled, rough, but it idled, ran just fine, great oil pressure, all of the above. i was stoked. i had some more work to do but just wanted to hear some progress. so took headers, intake, a couple other things off to do some more work, wiring, exhaust etc. now were going to flash a little forward. every time ive started the car since that point, it has backfiring insanely loud, has been running (seemingly) rich, and just will not run right, to make a long story short, got injectors, not that, comp test passes with flying colors, 220+ all cylinders (220+ is high for ls, its because of the cam specs) regardless the #s are consistient. it has spark, has good injectors, header had burned a little off the o2 plug the first time i started it and i thought it was fine, but just in case, spliced a new pigtail in and got new bosch o2s. has been thru 4 sets of plugs and fouled all of them out super super fast. my main issue is that currently 2 is misfiring non stop, acting as a dead hole, and the car will not idle. itll run if i pedal it but as soon as i let go it pops and dies. still backfiring some here and there but not as much since my tuner has had a look at it. he says 2 is showing a dead hole misfire and no one and figure out why. it has been comp tested, spark tested, brand new deka 80 injectors, new plugs, etc. took off valve covers, verified pushrod length and that intake and exhaust valves were moving fine, they were. i am stumped. only thing i can think to do next is leakdown test. these heads i bought off a mentor that i am almost certain are in good condition. he also happens to be my tuner and is my ex shop teacher and my best friends dad. he is notorious in our area for being THE ls guy/tuner and knows his stuff. has been busy and hasnt really had a chance to come take a look and i also dont want to be a bother. heads came pre springed with matching beehive springs to my cam and got brand new rockers, lifters, pushrods, etc, and properly installed. the one thing i cant get past is how it idled just fine the first startup and any time after that its been a backfiring mess and will not idle. i pulled the wire off cyl 2 while it was running and it ran the exact same as it was before i pulled the wire. essentially proving cyl 2 is a dead hole. at this point im thinking leakdown, harness to injector or coil, even though its getting spark. not sure man, could really use some advice from someone who knows a little more than me.

going to cut this down as shortly as i can but still going to be a long post. i am stumped and am now learning that the issue at hand is either above my paygrade or something that i am grossly overlooking. for starters i have a 1997 c5 corvette. about 6 months ago i pulled the car apart to build the motor and paint it. cam, heads, longtubes, intake, valvetrain etc. while the car was apart i found a good deal on a manual rear end out of a wrecked 02 car. so did that while the car was apart, swapped everything in, did all the wiring and everything there works fine. my issue at hand comes with trying to get the car tuned and running correctly. i started the car up fresh off the cam and it idled, rough, but it idled, ran just fine, great oil pressure, all of the above. i was stoked. i had some more work to do but just wanted to hear some progress. so took headers, intake, a couple other things off to do some more work, wiring, exhaust etc. now were going to flash a little forward. every time ive started the car since that point, it has backfiring insanely loud, has been running (seemingly) rich, and just will not run right, to make a long story short, got injectors, not that, comp test passes with flying colors, 220+ all cylinders (220+ is high for ls, its because of the cam specs) regardless the #s are consistient. it has spark, has good injectors, header had burned a little off the o2 plug the first time i started it and i thought it was fine, but just in case, spliced a new pigtail in and got new bosch o2s. has been thru 4 sets of plugs and fouled all of them out super super fast. my main issue is that currently 2 is misfiring non stop, acting as a dead hole, and the car will not idle. itll run if i pedal it but as soon as i let go it pops and dies. still backfiring some here and there but not as much since my tuner has had a look at it. he says 2 is showing a dead hole misfire and no one and figure out why. it has been comp tested, spark tested, brand new deka 80 injectors, new plugs, etc. took off valve covers, verified pushrod length and that intake and exhaust valves were moving fine, they were. i am stumped. only thing i can think to do next is leakdown test. these heads i bought off a mentor that i am almost certain are in good condition. he also happens to be my tuner and is my ex shop teacher and my best friends dad. he is notorious in our area for being THE ls guy/tuner and knows his stuff. has been busy and hasnt really had a chance to come take a look and i also dont want to be a bother. heads came pre springed with matching beehive springs to my cam and got brand new rockers, lifters, pushrods, etc, and properly installed. the one thing i cant get past is how it idled just fine the first startup and any time after that its been a backfiring mess and will not idle. i pulled the wire off cyl 2 while it was running and it ran the exact same as it was before i pulled the wire. essentially proving cyl 2 is a dead hole. at this point im thinking leakdown, harness to injector or coil, even though its getting spark. not sure man, could really use some advice from someone who knows a little more than me.

going to cut this down as shortly as i can but still going to be a long post. i am stumped and am now learning that the issue at hand is either above my paygrade or something that i am grossly overlooking. for starters i have a 1997 c5 corvette. about 6 months ago i pulled the car apart to build the motor and paint it. cam, heads, longtubes, intake, valvetrain etc. while the car was apart i found a good deal on a manual rear end out of a wrecked 02 car. so did that while the car was apart, swapped everything in, did all the wiring and everything there works fine. my issue at hand comes with trying to get the car tuned and running correctly. i started the car up fresh off the cam and it idled, rough, but it idled, ran just fine, great oil pressure, all of the above. i was stoked. i had some more work to do but just wanted to hear some progress. so took headers, intake, a couple other things off to do some more work, wiring, exhaust etc. now were going to flash a little forward. every time ive started the car since that point, it has backfiring insanely loud, has been running (seemingly) rich, and just will not run right, to make a long story short, got injectors, not that, comp test passes with flying colors, 220+ all cylinders (220+ is high for ls, its because of the cam specs) regardless the #s are consistient. it has spark, has good injectors, header had burned a little off the o2 plug the first time i started it and i thought it was fine, but just in case, spliced a new pigtail in and got new bosch o2s. has been thru 4 sets of plugs and fouled all of them out super super fast. my main issue is that currently 2 is misfiring non stop, acting as a dead hole, and the car will not idle. itll run if i pedal it but as soon as i let go it pops and dies. still backfiring some here and there but not as much since my tuner has had a look at it. he says 2 is showing a dead hole misfire and no one and figure out why. it has been comp tested, spark tested, brand new deka 80 injectors, new plugs, etc. took off valve covers, verified pushrod length and that intake and exhaust valves were moving fine, they were. i am stumped. only thing i can think to do next is leakdown test. these heads i bought off a mentor that i am almost certain are in good condition. he also happens to be my tuner and is my ex shop teacher and my best friends dad. he is notorious in our area for being THE ls guy/tuner and knows his stuff. has been busy and hasnt really had a chance to come take a look and i also dont want to be a bother. heads came pre springed with matching beehive springs to my cam and got brand new rockers, lifters, pushrods, etc, and properly installed. the one thing i cant get past is how it idled just fine the first startup and any time after that its been a backfiring mess and will not idle. i pulled the wire off cyl 2 while it was running and it ran the exact same as it was before i pulled the wire. essentially proving cyl 2 is a dead hole. at this point im thinking leakdown, harness to injector or coil, even though its getting spark. not sure man, could really use some advice from someone who knows a little more than me.