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The Terminator
Engine/Tuning
is this a fuel issue? or an air issue? how should i diagnose
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<blockquote data-quote="P49Y-CY" data-source="post: 16358897" data-attributes="member: 10216"><p>allright this should be my final post in this very long running thread because the car is finally back up and running again, and i wanted to say what the fix was in case it might help anyone in the future.</p><p></p><p>but i am still very confused about it because it doesn't make any sense to me. it was the fuel pumps.</p><p></p><p>what makes no sense is that six months ago when i first started this thread, the fuel tank from my coupe was one of the very first items that i swapped out. the car still stalled out after 30 minutes (like it had been doing with every other part i tested). so how in the hell could replacing the fuel pump assembly now make any difference at all? i don't get it! also, remember that the pumps primed with key on, and also ran when full power was applied to them... so i really thought i was correct ruling out the pumps.</p><p></p><p>but this week i threw in the towel on my diy attempts and brought it to my tuner. (after all it was coming up on being broken for six months and i had just renewed the registration on the car right before it crapped out lol) anyway he hooked up the gauge, asked me to start it, and immediately said fuel pumps. i told him the history but he still said we at least needed to start there. i was thinking okay, give it a try, but i doubt it will fix it. i couldn't believe it when he called the next day to say the car is running good and that he double checked the a/f on his dyno and it even made a little more power than when i first got it tuned years ago! today i drove it home and it is running fine - almost like nothing ever happened...</p><p></p><p>so even though i am scratching my head about it, i'm real happy that the car is fixed. and many, many thanks to all you folks who offered all your good help and advice.</p><p></p><p>cheers -</p></blockquote><p></p>
[QUOTE="P49Y-CY, post: 16358897, member: 10216"] allright this should be my final post in this very long running thread because the car is finally back up and running again, and i wanted to say what the fix was in case it might help anyone in the future. but i am still very confused about it because it doesn't make any sense to me. it was the fuel pumps. what makes no sense is that six months ago when i first started this thread, the fuel tank from my coupe was one of the very first items that i swapped out. the car still stalled out after 30 minutes (like it had been doing with every other part i tested). so how in the hell could replacing the fuel pump assembly now make any difference at all? i don't get it! also, remember that the pumps primed with key on, and also ran when full power was applied to them... so i really thought i was correct ruling out the pumps. but this week i threw in the towel on my diy attempts and brought it to my tuner. (after all it was coming up on being broken for six months and i had just renewed the registration on the car right before it crapped out lol) anyway he hooked up the gauge, asked me to start it, and immediately said fuel pumps. i told him the history but he still said we at least needed to start there. i was thinking okay, give it a try, but i doubt it will fix it. i couldn't believe it when he called the next day to say the car is running good and that he double checked the a/f on his dyno and it even made a little more power than when i first got it tuned years ago! today i drove it home and it is running fine - almost like nothing ever happened... so even though i am scratching my head about it, i'm real happy that the car is fixed. and many, many thanks to all you folks who offered all your good help and advice. cheers - [/QUOTE]
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The Terminator
Engine/Tuning
is this a fuel issue? or an air issue? how should i diagnose
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