car problem..any ideas?

[Donn2390]

Originally Posted by AONE

One quirk is when it hasnt warmed up it can drive any speed but when it is warm it goes to 40mph and no faster. if you do it wont respond until it falls back to 35 mph.

If it runs fine cold, and then goes to hell as it warms up, it is a plugged catalytic converter... Any mechanic or muffler shop can easily test it, but you are stating the classic symptom for a plugged cat.....

[Franklyn]

Good catch, Donn.

Coffee's on me if you're wrong.