Hello everyone......

Actually checking this out for a friend ....
2000 Prelude with a 3 litre VTech engine. Everything works like a charm when the engine is cold, once engine warms up it runs very rough or "rich" if you wish.

Any thoughts on what this could be.

There are no codes or nothing to hint as to what it might be.


Thanks a ton

 

i didn't know there was a 3 Liter prelude motor! anywho, it could be several things; o2 sensor(s), ignitor, intake temp. sensor, coolant temp. sensor, can u be more specific on how it runs rough?