Hi I am a new member. Purchased a 1994 Corvette couple of years ago.................. Love it !

I am experiencing a problem with a backfire, which sounds like it is coming from under the car, when I accelerate.
Also the " check engine "light comes on only when I accelerate up hill or it is under load.

A local garage have checked the codes and all seems well. Just changed the EGR Valve but that did not help.
Could it be that my Catalytic Convert/s are plugged ?

Anybody run into this problem before ?

 

My experiance with a plugged Cat, is a loss of power. Ya just can't get the exhaust gasses out fast enough. Try exhaling through a small straw, then use a toilet paper tube,you'll get the idea.
"Backfire" and "outfire" are usually the result of the timing being off.

( a collapsed lifter, weak valve spring, bent push rod,or a warped valve do goofy things too )

Watch oil pressure and check oil level. My suspect on the engine light during accelleration and a load.

 

Oh ya, Welcome to CF!

 

Thanks for the Welcome and the tip.
Going to give the Vette a good tune up in the spring.

 

Welcome Garry123,

As you have already seen this site is waesome and the people are even better when it comes to help. Enjoy your stay with us.

 

Don't forget to change oil, filters ( air, oil and fuel ), top off tranny and rear. Complete chasis lube, front and rear. Top off all other fluids too. P/S, rad/antifreeze, brake fluid, and washer. Ya might think about flushing your cooling system and replacing with fresh antifreeze anda new thermostat. Same temp rating, just a new one.Inspect all lines and hoses for signs of weakness, cracking,or leakage.

Can't wait to see pics.

 

Good advise but the first thing I did was flush cooling system, replace Thermostat, replace air filter and change oil ( Synthetic of course Mobil 1 ).
I like the idea of tuning the puppy up.

Thanks Guys ............ this is going to be a great site to learn more about my Vette.

 

Just throwin' stuff out there. Sometimes we don't think to do some things. Heck, I forget stuff all the time.

 

Me too, Memory loss comes with........uh......what was it....hang on,...I'll remember.....umm......Oh yeah!.....no wait, ...that's not it ..........Damn...I hate that......


Welcome to the site. Don't forget to wave. Cheers

 

Uh,......hate what?