hey guys i just did an auto to manual trans swap and the second day after i got it done it threw a check engine light. it drives fine and there is no knocking or anything of that nature. i was wondering if anyone had any suggestions on what might have caused that. thanks alot.

 

You need a different ECU for manual transmission. If you still have the stock one that came with the automatic, it is expecting certain readings from the VSS that correspond to the gearing of the automatic.

 

I put a new 5speed ecu in from a 99ex that is why i dont understand whats wrong it drives perfect and the check engine like came 2 days later. should i take it to autozone and see if a code pops up? would that help the problem?

 

Yes. Use the usual procedure to diagnose. It may not be related to the transmission swap.

 

i'd clear it first to see if it wasn't just some random CEL

clear the code by resetting the ECU (remove backup fuse from under hood fuse box for like 5 minutes. plug it back in, start the car, don't touch the gas pedal at all, and let it idle for 5 minutes. after that, you're good to go)
see if the code comes back

if it doesn't come back... problem solved
it it comes back, get it scanned and go from there

 

OK great ill try that. thanks alot for all the help.

 

Pull the code at home using the jumper wire method (see link in my signature). Note the code and then clear it from the ECU.

 

ok so i just disconnected the ground cable from the battery and it cleared. thank you guys for the help.

 

good, hopefully the code stays away and doesn't throw again.