Engine will not Idle.
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Senior User
Joined: Aug 2007
Posts: 167
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From: Ogden Utah
Update: I have ruled out the carburator. The engine idles ok now but still sounds like it is missing bad. The Timing is dead on,( It doesnt need to be advanced to run anymore). I am thinking it is a spark issue or low compression. I unplugged and reconnected the spark plug wires off the distributor one at a time with the engine running. The idle did not drop at any time when I pulled a plug wire off the distributor. I am thinking it may have a random misfire or a weak coil. I am going to replace the coil to see if that helps. if not then I will move to the pick up in the distributor. What else should I check?
Cargo Master
Joined: Nov 2009
Posts: 2,364
Likes: 118
From: starship enterprise
Check the dist. cap for a crack and carbon and also the rotor. Check the mechanical and vacuum advance for free operation, is this points or solid state? I have seen points act strangely like a flooding cond. and gapping them was the remedy.
Cargo Master
Joined: Nov 2009
Posts: 2,364
Likes: 118
From: starship enterprise
Check the dist. cap for a crack and carbon and also the rotor. Check the mechanical and vacuum advance for free operation, is this points or solid state? I have seen points act strangely like a flooding cond. and gapping them was the remedy.
Thread Starter
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Senior User
Joined: Aug 2007
Posts: 167
Likes: 0
From: Ogden Utah
The only thing I changed was the carb, we tried a third one and the truck runs better than with the previous two. It has the electronic ignition in it, blue grommet ignition box.
Cargo Master
Joined: Nov 2009
Posts: 2,364
Likes: 118
From: starship enterprise
Well, then you have a carb problem. It might have flooded and loaded up and fouled out a few plugs and a new set of plugs is in order. I have had that happen before too. Carb might be fine but plugs aren't. I understand that the plugs, cap, rotor seem fine, but i had an engine run funny after a carb change, blamed the carb. Pretty soon lost spark, I had bumped the distributor while changing the carb and the tip of the rotor came loose and the metal end caught on the cap, ripped it loose and I had a spark and timing issue, all from a carb change.
Senior User
Joined: Jan 2006
Posts: 434
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From: Little Falls,New York
Just a thought for the future, if you don't have curb idle adjusted right, you could be out of the idle cicuit. You need to take your time setting, as the fuel level takes about 30 seconds to stabilize after adjustment. Holley TV : Featured Holley TV // on the PowerTV Network
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