I have an LS Vtec (full details can be found in my build thread in sig), it dies out when the car is hot, only when coming to a stop or at idle. The idle bounces around until it finally dies out. No CEL comes on when this happens.

The CEL does come on occasionally, but once the car is turned off the code is gone. I used to be able to get a code, which I had 10 and 8. I replaced the IAT sensor since then. If I try to retrieve the code with the engine running it does not work.

I'm thinking possible IACV not adjusted right? I do want to mention the shop that finished the engine wiring for me did not use the o2 sensor, simply left it plugged in and burnt the ECU to not need an o2 sensor.

Any thoughts?

 

Not much help in this neck of the woods

 

Check your timing. Does it shut off while you just let it sit there an idle?

 

Not when cold, just did timing and it's spot on. It only does this when it's been driven for a while.

Don't know why the CEL comes on and is cleared every time I turn the key off. I just beat on it and went into vtec and CEL came on at 6500rpm ish. Turned key off, turned back on and CEL was gone.

I'm at a loss

 

check some small things such as your fuel pressure how much psi are you at and check your screw on your throttle body and also you may have a faulty ecu. try a virgin p06 or sumthin like that and see how it runs. it can be a number of things thats why no ones answered you. ive seen bad cat converters not let a civic start and ive also seen bad oxygen sensors do that to your car and i seen clogged fuel filters do the same **** as well like i said it can be a number of things.

 

You might need to base map your ecu to you set up because i had the same problem. also try clean your iacv and bleed in your radiator by taking of the cap and let it warm up til your fan turns on.