5.7 Hemi stall and idles rough - Engine Troubleshooting


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5.7 Hemi stall and idles rough

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ratrace2
User

Sep 1, 2012, 11:12 AM

Post #1 of 3 (2490 views)

5.7 Hemi stall and idles rough	Sign In

Hello All, "Happy Labor Day"

I got a 2005 Dodge Durango 5.7 hemi (16 spark plugs) (automatic, a/c) across the road.

Friend complaines that the truck (SUV) stalls on deceleration, and that it runs rough when it gets hot.

Cold, the truck starts fine no problem.

Oh yea, I had a couple of guys tell me that the valve springs in this truck are bad, or weak. I have heard of no TSB or Recalls.

A Vacuum gauge test showed a "wobbly" or bouncing
reading. I would think that this indicates a poorly sealing motor at the valves. IMO, it could be valve springs or Sticky lifters.

Let me know what ya think, thanks guys..

(This post was edited by ratrace2 on Sep 1, 2012, 11:17 AM)

Double J
Veteran / Moderator
Double J profile image

Sep 1, 2012, 12:32 PM

Post #2 of 3 (2449 views)

Re: 5.7 Hemi stall and idles rough	Sign In

Could be a few different things

Any Trouble codes ?

ratrace2
User

Sep 1, 2012, 12:43 PM

Post #3 of 3 (2447 views)

Re: 5.7 Hemi stall and idles rough	Sign In

No codes.

Maybe clean EGR; throttle body passages; check for vacuum leaks; add some seafoam to pump up the lifters.

Anyone ever heard of these 5.7 Hemi's having valve spring problems??

(This post was edited by ratrace2 on Sep 1, 2012, 12:50 PM)

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