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Team California
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Anyone know Mopar 5.7 Hemis?
Cranks but won’t stay running. Runs for a few seconds. I can hear the fuel pump in tank. Just thought there might be someone who owns one or works on them?
2008 Jeep GC, fwiw. Thanks!
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Denis Statement from Tylenol: "Nice try. Release the Epstein files." 
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08-03-2020, 09:04 AM
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Join Date: Feb 2008
Posts: 18,685
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Bring it over and burn it with the cow carcasses....
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dolor et pavor Copyright |
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08-03-2020, 09:14 AM
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Registered
Join Date: Jul 2003
Location: Valencia Pa.
Posts: 8,847
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That sounds like a Security system fault. Do they have a spare key? Did you scan it yet ?
They also develop all sorts of weird electrical problems with the TIPM ( fuse box ) Let me know if I can help
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No left turn un stoned |
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08-03-2020, 09:16 AM
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Team California
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Quote:
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Denis Statement from Tylenol: "Nice try. Release the Epstein files."
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08-03-2020, 10:23 AM
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Insert Tag Line HERE.....
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Agree with the alarm/ security maybe being at fault. Use the key to lock/unlock the drivers door .. ( with the door closed) and see if that makes any difference.
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Marc |
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08-03-2020, 10:26 AM
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Team California
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Doesn’t seem to be related to alarm system. We got it to start but it’s missing badly, sounds like running on 4-5 cylinders. Throwing a P0300 code, (random misfire or something). Doesn’t tell me anything I don’t already know.
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Denis Statement from Tylenol: "Nice try. Release the Epstein files."
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08-03-2020, 04:08 PM
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Snark and Soda
Join Date: Aug 2003
Location: SF east bay
Posts: 24,687
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Does that Grand Cherokee have MDS (cylinder deactivation)? Maybe it's activated...
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08-03-2020, 04:56 PM
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FUSHIGI
Join Date: Feb 2006
Location: somewhere between here and there
Posts: 10,735
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coil packs, plugs or plug wires?
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Cults require delusions. |
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08-03-2020, 05:22 PM
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FUSHIGI
Join Date: Feb 2006
Location: somewhere between here and there
Posts: 10,735
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water in fuel tank?
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Cults require delusions. |
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08-03-2020, 05:24 PM
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Still Doin Time
Join Date: Nov 2004
Location: Nokesville, Va.
Posts: 8,225
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Very odd. Has anything changed or repaired recently?
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'15 Dodge - 'Dango R/T Hauls groceries and Kinda Hauls *ss '07 Jeep SRT-8 - Hauls groceries and Hauls *ss Sold '85 Guards Red Targa - Almost finished after 17 years '95 Road King w/117ci - No time to ride, see above '77 Sportster Pro-Street Drag Bike w/93ci - Sold |
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08-03-2020, 05:58 PM
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Team California
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Quote:
I can say that it's not a very well maintained car and it was quite low on oil and coolant but this issue came up suddenly. It ran fine to the spot where it failed and now it's barely running.
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Denis Statement from Tylenol: "Nice try. Release the Epstein files."
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08-03-2020, 06:33 PM
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Grip It & Rip It
Join Date: Apr 2005
Location: SoCal
Posts: 1,219
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Lifter failure?
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82 911SC (sold) |
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08-03-2020, 07:14 PM
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Team California
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Quote:
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Denis Statement from Tylenol: "Nice try. Release the Epstein files."
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08-03-2020, 07:29 PM
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Brew Master
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No other codes? One of the common causes (according to the all knowing google) is low fuel pressure. How long has it been since the fuel filter was changed? Might be something simple to eliminate. My gut says it's ignition but if it's individual coil packs (not sure on a 5.7) it would throw a code for which bank or cylinder experienced the misfire.
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Nick |
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08-04-2020, 04:46 AM
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Team California
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Quote:
There are a number of parts, such as a fuel filter, that might be the cause but now it's a guessing game. We'll probably be chasing our tails on this one. 
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Denis Statement from Tylenol: "Nice try. Release the Epstein files."
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08-04-2020, 06:55 AM
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Brew Master
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I'd start with something cheap like the fuel filter if he's not sure when it was last changed. If the vehicle doesn't get driven much, it could have some nice sludge in the filter from ethanol fuel. From there, depending on the miles the vehicle has on it I'd move to spark plugs, another cheap "fix".
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Nick |
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08-04-2020, 07:49 AM
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Registered
Join Date: Jun 2013
Location: Orange County, Ca
Posts: 615
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you guys do know that motor has 16 plugs and coil packs right.
If it was low on oil or long between changes you may have a displacement on demand issue.
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1976 911 1976 914 1986 951 |
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08-04-2020, 09:31 AM
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Brew Master
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Quote:
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Nick |
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08-04-2020, 11:49 AM
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Registered
Join Date: Jul 2003
Location: Valencia Pa.
Posts: 8,847
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If it came in here, the first thing I would try to do , would be to isolate which cylinders are firing , and which ones are not . You can either old school it and unplug one coil/injector at a time, or drive it till it sets hard misfire codes for those cylinders ,and use your scanner to tell . Maybe your scanner even has live misfire data ?
Then, I would spend a few minutes moving coils/plugs around to see if the miss moves with them. I think that is about as far as you can go backyarding it
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No left turn un stoned |
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08-04-2020, 11:58 AM
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Registered
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Here is a cheap VW fix.
Let/get the coil packs dry, JB weld to stop the arcing. Enjoy the ride home and replace.
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Chris the more i learn, the less i know |
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08-04-2020, 12:36 PM
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78 Porsche 911 Turbo
1972 porsche 72 rsr clone
1995 porsche 993
1995 porsche 993
1990 porsche C2 911
1966 porsche 911
1984 Porsche 911
2003 Porsche 996
1985 Porsche 911 Cab
