Question about 1987 Pontiac Fiero

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Overheating my fiero's exhaust manifold nearest me when i open the hatch gets orange hot two or three minutes after i start it and its seem to be making the car over heat gradually especially on the streets and not as much on the freeway.can you please help me.its a beautiful machine and i dont want to ruin the engine.v6 gt 5 speed.thanks.

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If the exhaust is getting red replace it with one that can dissipate more heating.

Posted on Sep 10, 2008

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If that is dual exhaust and has seperate catylatic converters.... check that the one on that side is not plugged up.


Posted on Sep 10, 2008


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1 Answer

2000 gmc 3500hd 7.4 after the trucks gets up to temp it starts back firing and sounds like a spark plug blew out .

Simply a 'spitball' guess, but it almost sounds like it could possibly be an exhaust leak either where the manifold mounts to the head or a cracked exhaust manifold.

I'm not sure if that engine came from the factory with exhaust manifold gaskets or not.

Crack or gap is closed while cold or cooler and opens up the crack or gap as the manifold get warmer or hot.

Hope this helps.

Jul 28, 2016 | GMC Cars & Trucks

1 Answer

Why the exhaust manifold turn on red?

Ok I beleive your asking why your exhaust manifold is turning red. If this is the case you probably have a blockage in your manifold, or the cat is clogged. somewhere the is an obstruction not allowing the exhaust gasses to escape properly and the temperature just keeps raising. You need to fix this right away! If I were you I would take the exhaust apart and clean it, or just replace it, then take off the manifolds and clean them out, if you do not find the obstruction then the cat is clogged and needs replaced!

Oct 12, 2012 | 1986 Pontiac Fiero

2 Answers

Overheating coolant boiling out into reserve tank

you have a blown head gasket.. doesn't have to have coolant in the oil for a blown head gasket... if hoses are rock hard when running then you have exhaust leaking into the coolant via a blown head gasket...

Jul 14, 2012 | 1998 Plymouth Breeze

1 Answer

Is it normal for v6 fieros exhaust manifolds to glow red at night

Yes, they are made of a very thin steel, so watch for cracks in them.

When the time comes, here is a good source for parts:

Hope this helps.

Oct 10, 2010 | 1986 Pontiac Fiero

1 Answer

I have a 1988 Ford F150 fuel injected. I can run the truck, however when I shut it down after driving it for while, it does not want to start. If I let it sit for an hour or so after it cools down alittle,...

Sounds to me like the starter is getting overheated. Have you changed the starter lately? Did you reinstall the starter heat shield between the starter and exhaust manifold? Those exhaust manifolds can reach temps of over 800 degrees. I don't smoke, but i lit a cigarette on a hot exhaust manifold before. These starters need to be protected from exhaust heat. Check and see if the starter heat shield is in place, if not, wrap the starter in some heat resistant material, Good luck, Gary

Jul 27, 2010 | 1988 Ford F 150

2 Answers

1986 Pontiac Fiero V6 2.8L rebuilt..I started it up, within 45 seconds the exhaust manifolds turn bright red and start burning up. I triple checked the timing, it is idling a bit higher than normal still....

That is usually from a clogged catalytic convertor and/or the pre-cat or collector that sits in between the manifold and the cat. If you left the pre-cat on, remove it and see what the result is.

Jun 03, 2010 | 1986 Pontiac Fiero

2 Answers

Saturn L Series won't start when starter gets hot. Why is starter getting hot?

Bad ground or its too dirty to make ground. or its a bad starter.

Apr 28, 2010 | 1997 Saturn SC

2 Answers

Where is the oxygen sensor located on a 1987 fiero 4 cylander

Either in the exhaust manifold or in the exh pipe directly under the manifold.

Dec 14, 2009 | 1987 Pontiac Fiero

1 Answer

86 fiero thermostat and exhaust problem

The thermostat is held in place by a rubber seal around it and the access cap. One of those is allowing the thermostat to move freely.

The bright red manifolds indicate that combustion is occurring in the exhaust manifold. This is usually a retarded ignition timing issue. Check your timing and see if that helps the hesitation at idle.

Good luck,

Rebel Faggioli

Dec 20, 2008 | 1986 Pontiac Fiero

1 Answer


The place to start is the thermastat. Sounds like it is probably stuck closed.

Oct 10, 2008 | 1986 Pontiac Fiero

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