Question about 1986 Pontiac Firebird

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V6 86 firebird won't start, tried starting fluid

I just bought the car. it stays on so long as i keep opening the throttle but only for a few seconds. when this happens i hear a knocking like one of the cylinders it out. it was running fine before the previous owner left town and had her sitting for a year.

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Since it is a older car might invest in wires, plugs,cap and rotor, then set the choke on the probably Rochester 2 bbl. the knock you hear might be a lifter that has lost its prime, another words once you get it running for a few minutes it will prime up and stop clicking

shack

Posted on Apr 15, 2009

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Could be a stuck valve. That would explan the knocking

Posted on Jan 31, 2009

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Disconnect the plug to the cold start injector. Even if you have an issue with the engine running then dying after a few seconds after doing this, if you don't smell fuel after disconnecting the cold start injector and try to restart it, the cold start time injector time switch may be failing.

Buy a can of starting fluid and have someone start the engine then spray short bursts of the fluid around all the intake fittings. If spraying the fluid in any particular area keeps the engine running, I'd start looking for leaks around that area.


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... you smell fuel after trying to re-start when it dies.


Disconnect the plug to the cold start injector. Even if you have an issue with the engine running then dying after a few seconds after doing this, if you don't smell fuel after disconnecting the cold start injector and try to restart it, the cold start time injector time switch may be failing.


Buy a can of starting fluid and have someone start the engine then spray short bursts of the fluid around all the intake fittings. If spraying the fluid in any particular area keeps the engine running, I'd start looking for leaks around that area.


It does sound like an AFM or COR issue considering it dies after a few seconds, but the fuel smell when trying to restart the engine may be a separate issue that needs corrected / isolated first.

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