Re: Engines runs stalls when put in gear

Posted by Owen_Dyneto On 2013/8/21 14:29:22

You have a very basic vacuum system, the only vacuum unit on the car is likely the windshield wiper motor which is fed from the vacuum booster pump which is part of the fuel pump. Leaks could be at the manifold bolts, the carburetor, or the booster pump - not likely that it's the wiper motor itself as that would normally be shut off, though you could have a broken line or hose.

First I'd check the carburetor and manifold bolts for tightness. Then check the vacuum lines for broken lines or hoses. Check the booster pump for leaks. If that leads nowhere, I'd recommend using a vacuum gauge and attaching it to the intake manifold (there normally is a plug you can remove for this purpose, or use the opening in the intake that feeds the vacuum booster pump). Measure vacuum with a warm engine idling - a healthy engine should give 18 to 20 inches of vacuum. If not you either have a leak, a badly worn engine, or an engine severely out of tune.

You didn't mention idle speed, though not overly critical it should be over 400 rpm.