my rebuild motor runs and everything else is working except it wont hold at idle it stalls instead. im thinking a vac leak but does anyone else have any ideas??it would have to be a fairly large vac leak wouldnt it though to stall it outright?? its an 89 n/a

 

Sounds most definetly like a vac leak, happy hunting.

 

maybe the compression isn't good enough yet, as the engine breaks in the apex seals form better to the rotor housings and compression increases.

 

it idles really nicely when cold but as it heats up it gets crappier. also theres a whistling coming from my cone filter any idea what that is from??/

 

what have you done with your airpump? i figured if you have a cone filter, then the airpump hose may be sucking air making the whistling sound, otherwise it may be the vacuum leak causing your engine to stall. The thermowax and bac valve may assist the engine better in idling when the engine is cold. idk. how many miles are on it so far?

 

no air pump and no emmisions none of that stuff its ll removed. there's no aircare here so yay. the engine is like rand new just put in today started it up once then as it heated up it started to run sloppier so i let it cool off and started it up again
when its cold it runs awesome
but when it warms by the time it gets halfway on the thermostat it will die. also maybe totally unrelated my parking brake light is on now even when the break is off

 

so nobody has any ideas??