car was runing good then the check eng lite came on and it wont rev pass 4k and when i jump to see the codes it stays lit up

 

Bad ECU, or short in the CEL/service connector circuit.

 

If you jump the service connector and the check engine light stays on (constant) than it doesn't have an error to report. I would reset the ecu (pull the 7.5A Backup fuse from the under-hood fuse box for 20s) and drive it again. If it does it again, shut it off, jump the connector, and turn the ignition on and see if it flashes.

Sounds to me like a timing problem.

Some info about your car would be helpful - year, engine, model, etc

 

Or that.....

 

its a 92 dx with a b16a and it ran great till last nite and i even put a new chip in and it did the same so im thinkin ecu like ppl are sayin