Won't Idle = why

dave377

Registered User
I took the engine out of a 90 RX7 and it ran grate so I instaled it in a 9o SC and now it will not idle. It acts like it is idleing so low that is dies. It seams to run ok when you bring the idle up to 1300 rpm or more. IT reves up good also. I tried to checking for vac leaks by spraying starting fluid at the lines and the intercooler tubes but I can not find any leaks. I also tried switching the computers between the two cars and still won't idle. I used every thing out of the RX7 so all the sencers should be ok seeing that it ran good in RX7. I went ahead and tried switching out the idle control valve and still won't idle.
Where do I go from here Help please
 
cel

do you have a check engine light on?

how about the maf sensor if it's dirty can cause this too..

have you tried to pull some codes?
 
Gotta be a major vacuum leak somewhere!!! Sounds like
same as mine was doing when my vacuum gauge was
only reading 10-11 of vacuum!!!

BTW....ITS an XR7
Tom
 
Ya I may also just because its easy, run around and ground some stuff out.. I had an s10 did this same crap to me all the time. I just put a chassis ground to the engine, dash, and harness and never had another problem w it.. I always plan on dealing with bugs like that when doing a swap.. Good luck! I hope you figure it out!
 
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