longsword

i have a stock n/a and i can't for the life of me get it to accelerate. ive replaced just about everything i can think of, but still no avail. so do any of you have any suggestions on what to try?
it idles perfectly but as soon as you hit the gas it just dies.
ive already replaced the air flow meter and thats how i got it to idle so what else could be causeing this problem?

longsword

1988 n/a forgot to say that

classicauto

iTrader: (3)

Everything you did is.......................?

longsword

replaced map sensor
replaced mass air meter
tested wireing harness
replaced alternator
replaced spark plugs
replaced spark coils
checked fuel pressure- checked ok
replaced injectors



this is all on a freshly rebuilt engine

longsword

bump

DrifterDuo

iTrader: (4)

plugged exhaust maybe?

longsword

or could the ecu be bad?

J-Rat

iTrader: (2)

One good way to find out! Do the ECU test! Just pull your codes.

Wht90Rx7Conv

the exhaust thing is easy. Just unbolt it from the manifold and take it for a quick spin. Very loud. If that doesn't do it which I doubt it because you just rebuilt it check your codes for sure. You may have missed a connector, check that.

longsword

all the connectors are pluged in. i will try unbolting the manifold tomorow.

i dont have a code checker, too expensive.

DrifterDuo

iTrader: (4)

mine's still unbolted since i cant afford the other cat yet lol, i bought one new one and cut the second one off, it saddens me not to be able to drive it since its too loud for street driving. Let us know when you get it all fixed up, its a shame not to be able to drive since you have a fresh rebuild

DrifterDuo

iTrader: (4)

you dont need a codechecker, just a jumper wire to a connector grounded to the neg batt cable, i forget which connector exactly though, then the check engine light blinks if you have issues, i also forget exactly where the writeup is, maybe one of the others will be nice and give you a link, or you can just search, either way is good

J-Rat

iTrader: (2)

88.. No grounding of any check connectors..

You just need the TPS LEDs... DO a search for "pull codes" or somethinglike that

DrifterDuo

iTrader: (4)

oops, i have S5 i forgot his was 88

longsword

not haveing any luck in my searches. anyone know a way to test the ecu w/o a checker?

longsword

so i just realised im not fully describeing the problem. i can accelerate, i just cant keep it started. but everytime i do manage a steady idle if i hit the gas it dies, unless i tap the pedal and feather it up.

longsword

bump

longsword

bump

My5ABaby

iTrader: (7)

So if you hit the gas it dies unless you hit the gas? That doesn't make any sense.

longsword

no unless you feather the pedal and then after it hits a certian rpm you can hold it there

My5ABaby

iTrader: (7)

So, it will die if you don't hit the gas?

If so, I'd guess vacuum leak.

longsword

i have checked for vaccum leaks 3 times this thing is tight as a whistle

My5ABaby

iTrader: (7)

Whistles have huge holes that let out air.

longsword

think of your mouth as the intake and the hole in the whistle as the exaust. wistles dont work when they leak

My5ABaby

iTrader: (7)

Ah, that would be as tight as blowing a whistle. Not as tight as a whistle. Newho, I'll stop digressing.