so this is for 94gtho first and foremost, car is a 96 gt mustang with 120k on it. offroad x pipe, catback, ect, and a cop plug conversion, so there is not 2 coils and wires, its got the 8 cop conversion with the wiring harness you buy off the guy on corral
car was running great, no missfires, no knocking, ran great
we recently have done a pi swap. we bought 04 gt heads that were pulled off a running fine gt, we have an intake off an 02 gt, along with valve covers.
we did the swap, slowly and carefully. the heads came without the lash adjusters or rocker arms, that was a big complication on corral, the guys engine builder took them out, i ended up getting him to send money back because they were missing, so we used the lash adjusters, and rocker arms off his 96 heads.
we did the swap, everything seemed to go together correctly, we took time doign the timing, the only thing to note there was that one of the chain tensioners didnt seem to have as much tension as the other one. ill edit this post later and elaborate on that in more detail.
the car started right up and we drove it to get 93 octane fuel, seemed to run great. we got a couple codes, cyl 7 and 6 misfire, multiple cyl misfire, bank 2 too lean. so we did all new plugs (8) , and tried new coils on 7 and 6, still nothing
the car runs good, had an exhaust leak, but we fixed that. the car runs great, but idles rough, seems to have a slight miss. weve tried a different injector off another car, switching them, everything, still has a slight miss at idle. it wants to idle down and stumble and surge a little, sometimes it does it so bad it cuts itself off. the miss also causes this slight knock sound that might not be abnormal at all
we then did a compression check, using my gauge and the extension needed to get in there, all cyl's on the driver side bank has 150 psi, give or take 2 or 3 psi. we thought that might be low, so we tried cyl 2 on the other side, and it was about 155 IIRC.
weve tried spraying carb cleaner on all the places the intake manifold touches, all the vac hoses to see if theres a leak anywhere, none seem to exist.
Another thing to note is that the car smells like its running rich, makes your eyes water sort of, and its used a half a tank in less than 40 miles since the swap has been done. We have been driving it kinda hard, but still
it seems to always be a miss on cyl 6. we put noid lights in the plugs for all the driver side bank cop wires, and injector wires and they all fire. the only thing i need double checked is that when you put a noid light in cyl 6 injector plug, it pulses, then after 5 or 10 seconds it shuts off, but we figured that was the computer shutting that cyl off, is that right?
another thing to note is that there is a hair line crack (very small) on the intake manifold in the coolant jacket in the front, we have searched and found all that info about how people chase missfires and its an intake manifold problem. he knows he needs to get a new intake manifold, but was going to run this one for a month or two to hold us over.
any ideas? i think our next plan of action is to take the plug, coil, and injector off cyl 6, put them on cyl 5, and put all the cyl 5 stuff on 6 and see where the misfire code goes.
after that our only option is to pull the manifold, check the rails out, check how it seals and all that.
car was running great, no missfires, no knocking, ran great
we recently have done a pi swap. we bought 04 gt heads that were pulled off a running fine gt, we have an intake off an 02 gt, along with valve covers.
we did the swap, slowly and carefully. the heads came without the lash adjusters or rocker arms, that was a big complication on corral, the guys engine builder took them out, i ended up getting him to send money back because they were missing, so we used the lash adjusters, and rocker arms off his 96 heads.
we did the swap, everything seemed to go together correctly, we took time doign the timing, the only thing to note there was that one of the chain tensioners didnt seem to have as much tension as the other one. ill edit this post later and elaborate on that in more detail.
the car started right up and we drove it to get 93 octane fuel, seemed to run great. we got a couple codes, cyl 7 and 6 misfire, multiple cyl misfire, bank 2 too lean. so we did all new plugs (8) , and tried new coils on 7 and 6, still nothing
the car runs good, had an exhaust leak, but we fixed that. the car runs great, but idles rough, seems to have a slight miss. weve tried a different injector off another car, switching them, everything, still has a slight miss at idle. it wants to idle down and stumble and surge a little, sometimes it does it so bad it cuts itself off. the miss also causes this slight knock sound that might not be abnormal at all
we then did a compression check, using my gauge and the extension needed to get in there, all cyl's on the driver side bank has 150 psi, give or take 2 or 3 psi. we thought that might be low, so we tried cyl 2 on the other side, and it was about 155 IIRC.
weve tried spraying carb cleaner on all the places the intake manifold touches, all the vac hoses to see if theres a leak anywhere, none seem to exist.
Another thing to note is that the car smells like its running rich, makes your eyes water sort of, and its used a half a tank in less than 40 miles since the swap has been done. We have been driving it kinda hard, but still
it seems to always be a miss on cyl 6. we put noid lights in the plugs for all the driver side bank cop wires, and injector wires and they all fire. the only thing i need double checked is that when you put a noid light in cyl 6 injector plug, it pulses, then after 5 or 10 seconds it shuts off, but we figured that was the computer shutting that cyl off, is that right?
another thing to note is that there is a hair line crack (very small) on the intake manifold in the coolant jacket in the front, we have searched and found all that info about how people chase missfires and its an intake manifold problem. he knows he needs to get a new intake manifold, but was going to run this one for a month or two to hold us over.
any ideas? i think our next plan of action is to take the plug, coil, and injector off cyl 6, put them on cyl 5, and put all the cyl 5 stuff on 6 and see where the misfire code goes.
after that our only option is to pull the manifold, check the rails out, check how it seals and all that.
