motor stumbles and stalls when cold

[GN FAN]

hello all.

sorry for the noobie questions but....i did a little searching but need a good place to start. the car has a stumble and hesitation when cold. has a little trouble staying running in park until it gets warm. i have a disconnected vaccum line but have no clue where it goes.....vaccum is about 12-15 at idle. i checked a plug and they look ok....probably need changed wires too since when i removed the #1 wire the metal part inside was still hooked to the plug. any other ideas of where to start looking?? no ses light but i don't have a scanmaster as of yet.

 

[DMan]

Did it just start doing this or was it always doing this?

What chip are you running? Factory chip didn't have great cold start characteristics. If you are still running factory chip, try a Thrasher 93.

hello all.

sorry for the noobie questions but....i did a little searching but need a good place to start. the car has a stumble and hesitation when cold. has a little trouble staying running in park until it gets warm. i have a disconnected vaccum line but have no clue where it goes.....vaccum is about 12-15 at idle. i checked a plug and they look ok....probably need changed wires too since when i removed the #1 wire the metal part inside was still hooked to the plug. any other ideas of where to start looking?? no ses light but i don't have a scanmaster as of yet.

 

[GN FAN]

i know it's kinda pointless to figure out without a scanner. i just got the car monday so i don't know if it always did it. i have a RA 98 chip and stock injectors but i was forced to put a less desireable brand of premium in my car do to a power outage so maybe that's not helping either. last night it didn't seem to do it at all and ran great....the only thing different i did was put it in the garage so who knows. i'm thinking it's the IAC but i will have access to a scanner monday to find out for sure. thanks for the reply.