Loud creak when letting go of gas pedal

[polarnj]

1969 dodge polara

Remembering this from the test drive, will be getting it on the road soon.

When releasing the gas pedal when slowing down I hear a loud "grrrk" which I thought was under the floor. Seemed to happen every time I back off the gas pedal

I did notice that the throttle linkage under the hood creaks loudly when moving back and forth by hand. I wonder if that's the issue. Will give it some wd40 and try again soon. But I thought it was under the floor somewhere.

 

[mopar preferred]

There are a couple pivot points on the accelerator pedal and mounting bracket inside the car that could use a shot of lubricant also. Possibly even the throttle cable itself.

 

[polarnj]

There are a couple pivot points on the accelerator pedal and mounting bracket inside the car that could use a shot of lubricant also. Possibly even the throttle cable itself.

Yeah, thst section by the carb where there's 2 linkage cables squeaks loudly when you move it by hand, but I'm not sure if that would be loud enough to hear when going at 50mph though

 

[mopar preferred]

The parts i'm referring to are inside the passenger compartment, so you could well hear them.

 

[polarnj]

The parts i'm referring to are inside the passenger compartment, so you could well hear them.

Oh yeah sorry. I did pull it out of the garage and I don't hear it when revving the engine, so I suspect it's something that only happens when you are moving down the street (??)

 

[Big_John]

When releasing the gas pedal when slowing down I hear a loud "grrrk" which I thought was under the floor. Seemed to happen every time I back off the gas pedal

Sounds like a motor mount. Have someone get in the car, put it in drive and hold the brake very firmly while they stab the accelerator pedal quickly and let off just as quick. In other words, a quick blip. You look under the hood. If the engine lifts an inch or so, it's a motor mount. Not uncommon and not an expensive fix.

Will give it some wd40 and try again soon.

First thing you do is walk out to the trash can, lift the lid and throw all your WD-40 in the trash. It will work the best for you there.

WD-40 is a water displacing paraffin base solvent. Any lubricating quality is from the paraffin that's left behind when the solvent evaporates. It turns to gum, attracts dust and just doesn't do ANY of the things promised in their advertising. It usually makes things worse especially after a few applications. Pure snake oil on a grand scale. It doesn't work very well as a penetrant either.

 

[polarnj]

Sounds like a motor mount. Have someone get in the car, put it in drive and hold the brake very firmly while they stab the accelerator pedal quickly and let off just as quick. In other words, a quick blip. You look under the hood. If the engine lifts an inch or so, it's a motor mount. Not uncommon and not an expensive fix.

First thing you do is walk out to the trash can, lift the lid and throw all your WD-40 in the trash. It will work the best for you there.

WD-40 is a water displacing paraffin base solvent. Any lubricating quality is from the paraffin that's left behind when the solvent evaporates. It turns to gum, attracts dust and just doesn't do ANY of the things promised in their advertising. It usually makes things worse especially after a few applications. Pure snake oil on a grand scale. It doesn't work very well as a penetrant either.

What would be a good thing to lube the carb linkages?

 

[Big_John]

What would be a good thing to lube the carb linkages?

I'd probably put a dab of grease on it myself. Plain old motor oil would work too. Don't have any handy? Pull the dipstick and get a few drops off that.

Ideally, a pump can with plain old motor oil is nice to have.

I don't hear it when revving the engine

Again, check the motor mount. Linkage won't make that kind of noise... and actually, by not having any noise when revving it with no load really points to that being the first thing to check.

 

[sprice]

Sounds like a motor mount. Have someone get in the car, put it in drive and hold the brake very firmly while they stab the accelerator pedal quickly and let off just as quick. In other words, a quick blip. You look under the hood. If the engine lifts an inch or so, it's a motor mount. Not uncommon and not an expensive fix.

First thing you do is walk out to the trash can, lift the lid and throw all your WD-40 in the trash. It will work the best for you there.

WD-40 is a water displacing paraffin base solvent. Any lubricating quality is from the paraffin that's left behind when the solvent evaporates. It turns to gum, attracts dust and just doesn't do ANY of the things promised in their advertising. It usually makes things worse especially after a few applications. Pure snake oil on a grand scale. It doesn't work very well as a penetrant either.

CBC in Canada used to provide some maybe informative reviews on how products were invented on weekend broadcasts. From what I remember from the broadcast is that "WD' stood for "water displacement". how they came up with the "WD40" is because it took 40 trials to get it right (according to who and for what result?). Being a lubricant was not even motioned. I worked at Ford Dealership in the late 70's, it was used, from what I experienced, to spray under a distributor cap in case there was moisture. RARELY. Was it effective? Who knows. IMO, it is the most useless product in public market.

 

[polarnj]

I took it for a first drive to the gas station. I didn't hear the creak but it does have a whine every time you let go of the gas pedal and coast. Just keeps going until you push the gas.

 

[polarnj]

This is weird, I could have sworn that it was whining at first when you let go of the gas pedal and coast, but by the end of my 15 minute drive around the block it was doing it only when accelerating and not when you let the pedal up (??)

Either way, it starts at about 30 mph, loudest at about 40mph and goes down as you go faster. A kind of loud high pitched "wawawa" sound. Also, I thought I heard it "wind down" when I pulled up to a light and the trans upshifted