STUCK IN FULL THROTTLE!

[pontiacgp]

Heres just a shot in the mechanical dark....I had a 68 olds delta 88 that my dad let me borrow a few times to go on a trip here and there and it would do the same thing. Turns out...it was a broken left side motor mount that would allow the motor to move enough to cause the cable to bind slightly for a few tense moments...took us a major minute to figure it out :shock:

never would have thought of that one...how'd you figure it out?

 

[G-Body_Vet]

Stock or aftermarket air cleaner? Had this happen to me years and years ago when using an aftermarket air cleaner. The linkage would bind on the bottom of it. I had an Edelbrock carb though. Was pretty f**ked up with a warmed over 350 and 3.73's when the car would blast off on it's own :lol:

 

[CaliCuttie]

Stock or aftermarket air cleaner? Had this happen to me years and years ago when using an aftermarket air cleaner. The linkage would bind on the bottom of it. I had an Edelbrock carb though. Was pretty f**ked up with a warmed over 350 and 3.73's when the car would blast off on it's own :lol:

It's an aftermarket air cleaner that came with the car. I have the stock air cleaner chillin in the back but it doesn't look very pretty. Here's the engine bay

 

[bill]

Heres just a shot in the mechanical dark....I had a 68 olds delta 88 that my dad let me borrow a few times to go on a trip here and there and it would do the same thing. Turns out...it was a broken left side motor mount that would allow the motor to move enough to cause the cable to bind slightly for a few tense moments...took us a major minute to figure it out :shock:

never would have thought of that one...how'd you figure it out?

Well, first we noticed that the only time it seemed to do it was usually from a near dead stop and at a fairly hard throttle. Then we noticed a bumping noise sometimes after we killed the engine with the key. The mount was completely broken, but your rarely noticed it just driving normally. I guess the motor weighed so much and all the torque would move the car without straining it enough to notice :lol: When we replaced the mount, the problem vanished...(pooof)
Bill

 

[CaliCuttie]

Heres just a shot in the mechanical dark....I had a 68 olds delta 88 that my dad let me borrow a few times to go on a trip here and there and it would do the same thing. Turns out...it was a broken left side motor mount that would allow the motor to move enough to cause the cable to bind slightly for a few tense moments...took us a major minute to figure it out :shock:

never would have thought of that one...how'd you figure it out?

Well, first we noticed that the only time it seemed to do it was usually from a near dead stop and at a fairly hard throttle. Then we noticed a bumping noise sometimes after we killed the engine with the key. The mount was completely broken, but your rarely noticed it just driving normally. I guess the motor weighed so much and all the torque would move the car without straining it enough to notice :lol: When we replaced the mount, the problem vanished...(pooof)
Bill

that's a really interesting story, but I had the motor mounts replaced as soon as I bought it,so I guess it rules out that cause

 

[G-Body_Vet]

Just get out there and snap the throttle wide open by hand with the engine off (air cleaner on) and see what's happening. There really can't be too many things causing it. Bottom line is something is causing it to bind at WOT. There's not much there to cause it besides your throttle return spring, accelerator cable, or the carb linkage binding on something.

If it's the air cleaner, just go back to the stock one for the time being. A functional and SAFE car is better than a chrome air cleaner.

 

[CamaroAdam73]

hey, chrome won't get you home.

 

[pontiacgp]

hey, chrome won't get you home.

my chrome always gets me to my home page...

 

[tc1959]

hey, chrome won't get you home.

my chrome always gets me to my home page...

Ah, Google humor :lol:

 

[jae]

Heres just a shot in the mechanical dark....I had a 68 olds delta 88 that my dad let me borrow a few times to go on a trip here and there and it would do the same thing. Turns out...it was a broken left side motor mount that would allow the motor to move enough to cause the cable to bind slightly for a few tense moments...took us a major minute to figure it out :shock:

Had the same issue on the '65 Impala, same scenario. Cruising would be fine, but starting from a stop or a hard throttle app it would jump or wouldn't let out of full throttle and it was a Quadrajet (used the linkage we pulled from the donor car).

Calli, I would check the mounts anyway, they could be loose or broken, bolt could have broken. Had an issue on the DD where the place I had do work on it didn't tighten the motor mount bolts. I kept hearing a clunking sound on decel for weeks. Finally crawled underneath and both thru-bolts weren't tight - the a-holes just placed the nuts on the ends of the bolts without tightening / torquing them down.