Help: 1972 Dart carter 2BBL

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02-09-2009, 11:01 AM

premiumdan

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Help: 1972 Dart carter 2BBL

MoparCrew:

When I let off the gas-pedal, the RPMs SLOWLY return to idle.
Normally, the RPMs drop almost instantly.
This happens during driving AND when parked.
None of the linkage is binding.

Any ideas?

Thanks.

-Dan

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02-09-2009, 11:54 AM

Polaradude

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How freely is the cable moving from the pedal to the linkage ?

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02-09-2009, 12:43 PM

premiumdan

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Cable

Freely.

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02-09-2009, 12:58 PM

Polaradude

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Throtle plates binding in the bore, ie: worn bushings ?

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02-09-2009, 01:22 PM

dtalen2

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This may be a shot in the dark but I can remember a few times I had this problem with a Checy and an AMC. Both were 4-V carbs on V-8's but the problem was caused by a vacuum leak at the manifold. You can try the old school detection trick by running the engine and then spraying the manafold at the gasket seal areas around the base of the carb and where it meets the heads. If the engine speeds up you have a leak in that area. Good luck and I hope this helps.

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02-09-2009, 05:52 PM

66sportfury

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Quote:

Originally Posted by dtalen2

You can try the old school detection trick by running the engine and then spraying the manafold at the gasket seal areas around the base of the carb and where it meets the heads. If the engine speeds up you have a leak in that area. Good luck and I hope this helps.

yes that works just fine you can use starting fluid. spray the vacumm lines too.

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