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Uncommanded acceleration

Posted: Wed Jan 28, 2015 2:12 pm
by Puff Daddy
Recently, as I brake and come to a stop, I get an uncommanded acceleration that only stops if I take my foot off the brake pedal. Has anybody experienced this, or know what may be the cause?

Posted: Wed Jan 28, 2015 3:13 pm
by oldwinghunter
I would say that your power brake booster has a vacumme leak ....

Posted: Thu Jan 29, 2015 6:45 am
by Puff Daddy
oldwinghunter wrote:I would say that your power brake booster has a vacumme leak ....
I have stock drum non-powered brakes.

Posted: Thu Jan 29, 2015 9:21 am
by Stan
My best - non smartass answer - could it have something to do with the hand throttle cable ? The cable runs down to the top of the gas pedal - and is kind of close to the brake pedal fulcrum.
Stan

Posted: Thu Jan 29, 2015 10:10 am
by Puff Daddy
Stan wrote:My best - non smartass answer - could it have something to do with the hand throttle cable ? The cable runs down to the top of the gas pedal - and is kind of close to the brake pedal fulcrum.
Stan
Again, I wish it were that easy. I don't have one of those.

It seems like it occurs right as my front suspention "unloads" after I come to a complete stop.

This sounds out of left field, but...it it possible that my engine could be loose on the mounts, and is somehow affecting the throttle linkage?

It just seems like the linkage between the throttle and the carburator is so simple. I don't see how it could be that. In my simplistic mind, the only other thing that could be moving is what the carb is attached to.

Coincidentally, I have a pretty significant rattle where the fan hits the shroud if I accellerate too hard. (It started sometime after I completed my power steering upgrade, and I can't seem to get the shroud adjusted right.) Maybe the problem's not really with the shroud.

Posted: Thu Jan 29, 2015 11:25 am
by Stan
You might be " on to something" - now that you mention it -- busted motor mount.
Stan

Posted: Thu Jan 29, 2015 3:40 pm
by oldwinghunter
motor mount could also be an issue then.. whole motor movin around ...

Posted: Mon Feb 02, 2015 4:56 pm
by DirtDonk
Absolutely. In drive it will twist one way, while in reverse it will twist the other.
While it's probably just expedient to replace the mounts if they're old enough, you could probably ratchet strap the engine down (both sides) and drive it that way temporarily to see how it reacts.

Temporary unless it works that is!

Paul