Jump to content

Engine shake at shut off


620owner

Recommended Posts

  • Replies 15
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

So this is something it had not done before? It's definitely not the mounts though. They're designed to let engine wobble. Did you change the timing by any chance? beyond that, I'm with nl320what. 

Link to comment

Did you remove the engine when doing the trans? May have upset something.

 

 

Check the idle cut is connected. It should make a clicking sound when the ignition is turned on/off/on/off.

Did you change spark plugs?

Did you replace thermostat?

Are you using a different gas than normal?

  • Like 1
Link to comment

No didn't remove engine. I'll check the idle cut.

nl320what said bad gas.... come to think i'm running out a tank from last fall and it's down under 1/4 now.

Didn't give that a thought. The truck sat over the winter with a full tank in the garage.

I just swapped the tranny and  started driving it again. I'll top it off with premium and see if that makes a difference.

Link to comment

I'm getting a slight engine shake at shut off. Just swapped the tranny, wondering if I weakened a motor mount ?

I don't think I have a broken motor mount, drives great but it just started this after the swap.

Could it be something else ?

 

I'll take that as not removing engine.

 

Try the gas, you have to fill it up anyway.

Link to comment

Causes of engine 'run on' or 'dieseling'

 

 

Idle too high for idle cut to have any effect.

BCDD set incorrectly causing a fast idle.

Idle cut stuck open, or insides removed or carb replaced with one that doesn't have one.

Carb flooding, making the idle cut useless.

 

If the idle is correct, carb not flooding and idle cut working there shouldn't be a problem. If you have an old carb without an idle cut, the following may cause run on...

 

Engine running too hot.

Spark plug range too hot

Excessive carbon build up

Compression too high / Too low an octane gas

Link to comment
  • 2 weeks later...

Just be in the habit of using the clutch to kill the car.

I got in the habit of doing this before I knew how to fix the dieseling so I can do it perfectly, now I have no idea if my trucks diesel or not because it's a habbit :)

Link to comment

The most likely issue is bad gas, but also look for vacuum lines that don't fit tight or got damaged.  Replace all that are brittle, hard, cracked, or don't fit very tight.  Check that the vacuum unit on your distributor can hold a vacuum indefinitely.  Re-torque intake and carb hardware.  

Link to comment

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.