Thread: CIS problems
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Aren D. Aren D. is offline
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Join Date: May 2010
Location: Northen CA
Posts: 4
Question CIS problems

Hi, I have a 78 sc, with the 3.0l motor I am having some issues with it and I am hoping some one with a bit of experience can help me out.

when the car starts, it idles very rough like its only on 4 cylinders, then it warms up and idles at 1000rpm but the engines surges to 2000rpm and back to 1000 it will do this until the car is shut down.

the car has a MSD 6A ignition installed, otherwise its all stock. I replaced all the seals in the CIS manifold - fuel injectors seals, throttle body seals, cold start injector seal ext ext... I also searched for vac leaks and replaced all the vac lines. No change.

Any help would be greatly appreciated.
Old 07-28-2010, 10:06 AM
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