So its springtime. Here recently when I'm driving my car it will sound like its either back firing through the carbourator a little or out the exhaust a little. What would cause this. I have an 88 rs 2.8 v6

 

What kind of exhaust are you running? I remember when I tried to run straight pipes on my 92 Firebird. It backfired really bad and would shoot flames so bad it singed the leg hairs off my buddy. So I ended up putting a V-Force performance muffler with 20in by 3.5in resonators on it. No more backfire and sounds sweet!

 

Stock exhaust

 

How old is the exhaust? Is there any visible corrosion or damage? How old are the manifold gaskets? Might have a leak somewhere and its not getting enough back pressure. That might be causing it.

 

Its stock. So as old as the car is. And do you mean intake manifold or exhaust manifold

 

I was talking about the exhaust manifold gasket. The intake gasket should be fine unless the car was ever substantially overheated. You might want to take a good hard look at your exhaust as a whole. Not sure if you live in an area with salt on the roads or salt water in the air. Those could cause premature corrosion of the exhaust system components. Any substantial loss of exhaust pressure could be causing the backfiring issue.

 

Ok thanks for the info. Would there be any other reason?

 

1. Defective fuel or emissions system control components.
2. ignition timing incorrect.
3. faulty secondary ignition system (cracked spark plug insulator, faulty plug wires, distributor cap and/or rotor).
4. Vacuum lead at fuel injection unit, intake manifold or vacuum hoses.
5. Valve clearances incorrectly set, and/or valves sticking.

You asked lol. Was just trying to start of with the easiest to look at.

 

So I replace my filters. I also checked and I don't have an exhaust leak or a fuel leak. So I'm lost as to what it could be. Ive narrowed it down that it is coming out of the exhaust