car want go and hesitates someone help

[chevyman39452]

My 2000 grand prix has been giving me problems when you first crank it up it runs good but after you go around 15-30 miles it starts hesitating and not wanting to go like its running out of gas but if I stop and cut it off and let it sit a few minutes I can go for about 5-10 miles before it starts doing it again can anyone help me figure this out thanks

[Bio248]

clogged cat.

[MoarkatsINmuhtrailer]

that^^

[Eric Whitter]

It could be o2s thas what happened to my old sho

[ricksgpgtcolleen]

Cat, but O2 MIGHT be the culprit. Check the cat. If it is the cat, be sure to check out what made it fail. Oil? Physical damage? Fuel? Catalytic convertors don't just fail like that.

[ctracer]

arent our cats prone to clogging?? lol

[SlowNA06]

arent our cats prone to clogging?? lol

A 13-year old cat? Well... maybe. Cats last ~150,000 miles. At 12,000/year, you're at 156,000 miles.

[chevyman39452]

If it was the cat why wouldn't it run like that all the time instead of 15-30 miles of driving

[TLSheff]

Heat causes expansion... its a honey comb design that is probably getting clogged up, expansion causes the air way be blocked even more.
Now, not that this may or may not be the problem, but if you have recently changed the plugs you may re-check them, I once had one crack and it didn't set off the miss-fire code but shuddered something fierce once the engine got warmed up to operating temp. just a thing to consider, and its free to check.

do you have a check engine light on? if so, get it scanned and we can really go from there. Write the code(s) down, and let us know which ones it/they is/are.