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Isaiah92260

01-08-2019 11:02 PM

Motor Idling high after driving or Revving ?

My carburetor is brand new, I’ve adjusted it and it has been running great, but recently after finding an exhaust leak at the gasket and Intake manifold
(My Bad Lol)
The motor has been going from 475 rpm to about 650 rpm’a at idle after revving the motor or when I come to a stop when driving, why does it do that and how could I fix it? Thanks! Ihave a 235 I6

geezer#99

01-08-2019 11:49 PM

Re: Motor Idling high after driving or Revving ?

Check your distributor advance is working correctly.

Isaiah92260

01-09-2019 12:56 AM

Re: Motor Idling high after driving or Revving ?

Quote:

Originally Posted by geezer#99 (Post 8439682)

Check your distributor advance is working correctly.

How do I check the advance? Just watch if the vacuum rod returns back to its original position after revving?

nsb29

01-09-2019 08:51 AM

Re: Motor Idling high after driving or Revving ?

I would be more apt to believe you have a problem with your linkage Or you have an intake leak

geezer#99

01-09-2019 10:00 AM

Re: Motor Idling high after driving or Revving ?

Quote:

Originally Posted by Isaiah92260 (Post 8439718)

How do I check the advance? Just watch if the vacuum rod returns back to its original position after revving?

Yup!
Make sure everything in the distributor moves freely.

Isaiah92260

01-09-2019 10:03 AM

Re: Motor Idling high after driving or Revving ?

Quote:

Originally Posted by nsb29 (Post 8439771)

I would be more apt to believe you have a problem with your linkage Or you have an intake leak

If I spray starting fluid around the base of the manifold it would rev if it had a leak right?

Isaiah92260

01-09-2019 10:05 AM

Re: Motor Idling high after driving or Revving ?

Quote:

Originally Posted by geezer#99 (Post 8439794)

Yup!
Make sure everything in the distributor moves freely.

Okay thank you I will check today! I will keep an update

jchav62

01-10-2019 11:07 AM

Re: Motor Idling high after driving or Revving ?

Everytime I come across that problem, it's the linkage getting caught up somewhere. My guess is linkage....

shp4man

01-10-2019 12:54 PM

Re: Motor Idling high after driving or Revving ?

Quote:

Originally Posted by Isaiah92260 (Post 8439795)

If I spray starting fluid around the base of the manifold it would rev if it had a leak right?

It would change, up or down. Also, sometimes intake leaks make weird moaning noises.

theastronaut

01-10-2019 01:14 PM

Re: Motor Idling high after driving or Revving ?

Throttle shaft bore could be worn out, keeping the butterfly from closing all the way.

Isaiah92260

01-10-2019 03:26 PM

Re: Motor Idling high after driving or Revving ?

Quote:

Originally Posted by jchav62 (Post 8440442)

Everytime I come across that problem, it's the linkage getting caught up somewhere. My guess is linkage....

Well the clip just broke that holds the linkage to the carburetor, maybe that was the problem, but now where do I find a new clip?

Isaiah92260

01-10-2019 03:26 PM

Re: Motor Idling high after driving or Revving ?

Quote:

Originally Posted by theastronaut (Post 8440520)

Throttle shaft bore could be worn out, keeping the butterfly from closing all the way.

It’s a brand new/rebuilt carburetor that I got from a well known shop near by me

Isaiah92260

01-10-2019 03:28 PM

Re: Motor Idling high after driving or Revving ?

Quote:

Originally Posted by shp4man (Post 8440512)

It would change, up or down. Also, sometimes intake leaks make weird moaning noises.

Yeah I know what you’re talking about, I miss aligned one of th gaskets on the intake and it was hissing so I push it down and retightened the manifold and it went away

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