1984 Pontiac fiero wont start


Asked by Apr 16, 2017 at 04:26 PM about the 1984 Pontiac Fiero SE or Indy

Question type: Maintenance & Repair

I did the spark plug and wire on my Fiero
then i try to turn it on. The engine made a
loud popping sound like a gun shot. So my
dad fixed it and now it still don't want to turn
on. It sounds like it want to turn on but it
doesn't. I hear the starter, it got gas, the
battery is new and still nothing but wen i try
to turn it on i smell gas. I don't know was

9 Answers


Need a little more info, is your car fuel injected or naturally aspirated? And as far as your battery being brand new I would still check it I've bought batteries that came off the shelf bad. It happens.

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So far i tryed 3 different batteries. It still doesn't run Nd is TBI

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I don't understand your answer. Nd is TBI? I still need to know if it's FI or Naturally aspirated.

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Throttle body injection

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Run a compression test. The backfire sounds like a valve timing issue. If all cylinders test very low or zero it's jumped timing. HTH. -Jim

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Yea it backfire

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Have you tried putting the old sparkplug wires back on. To make sure it's not your new wires?

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Yea i have but the old one's nd nothing but my uncle told me it was the timing belt. But how can I tell if thats the problem??

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Compression test! If all cylinders test very low or zero it's jumped timing. You don't have a timing belt you have timing gears as pictured. Most likely the plastic "silent" camshaft gear has broken teeth and caused it to jump valve timing. If you don't have the compression test kit or can't borrow one from your local auto parts store (many stores lend tools) you can check the ignition timing with a timing light while cranking the engine. Ignition timing and valve timing are relative to each other. So if the valve timing gears have jumped, you'll see it as severely retarded (late) ignition timing. DO NOT move the distributor in an effort to adjust the timing so it will run!! Doing so only adjusts the IGNITION timing, NOT the VALVE timing!! If you determine it is the timing gears that have jumped don't buy the set with the "silent" camshaft gear. Get the all metal gear set. It'll last much, much longer!! Keep us posted! HTH. -Jim

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