I should have responded as my thought was a massive vacuum leak. I had the
same thing happen to me where the plug fell out. But it was when I was
starting the car rather than when it was running so it was fairly obvious.
I found the plug on the ground and with some epoxy, I glued it back in
where it has remained now for fifteen years or so.
David Councill
67 BGT
72 B
At 07:06 AM 1/28/2004 -0500, Christian, Wellner L. CIV
COMNAVAIRSYSCOMPATUXENTRIVERMD AIR wrote:
>Group,
>
>Memory Refresher
> Symptoms - Ran perfectly (at least for my car) above about 4000
> RPM. No miss
>or hesitation. Absolutely would not run at all below about 3500 RPM (acted
>like the key was turned off).
>Answer:
> I could only come up with two things that could cause the above
> condition.
>Both of these would have to have occurred while the engine was above approx.
>4000 RPM. I was going down the interstate at about 4200 RPM in fourth and
>didn't know I had a problem until I began to back off the throttle.
> Centrifugal advance stuck fully advanced.
> Massive vacuum leak.
> It was the vacuum leak. The casting plug on the front of the
> intake manifold
>(at the end of the cross-over tube) had fallen out !!!
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