When I bought my 94 Trans Am, my fuel cap was broken so it doesn't seal. Is that bad? Just wondering if my fuel is evaporating or something. I know it eats alot, and needs plenty of new parts. But every other car I see gives off a hiss when they go to open their cap and mines always open.

Thanks in advance.

 

I would think for the $10 that it costs to replace it, go for it.

 

dont these cars throw a ses light if the gas cap isnt sealed tightly?

 

not a 94(or a 95 for that matter)

only the OBD 2 cars throw the code

 

Most cars will show a SES code for a loose gas cap and if you have Emission tests the broken gas cap will fail you.

 

the only vehicles that test the evaporative emmisioons system are obd2 equipted(or higher)

 

You haven't been tested in California,lol!
If the cap doesn't pass the test you fail. If it's suppose to seal it better seal. I have a locking type cap on mine,and I have to stick the stocker on for testing,because they did not come from the factory with a locking cap (even if it works)they will fail you. It's Dumb,but that's California.

 

I never said a bad gas cap would pass a emissions test, I said a bad gas cap would only set a DTC on cars equipted with OBD2 diagnostics(some 95's, all 96 Domestic cars, most light trucks)

 

Sorry I wasn't saying you were wrong ,I was just reffering to this part of you statment.