I recently replaced the accelerator pump diaphragm on my 1920 Holley. I drove it for a while and it worked good, but the car was a little slower then it used to be. The next day, the car will start but will die shortly after when at idle and will only run when the car is being driven. Stopping at lights or stop signs causes the car to die abruptly. Is it related to the accelerator pump?
Car dying when idling
- Thread starter 1971Kyle
- Start date
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Probably not. Sounds like maybe a vacuum leak. Make sure all the carburetor fasteners are tight. ALL of them. The base plate nuts. The screws that hold the carburetor together. They are all notorious for working loose over time. That could be your issue. I've grabbed a slant carburetor before and twisted it probably 1/8" in either direction before because all the screws holding it together were so loose. It was running like you describe, too. Tightened everything up and it ran great. lol
I agree 100% except I don't recommend using anything flammable to check for vacuum leaks. I always use water in a squirt bottle. It will do the same thing without the risk of fire.
This kinda goes across the board but...... anytime you disturb something there is a possibility that dirt/scale/light corrosion/etc. has been broken loose and moved on down the line. So, maybe the carb needs taken down and cleaned/checked to see if maybe dirt got somewhere it cant get through. Also, if you loosened anything that disturbed a gasket, or replaced any gaskets, maybe an air leak started there, or possibly a tiny piece of gasket material stuch to a flange is now creating a gap??
hadn't heard that, I like that idea a lot better
Princess Valiant
A.K.A. Rainy Day Auto
Hair spray works too. It is flammable but when and If it does go up flames, it's more of a flash fire and doesn't get to near the high temps as starter fluid or even carb cleaner
I'll take your word for it. lol
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