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Originally Posted by tonyfm
if i pull the plenum off and there was a leak in the spider and/or nut, wouldn/t there be fresh wetness or small fuel puddles liek before in order to verify?
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Possibly! I had some small puddles but it didn't look or smell like gas. It was kind of an oily gunk and not very much of it. I was very reluctant to pull the plenum off but in the final analysis found that it was not very difficult to do and at worst might cost you $11 - $14 for a new gasket to button it up again.
It shouldn't take more than 1/2 to 1 hour to pull the plenum but take care in tagging the bolts because they're all various sizes and some don't come out because they're guide pins. I used a piece of plastic foam and pushed the hardware into it to keep the pieces separated.
Not believing that I had a bad regulator, I even reused the gasket temporarily to do some additional testing (there was no visible damage to the gasket) by coating both sides with vaseline and reinstalling the plenum.
I really never found out whether the failure mode was a bad regulator, leakage, stuck injectors, or whatever; however, after $320 in parts for the spider and nut kit (the nut kit was the most difficult part of the replacement), everything's running great.