Been a while since I posted. Have a 68 Camaro with 350 and I just removed the manifold to fix a oil leak. Oil leak is gone but I have a strange problem. At a stop if you stab the throttle it actually pulls away and accelerates on it's own. It only happens once in a while. I thought it was spring tension on the throttle so I tightened the spring. Am I on the right track? Should I increase the spring tension?
Better pull the carb off. Could be a dangerous situation...
Are you using a cable setup, or a linkage type? Check for binding either way.
With the carb off, open and shut the throttle while looking underneath at the throttle blades. Make sure they aren't sticking or bound. Check your fast idle linkage and choke. Clean the throttle bores with some carb cleaner if they are sooty.
Lead Mechanical Engineer
Art Morrison Ent. Inc.
Yes, it was really scary!!! Motor mount is okay. Linkage seems to operate smoothly and I can't get it to do it in the garage. The carb is a Carter AFB 650 CFM(basically the same as a Edelbrock). I will pull the air cleaner and check closer when I get home tonight. Any more ideas?
It IS your drivers side motor mount. [img]smile.gif[/img]
How did you check it? This is a common problem and you have described it to a "T". Do not just look at it and say it is fine.
You can verify this by running a chain from the engine to the drivers side upper a-frame cross shaft to restrain engine movement and see if this restraint causes the problem to go away. If it cures the problem, go get a new motor mount.
Trust me on this one! [img]graemlins/thumbsup.gif[/img]
Bingo-You guys nailed it. Looked at the linkage etc-all okay. With the hood up started the car put in drive stab the throttle and the motor lifted off the mount and accelerated. Motor mount is only about 2 years old but is stock stuff. I made the mistake off thinking it wasn't the mount because of the age. With 400 + hp time for something better. Thanks to all for your help.