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2005 Dodge Ram rough idle #3056801
07/06/22 03:39 PM
07/06/22 03:39 PM
Joined: Jan 2006
Posts: 2,377
Lee Co. Fla.
5
5carguy Offline OP
top fuel
5carguy  Offline OP
top fuel
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Joined: Jan 2006
Posts: 2,377
Lee Co. Fla.
Truck has about 100,000 miles engine is a 4.7..Engine light came on,code was #2 cyl. faulty spark plug,coil or fuel injector.Has a rough idle.Changed all three and still the same.Compression test was 120lb.Anyone know what's wrong?Any advice?As always, TIA

Last edited by 5carguy; 07/06/22 03:39 PM.
Re: 2005 Dodge Ram rough idle [Re: 5carguy] #3056883
07/06/22 07:42 PM
07/06/22 07:42 PM
Joined: Jan 2003
Posts: 9,557
Freeport IL USA
poorboy Offline
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poorboy  Offline
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Joined: Jan 2003
Posts: 9,557
Freeport IL USA
Not much stuff good with a 100K miles on a 4.7.
Start by pulling the valve covers and make sure all the lifters are still in place and functioning correctly.
Then is probably time to replace the plastic timing chain guides. The worn guides allow the timing chains to flop around and can change the valve timing by a few degrees.
Hopefully it has not been overheated and blown a head gasket, or wiped out the bearings on the crank.

Re: 2005 Dodge Ram rough idle [Re: poorboy] #3058764
07/13/22 02:30 AM
07/13/22 02:30 AM
Joined: Jul 2022
Posts: 4
lyon
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fdax Offline
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fdax  Offline
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Joined: Jul 2022
Posts: 4
lyon
Our 2005 Dodge Ram 1500 with the 5.7 Hemi had a bad seal on the EGR tube. It was leaking on the intake end on the EGR tube.. New seal and all working again as it should.


snaptube vidmate

Last edited by fdax; 07/13/22 09:18 AM.
Re: 2005 Dodge Ram rough idle [Re: fdax] #3060000
07/17/22 04:37 PM
07/17/22 04:37 PM
Joined: Jan 2006
Posts: 2,377
Lee Co. Fla.
5
5carguy Offline OP
top fuel
5carguy  Offline OP
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Joined: Jan 2006
Posts: 2,377
Lee Co. Fla.
Sprayed choke cleaner all around engine to try to find a vacuum leak.No change.This is a tough one.Any more ideas?

Re: 2005 Dodge Ram rough idle [Re: 5carguy] #3060031
07/17/22 07:42 PM
07/17/22 07:42 PM
Joined: Jan 2003
Posts: 9,557
Freeport IL USA
poorboy Offline
master
poorboy  Offline
master

Joined: Jan 2003
Posts: 9,557
Freeport IL USA
Did you pull the valve covers?







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