Hey guys I recently bought a 99 accord 4 cylinder automatic with a bad engine. I replaced engine with a known good one. No cel's or anything like that. However when I start it up when it's cold and put it in reverse or drive and touch the gas pedal it tries to stall unless I play with the pedal. If it's in park or nuetral it revs fine but as soon as it's in gear and cold it tries to die when on the gas pedal. It doesn't do this when it is warmed up and at operating temperature. Isles around 740-800 rpm. I'm just lost and don't know where to start with no cel. Any and all help is appreciated

 

Did you reuse the intake/exhaust and sensors from the original engine?

 

no sir. Injectors and sensors I didnt change

 

I did reuse the original tb so it does have the original tps and map sensors

 

Is the IAC functioning?

 

Idles around 740-800rpm when it's cold? Yeah, check IACV function.

-Amp

 

I'm sorry I misinformed you its idling 700-800 warmed up a little over 1000 when its cold