Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem
A GOOD ONE!!!
motman:
OK,Where to begin, well the carb #1708 its a Buick carb. here is the question. I will preface this by saying there is a brand new MSD ready to run dist, new wires. new B+ (12V) supply to dist. the ground for dist is to the battery. ok, when it is damp (high humidity) wet. the engine will cold start and fast idle ok. but when kicked down off of high idle. the engine wants to slowly die. i can keep it running with my foot. now when its warm or cold and DRY there is no problem at all with this carb. thanks for any direction. Cliff i got the rods and jets from you so i know they are right. this all sets ontop of a 400 pontiac with 408-408 lift. nothing crazy good vacume 17+ at idle. any direction would be great thanks..... ??? ???
motman:
--- Quote from: motman on November 28, 2008, 11:26:27 AM ---OK,Where to begin, well the carb #1708 its a Buick carb. here is the question. I will preface this by saying there is a brand new MSD ready to run dist, new wires. new B+ (12V) supply to dist. the ground for dist is to the battery. ok, when it is damp (high humidity) wet. the engine will cold start and fast idle ok. but when kicked down off of high idle. the engine wants to slowly die. i can keep it running with my foot. now when its warm or cold and DRY there is no problem at all with this carb. thanks for any direction. Cliff i got the rods and jets from you so i know they are right. this all sets ontop of a 400 pontiac with 408-408 lift. nothing crazy good vacume 17+ at idle. any direction would be great thanks..... ??? ???
--- End quote ---
10 deg of base time total 36
14 inch 4 open breather
1 inch spacer (for heat)
baseplate bushings
stock carb other than jets and rods
Cliff Ruggles:
I wouldn't think that humidity would have anything to do with carburetor operation, but temperature would.
Are you using the vacuum advance, and is it hooked up to ported or manifold vacuum?......Cliff
motman:
Cliff, its ported middle right side of carb. also what float level do you use on this carb.
motman:
Cliff, also here is a strange thing that happen when it does this. to me it sounds like the engine is sucking to much air. no vac leakes, like i said runs great in all weather except rain and snow (damp). have checked pulloff works,have checked choke function ok. man im going to pull out my last good hair LOL thanks man for your help.....
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