Question about 1998 Pontiac Firebird

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I have a '98 Pontiac Firebird and I was having an overheating problem with about a month and a half ago, so I got the waterpump, heater hose, and fans replaced on it and it started running fine. Well, the other day it started smoking I didn't see the temp guage go up, but everytime I start it it trembles a little for about 5 mins or so and smells of a strong oil or gasoline smell. What could be wrong with it? And the fuel filter was also replaced with the other parts.

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might just be a loose heat shield or broken exhaust hanger

Posted on Jun 18, 2008

Healeyman
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SOURCE: 2002 mazda miata mx5 has strong gasoline smell in

The fill pipe is right back there. Check to see if a hose has been damaged. Check the spout area, is there a overflow pipe or a seam that could be leaking into the trunk?

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SOURCE: 91 gti 8valve overheating problem blows coolent smoke on the..

A bad radiator or water pump leaks the coolant in the engine compartment or on the ground. A heater core sends a coolant smell through the vents or leaks onto the passenger side floor. I hope this helps.

Posted on Mar 15, 2010

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SOURCE: 98 pontiac firebird v6 3.8 liter, keeps

When you said you replaced all the cooling system parts, you mean the raditor, the hoses, the water pump,the therostate, the raditor fan and it's relays and sensers. If you've done all of this and you correctly purged all the air out of the system then The engine can be making too much heat another way. The coolant temperture senser can say that the engine is cooler than it really is ( makes a rich mixture, to warm the engine) The therostate may be installed unside down or is open all the time or is missing. ( the therostate needs to make the car get up to 200degrees F or the raditior may not get hot enough to remove enough haet to cool the engine. ( hot is good too hot or too cold is bad). Let's say all the cooling system work is good and you did'nt mix more than one kind of antifrezze ( they jel up and not cool.) The exhaust can be stopped up ( causes low performance too) Take out the oxagen senser and connect a pressure gauge ( leave the snser plugged in and grounded) If the pressure goes any higher than 5 Lbs. reving it or anytime then you looking for a clog. A good system revved up and heald staedy should show a vacume. The timing can be wrong ( low performance too) The timing chain can skip time and the measureed compression will be lower that 150 LBS. With the chain skipped the ingtion timing will be slow and that will cause overheating all by it'self. The engine may need an oil change, Gas in the oil from short trips and running too cold sometime. Overheating will rurine the mototr oil and it being bad will make the engine heat. The engine turning hard ( turning the engine by hand you should feel 3 compression shrocks per turn and it should turn easy except as it pressureizes each cyclinder, ( they should all feel the same) the oil should look clear and black, not brown. If it's some other color, coolant may be getting in the oil, The exhaust should'nt smell sweet ( antifreeze leaking into the combustion ) with the car running and the cooling system full with the cap off it shouldn't bubble or steam come out ( it tells their is a leak in the engine to the coolant and it'll blow bubbles in the coolant and the hot exhaust will heat the coolant more than the raditor will remove. It certainly should'nt bubble at all started cold and full.

Posted on Sep 28, 2010

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