83 Toyota pickup stalling
My 83 Toyota pickup suddenly began stalling yesterday every time I slowed down for a light. The engine sounds rough and/or slow. I can keep it running by running the RPM up a bit. I don't know wh...
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Ignition systems work 500% harder the deeper the gas pedal is pushed. It would be incredible to have an older non-computer vehicle have the OP's posted symptoms lie with the ignition system i.e. starts OK runs OK at higher speeds but stalls on deceleration or idle and have it due to ignition.
Tucson Jim gave one heck of a good answer. About twenty years ago I had a lady show up on a late Sunday afternoon. It was pouring rain, and windy. A Toyota. Same symptoms. It took about ten minutes of diagnostics to determine the obvious vacuum leak was exactly as Tucson Jim described. Lucky for me I had a flex shaft screwdriver which I fitted a # 2 Phillips to, and tightened all the screws. It cured the problem. The woman was astonished. I told her I was an electrician not a general mechanic so there would be no charge. She put her hands on her hips and declared "Nonsense!" She was hauling three lasagna casseroles huge casseroles, and she demanded I take one. "My parents are from the old country and I would be insulted if you refused!" The taste! The best lasagna I have ever tasted. About five pounds worth. What a nice memory.
The OP's problem lies within the carburetor/manifold. Some of the older carburetors had anti-dieseling throttle solenoids that held idle then retracted and totally closed the throttle idle when the key was shut off. An unplugged or failed solenoid should not be overlooked. Nor any of the multitude of tiny vacuum hoses and diaphragms that connect to the carb.
Tucson Jim gave one heck of a good answer. About twenty years ago I had a lady show up on a late Sunday afternoon. It was pouring rain, and windy. A Toyota. Same symptoms. It took about ten minutes of diagnostics to determine the obvious vacuum leak was exactly as Tucson Jim described. Lucky for me I had a flex shaft screwdriver which I fitted a # 2 Phillips to, and tightened all the screws. It cured the problem. The woman was astonished. I told her I was an electrician not a general mechanic so there would be no charge. She put her hands on her hips and declared "Nonsense!" She was hauling three lasagna casseroles huge casseroles, and she demanded I take one. "My parents are from the old country and I would be insulted if you refused!" The taste! The best lasagna I have ever tasted. About five pounds worth. What a nice memory.
The OP's problem lies within the carburetor/manifold. Some of the older carburetors had anti-dieseling throttle solenoids that held idle then retracted and totally closed the throttle idle when the key was shut off. An unplugged or failed solenoid should not be overlooked. Nor any of the multitude of tiny vacuum hoses and diaphragms that connect to the carb.
