Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - 1977 Chevy K20: Engine Suffers from Hesitation/Power Loss When In Drive
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Old 06-27-2012, 09:30 AM
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Quote:
Originally Posted by lt1silverhawk
I inspected the vacuum line at the intake as well as the modulator. It was dry at the intake, but covered in oil externally at the modulator (along with surrounding parts). And although I've tightened it it up before at the modulator, the small rubber hose was a bit loose again. I removed the small rubber hose connecting the modulator to the metal line and found no ATF inside.
No ATF is a good sign, but the piece of rubber tubing needs to be replaced w/new rubber tubing, not the old hardened or mushy-from-ATF piece that's on there now that's taken a set. Use a long enough piece that it's not pulling the hard line when connected, but not SO long that it crimps shut from any bends that you might need to put in it. Straightening the hard line so that it's directly in line w/the modulator vacuum port will help matters. I think we discussed this previously.
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