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2011 grand chereke 5.7 hemi miss fire problem? #2598462
12/29/18 06:00 PM
12/29/18 06:00 PM
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NE OHIO
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kevin69bman Offline OP
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kevin69bman  Offline OP
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Hi Folks I got 5.7 hemi that is misfiring on # 5 cylinder only at high rpms and cruises speed .

Its not the plugs ,coil pack or injector all new I even moved them all to #3 cylinder and still comes up #5. Compression is the same in all cylinders at 175 psi 90,000 miles on it any Ideas? I heard that it might be a lifter problem but there is no ticking.
Kevin

Re: 2011 grand chereke 5.7 hemi miss fire problem? [Re: kevin69bman] #2598463
12/29/18 06:07 PM
12/29/18 06:07 PM
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Central Florida
larrymopar360 Offline
Stud Muffin
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Central Florida
Originally Posted By kevin69bman
Hi Folks I got 5.7 hemi that is misfiring on # 5 cylinder only at high rpms and cruises speed .

Its not the plugs ,coil pack or injector all new I even moved them all to #3 cylinder and still comes up #5. Compression is the same in all cylinders at 175 psi 90,000 miles on it any Ideas? I heard that it might be a lifter problem but there is no ticking.
Kevin
I'm far from an expert on these, but I do know the MDS lifters can be a bit problematic, but since you have no noise, I don't know. I hope someone chimes in soon with some help for you. You might try some of the LX forums. Some very knowledgeable people there when it comes to the 5.7's.


Facts are stubborn things.
Re: 2011 grand chereke 5.7 hemi miss fire problem? [Re: kevin69bman] #2598483
12/29/18 06:48 PM
12/29/18 06:48 PM
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N.W. Florida
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Fat_Mike Offline
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I had a similar problem on a non-mopar. Turned out to be bad injector seal(s).

Re: 2011 grand chereke 5.7 hemi miss fire problem? [Re: Fat_Mike] #2598523
12/29/18 08:27 PM
12/29/18 08:27 PM
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Central NY
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GarageDodge Offline
mopar
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Central NY
could be a computer or wiring problem,just had a 2006 t&c and a 2004 ram with a missfire,within a week,both computers did not flash the coil on one cylinder.checked wires ok replaced pcm,both ok.

Re: 2011 grand chereke 5.7 hemi miss fire problem? [Re: kevin69bman] #2598997
12/30/18 11:26 PM
12/30/18 11:26 PM
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NE OHIO
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kevin69bman Offline OP
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The MSD was my next step but I thought they were only on cylinders 2/4/6/8

Re: 2011 grand chereke 5.7 hemi miss fire problem? [Re: kevin69bman] #2601768
01/05/19 12:56 AM
01/05/19 12:56 AM
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kevin69bman Offline OP
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OK #5 intake lobe is gone on the cam
Cam replacement almost as much as a rebuild motor
Ma mopar is back order on motor for 6 months know problem I found out no junk yard will sell a motor either so aftermarket engine it is motor labor 7,000 grand

Re: 2011 grand chereke 5.7 hemi miss fire problem? [Re: kevin69bman] #2608735
01/18/19 07:37 PM
01/18/19 07:37 PM
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Sobieski Wi
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bee1971 Offline
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Sucks about the cam and lifters

A lot of talk on the truck forums with the same issues 2009-2013 2014


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