:ball: Just got in my 1971 Skylark 350 2bbl yesterday after it had sat for a bit. Out of no where she's running real bad, misfiring and shaking a low rpms. She even spits when shut down. Cap/Rotor wires plugs etc. were all changed recently and appear fine. She was just fine prior! Checked the timing and dwell and all seems OK as well. What gives?? Even tried adjusting the carb with no change. Recently I've been having problems with my brakes after changing the master on a power front disc system but don't think the two are related. Any ideas??
Could be a bad vacumn leak with the brake booster. Plug off the vacumn line that goes to the brake booster and see if the engine runs any better.
How recently? I mean did the problems arise immediately after the change? Ive put wires on to the wrong cylinders and had similar issues. Something to check maybe. good luck
pull plugs and see if the are very black or wet it might also tell you which cyl is the prob as it might only be 1 or 2 bad plugs how long did it sit ,carb may be dumping fuel/bad fuel
Checked the vacuum lines to the brake booster and everywhere else I could see. All looks fine! Car only sat for a week before all hell broke loose. Got the feeling it's not the carb even though I was intending to replace it as it does seem to have an internal leak. Gonna be swapping in a facotry 4BBl carb and manifold real soon as both are getting cleaned and rebuilt as I write this. Car has 88K miles but it looks like the heads were redone recently. Only thing I see that is definatelty bad is that I have an exhaust manifold leak on the D/S. It kills me that this all occured uzzled: overnight after I parked the car!!
If you pull each spark plug, you might find one that isn't firing right. IF they all look the same, it might be another issue. Good luck, ElectraJim
Thanks I checked the plugs and they are OK. I'm thinking that maybe I blew out the power booster for my brakes. After all I still have a rock hard brake pedal after changing the master. Will check vacuum issues later today.
yes, but did you plug it? The missing could definitely be related to the brake problem. The power booster gets its vacuum from one of the intake runners. If the power booster has a vacuum leak, its going to make the cylinder on that runner miss. Remove the large vacuum hose from the power booster and plug it. Start the car and see if the miss goes away. If it does, it will confirm the problem of a bad power booster.
sould like your not getting vacuum to the booster for hard pedal and believe you still have a vacuum leak causing most of your problems carb base plate could be bad or pcv or possibly wrong hose routing but check your points/dwell and timing as they could cause low vacuum explain more about the time you drove it before it ran rocky did you run it hard/overheat/run long time/wet or rainy out? how old are wires/coil are any wire loose to plugs /coil check dist wire to coil
