What happened to my engine (video)
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What happened to my engine (video)
Hey all. I'm new here. I have a 2005 Grand Cherokee Ltd. with the Hemi engine. Mileage is 205,000 and the car has been spectacular.
However today, I had someone come by for a test drive (I'm selling the vehicle). I put gas in it just before he arrived and it drove great. The guy took the car on a 15 minute test drive and then parked it. I drove it about 8 miles to a store. When I came out of the store, the vehicle wouldn't start. It was crank and crank, then try to start. The engine would rev all the way up and then die. I was guessing it was the fuel pump.
Anyway, I had the car towed home. I was able to start it and drive it into driveway, but there's now a tick. I'm hoping this video will help someone identify the problem.
As I said, the car was running great and has a perfect maintenance history.
Any ideas on what's happened? I'm a decent mechanic with Mercedes, but Jeeps are a bit "foreign" to me (LOL).
Thanks for the help!
However today, I had someone come by for a test drive (I'm selling the vehicle). I put gas in it just before he arrived and it drove great. The guy took the car on a 15 minute test drive and then parked it. I drove it about 8 miles to a store. When I came out of the store, the vehicle wouldn't start. It was crank and crank, then try to start. The engine would rev all the way up and then die. I was guessing it was the fuel pump.
Anyway, I had the car towed home. I was able to start it and drive it into driveway, but there's now a tick. I'm hoping this video will help someone identify the problem.
As I said, the car was running great and has a perfect maintenance history.
Any ideas on what's happened? I'm a decent mechanic with Mercedes, but Jeeps are a bit "foreign" to me (LOL).
Thanks for the help!
Last edited by mikeybbrooks; 02-08-2019 at 02:51 PM. Reason: add video
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#4
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It sounds to me he over-reved it and it now has a bad lifter or something.
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Quick update - I've drained the gas and put in good fuel (plus a can of Seafoam). So there's 8 gallons of gas and a can of Seafoam in the tank.
The car runs better now. There's no tick or knock, but I'm getting a misfire at cylinder 6 and smoke coming out the exhaust (OBD2 code of P0306). I'm also getting the P1521 (I think) indicating the wrong oil??
I plan to switch the coils and see if the misfire follows the coil.
Anything else I should be doing?
I appreciate the help!
The car runs better now. There's no tick or knock, but I'm getting a misfire at cylinder 6 and smoke coming out the exhaust (OBD2 code of P0306). I'm also getting the P1521 (I think) indicating the wrong oil??
I plan to switch the coils and see if the misfire follows the coil.
Anything else I should be doing?
I appreciate the help!
#7
Old fart with a wrench
I think that engine runs on the variable displacement system where it runs on 4 cylinders until power is demanded, then runs on all 8. I believe that's accomplished by holding the lifters and valves open with magnetic solenoids if I'm not mistaken.
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Year: 2001
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Engine: 4.0
Could be the Sea Foam, could be a head gasket. How much SF did you put in, the whole can in 8 gallons? Should be a can to 20 gallons. Have you checked the oil? Make sure it's not milky.
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