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| 1986 Fiero SE Won't Run (Page 1/7) |
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72and86
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SEP 17, 02:13 PM
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1986 Fiero SE V6 Won't Run. My mechanic friend and I just replaced the fuel filter and fuel pump in the gas tank. We have pressure at the rail. What happens is that the car starts right up and dies 2 seconds later.
But...
With my buddy in the engine bay working the throttle we can keep the engine running indefinitely but as soon as he lets go of working the throttle the engine dies.
We have checked the idle air control valve and its spotless.
Obviously we have fuel and spark. He thinks its a vacuum leak but cant pin point it.
Any ideas? We're stumped/ (One early attempt he plugged a vacuum hose on the middle back (top) of the engine and it ran but high idle. We couldn't figure out where it goes? Maybe brake booster? Anyway we tried that agin and it didnt seem to help.)
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ArthurPeale
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SEP 17, 05:46 PM
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if you put it into diagnostic mode does it run?
Have you checked the timing?
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72and86
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SEP 18, 01:12 PM
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| quote | Originally posted by ArthurPeale:
if you put it into diagnostic mode does it run?
Have you checked the timing? |
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Ah it appears to blink code 22 and 44 if I read this right.
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Gall757
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SEP 19, 10:42 PM
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| quote | Originally posted by 72and86:
Ah it appears to blink code 22 and 44 if I read this right. |
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44 could be a bad 02 sensor or a leak in the exhaust manifold. 22 is TPS. Both could contribute to your problem.
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Xenoblast
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SEP 20, 01:36 AM
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| quote | Originally posted by 72and86:
if I read this right. |
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He meant actually running the engine while the diag ports are grounded. This is how you set timing. engine should be warmed up when checking timing.
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Forrest
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SEP 20, 11:42 AM
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Mine did this after replacing a broken injector. I had forgot to plug the vac lines into the intake and map sensor on the passenger side of the intake. You may want to just check those lines.
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AldisFiero
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SEP 23, 04:53 PM
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Clean up all throttle body butterfly valves and contact surfaces. Not with a spray can of whatever. Make them clean. [This message has been edited by AldisFiero (edited 09-23-2021).]
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buddycraigg
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SEP 25, 09:26 PM
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I think your IAC is not working.
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72and86
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SEP 26, 11:25 AM
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| quote | Originally posted by buddycraigg:
I think your IAC is not working. |
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Nope. Just put a new one in and no change. Engine starts revs high and dies.
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buddycraigg
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SEP 26, 03:30 PM
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What made you want to replace the fuel pump?
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