engine missing
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Posting Guru
Joined: Jun 2007
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From: OAHU,KANEOHE HAWAII
engine missing
Ok when i finished work i went to start my truck and it ran like crap.It was missing,the engine was shakeing,it sounded like a rod was floating in the cyl.or there was air in the injectors and the motor even shut off for a split second like someone turned off the key.After i was letting it idle or 5 min you could start to hear the engine smooth out a little.Drove for 10 min on the freeway and got on it in my 80 tune and it felt like my stock setting.Pulled on the side of the road of another 5 min and let it idle also notice that my egt was a little more then 400 in ldle which it is always 250-300.took it to my friends shop and put it on the scanner....no codes and the truck runs much better now.I will call Jody and ask him what he thinks.
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Joined: Jul 2008
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From: Morehead, Ky.
I had a similar scenario last fall. Missed for a few miles and then quit missing. We were in Yellowstone, and I drove it around there all day, no problems. Next gay same thing. Next day, hooked up the 5ver and it started missing, but didn't stop. Stopped at
Western Diesel in Cody Wy. They put in a harness and valve cover gasket. Cured the problem.
Western Diesel in Cody Wy. They put in a harness and valve cover gasket. Cured the problem.
Cargo Master
Joined: Jun 2003
Posts: 3,292
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From: Ardenvoir, Washington
Did you SES light come on when it was running rough ? If so, there will be a code stored.. Not all scanners will give you the proper fault codes for our engine. It might be the under valve cover connector is becoming loose... Sometimes it make contact and sometimes not..
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From: OAHU,KANEOHE HAWAII
well there were no codes for UVH only for PCM which is from the chip and intake heater which is from the AIH delete.The funny thing is you could hear the idle get softer while it was idling.
Cargo Master
Joined: Feb 2005
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Bad fuel? I recently had a scenario similar to yours and the cause was a mixup at the station where 93 octane was in their diesel tank.
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First thing I would check would be the wiring harness that sets on top of the driver side valve cover. The wires get worn through and the harness will short out. I bolt holds it together and it is easy to access. If the wires are showing signs of wear, black tape will get you by until you get a new harness.
My truck did something similar, I replaced IPC, CPS and the truck was still acting up. The harness was my culprit.
Good luck.
My truck did something similar, I replaced IPC, CPS and the truck was still acting up. The harness was my culprit.
Good luck.
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Posting Guru
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From: OAHU,KANEOHE HAWAII
There were no codes for the UVH and like i said it started to run and sound better from when i first started it.If it were the UVH it would be a on of thing right?or would it get better over time.Anyway i have some vids of it.the first two is taken about 5 mins after it started.By the time i took the video it started to clear up.the last one is how it usually starts.
YouTube - Idle
YouTube - Video from My Phone
YouTube - Video from My Phone
You can here the knock and see how the engine was missing,I talk to James a DP tuner and he said i should try and clean my IPR and see how it goes from there.If any one wants a good write up on how to clean the IPR just let me know, James sent me a good write up.
YouTube - Idle
YouTube - Video from My Phone
YouTube - Video from My Phone
You can here the knock and see how the engine was missing,I talk to James a DP tuner and he said i should try and clean my IPR and see how it goes from there.If any one wants a good write up on how to clean the IPR just let me know, James sent me a good write up.
Posting Guru
Joined: Apr 2009
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From: Northern Idaho
Not necessarily. You see if your harness under the valve cover is coming loose or is not seated correctly then it will not get 100% of the voltage it needs to make the injector or injectors fire correctly, plus with the engine wiggling around it will cause it to connect, disconnect, connect, disconnect and so on. This may or may not throw a code.
You really need to pull the valve covers, check ALL your connections to the injectors or have your fuel checked. Bad fuel or gas in your fuel can cause issues too.
You really need to pull the valve covers, check ALL your connections to the injectors or have your fuel checked. Bad fuel or gas in your fuel can cause issues too.
Posting Guru
Joined: Apr 2009
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From: Northern Idaho
BTW, I just noticed when i labeled that picture i labeled it wrong. If you look right above where the line connects to the circle you'll see the quarter in place before i cut it so the valve cover would fit back on.
