SC Idling rough when cold after new motor

rookie94sc

Registered User
Ok put a reman'd motor in my sc. And when it's cold it idles rough. The only thing I've changed other than the motor is deleted the EGR. But I blocked off the port with a plate and capped the vacuum lines. I checked w/ carb cleaner all i/c connections and such for a leak but couldn't find one. Only code I pull is the EGR (need to reburn the chip). Suggestions?


After the car warms up and when it's in gear it seems fine cept the very rare miss. Pulls hard under acceleration.
 
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Get an external vacuum guage on the car and tell us what vacuum reading it shows. You should be around 20 In Hg with a stock cam. It's not uncommon to get a vacuum leak after installing a new engine since all vacuum lines were off and all the IC tubing connections were apart.
 
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