Strange problem ???

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Graeme
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Location: Johannesburg

Strange problem ???

Post by Graeme » Sun 16 Oct 2011, 19:57

Got this problem I just can't understand. Here goes. When I drive my 67 the car goes fine and changes perfectly. Now when you stop and go up a steep driveway like mine , I give it gas to get up the driveway it seems like the acclerator is stuck but that's not the case as I've checked the carb linkages and check the pedal play and nothing is sticking or jaming when you floor the car. Could it be in the powerglide box cause it's really bad as the car is accelrating and my foot is off the gas pedal. The only way to kill it is to put your foot on the brake and turn off the key and with a thump the car switches off. WTF is going on.
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GRUNTY
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Joined: Thu 27 Dec 2007, 10:22
Location: Pietermaritzburg

Re: Strange problem ???

Post by GRUNTY » Sun 16 Oct 2011, 20:28

Perhaps you have a broken engine or gearbox mount and when you have switched off the motor it unjams the throttle linkage.Check it out by jacking the motor or gearbox a little. Cheers
Grunty

Bearhawke
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Re: Strange problem ???

Post by Bearhawke » Mon 17 Oct 2011, 00:05

Grunty is probably correct: PLEASE TAKE A HARD LOOK AT YOUR MOTOR MOUNTS------------ESPECIALLY THE L/H ONE!!!

GM had a huge problem with broken motor mounts in 1965-ca.69 Chevys with the L/H side of the engine lifting up and forcing the throttle linkage wide open hence causing numerous crashes. And I'm 99.9% sure that the rubber mounts are the same on RHD Impalas, etc. as on ours..............
Bearhawke in Az, USA

1998 Plymouth Grand Voyager minivan.

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Graeme
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Re: Strange problem ???

Post by Graeme » Mon 17 Oct 2011, 11:02

I would have never thought about that. Very interesting.The first time it happened I nearly went through my gate. Thanks guys for that info. :D :D :D
Friends don't let friends drive JUNK.

Tony69
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Re: Strange problem ???

Post by Tony69 » Mon 17 Oct 2011, 14:46

Interesting indeed, makes perfect sense.

Graeme, how was Rosebank yesterday? :P

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OldSkool II
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Re: Strange problem ???

Post by OldSkool II » Mon 17 Oct 2011, 16:22

now thats a good one
never heard of that happening before!
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FairmontGT
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Re: Strange problem ???

Post by FairmontGT » Mon 17 Oct 2011, 16:26

Bearhawke wrote:Grunty is probably correct: PLEASE TAKE A HARD LOOK AT YOUR MOTOR MOUNTS------------ESPECIALLY THE L/H ONE!!!

GM had a huge problem with broken motor mounts in 1965-ca.69 Chevys with the L/H side of the engine lifting up and forcing the throttle linkage wide open hence causing numerous crashes. And I'm 99.9% sure that the rubber mounts are the same on RHD Impalas, etc. as on ours..............
Exactly that happened with my mechanic with his 67 camaro. He luckily only busted one side shaft in the process but I think it scared the crap out of him.
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paulusvrotius1
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Re: Strange problem ???

Post by paulusvrotius1 » Mon 17 Oct 2011, 20:16

I had exactly that same experience with our company Ranchero years ago, in my case the excellerator pedal went to the floor as well.
I was totally baffled untill I checked the engine mounts and found the L/H one broken.
A couple of years later one of my workshop guys was doing a delivery and it happened again but he was not so lucky and hit a truck. The Ranchie got beaten up pretty badly. :(
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Cheers

My AMC:
1971 Capri Perana Yellow/Blk.


Old Fords never die because some clotheads keep bodging them back together!!

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Graeme
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Location: Johannesburg

Re: Strange problem ???

Post by Graeme » Mon 17 Oct 2011, 20:53

Looks like it's happened to alot of people. I will check my engine mounts tonight and report back. I'm still amazed cause I would have never thought a broken mount would jam the accelerator lingages. Tony I was off for a drive in the Buick .Some guy wanted to buy it.You stalker you :mrgreen:
Friends don't let friends drive JUNK.

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paulusvrotius1
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Re: Strange problem ???

Post by paulusvrotius1 » Mon 17 Oct 2011, 21:00

Greame,

What happens is the torque from excellerating causes the engine to lift in the opposite direction to the rotation of the propshaft. This causes the linkages to pull tight and open the throttle.
If you had a cable opperated throttle this wouldn't happen.
Cheers

My AMC:
1971 Capri Perana Yellow/Blk.


Old Fords never die because some clotheads keep bodging them back together!!

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