Starting on half then stalling
Thread Starter
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Mountain Pass
Joined: Oct 2009
Posts: 214
Likes: 7
From: East Tenn
Well, I tried to redo the injector connectors again, but still have the same problems. The truck runs and drives but clearly at least one cylinder is not firing (6 from the data and buzz test). My last resort is to reinstall the OEM engine wiring harness to remove the new one as a potential problem. Too hot and humid to get it done today.
I did find and try to gather data on the PERDELs but nothing ever showed up in the table or graph.
I did find and try to gather data on the PERDELs but nothing ever showed up in the table or graph.
Cargo Master
Joined: Sep 2015
Posts: 2,860
Likes: 365
Well, I tried to redo the injector connectors again, but still have the same problems. The truck runs and drives but clearly at least one cylinder is not firing (6 from the data and buzz test). My last resort is to reinstall the OEM engine wiring harness to remove the new one as a potential problem. Too hot and humid to get it done today.
I did find and try to gather data on the PERDELs but nothing ever showed up in the table or graph.
I did find and try to gather data on the PERDELs but nothing ever showed up in the table or graph.
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Thread Starter
|
Mountain Pass
Joined: Oct 2009
Posts: 214
Likes: 7
From: East Tenn
Truck was warm and the reader appeared to be transmitting data throughout the test but nothing appeared on the graph or the tables when I looked. The entries were there for all of the cylinders but they all showed 100%.
Thread Starter
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Mountain Pass
Joined: Oct 2009
Posts: 214
Likes: 7
From: East Tenn
Swapped out the wiring harness for the OEM and that helped the way it ran but the codes are the same. Cylinder 6 still showing injector issues, but the buzz test sounded normal. I drove it around and off throttle on the ‘normal’ tune, the motor is skipping and jumping but not dying. On throttle it’s strong and sounds normal. No stumbling on throttle on all the tunes. When on the ‘stock’ tune or the towing tune, it’s way smoother off throttle, almost enough to think it’s running correctly.
So what now? I’m out of ideas and need my truck!
So what now? I’m out of ideas and need my truck!
Lead Driver
Joined: Oct 2005
Posts: 6,129
Likes: 1,919
From: Ponca City, OK
Swapped out the wiring harness for the OEM and that helped the way it ran but the codes are the same. Cylinder 6 still showing injector issues, but the buzz test sounded normal. I drove it around and off throttle on the ‘normal’ tune, the motor is skipping and jumping but not dying. On throttle it’s strong and sounds normal. No stumbling on throttle on all the tunes. When on the ‘stock’ tune or the towing tune, it’s way smoother off throttle, almost enough to think it’s running correctly.
So what now? I’m out of ideas and need my truck!
So what now? I’m out of ideas and need my truck!
Lead Driver
Joined: Oct 2005
Posts: 6,129
Likes: 1,919
From: Ponca City, OK
It's pretty much the equivalent of a momentary push button that tell the PCM you're on the throttle. Just an on or off signal sent to the PCM but it can throw a wrench in the works if it the wrong signal. It's available to view with Forscan.
Thread Starter
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Mountain Pass
Joined: Oct 2009
Posts: 214
Likes: 7
From: East Tenn
So I played around with the DP Tunes today. When driving around in ‘stock’ mode or my towing mode, it’s very difficult to tell anything is wrong, on or off throttle. It runs just about perfectly. Switch it to my normal everyday mode (+80 hp, economy) and all hell breaks loose. That’s when off throttle it’s stumbling and sounds terrible. Plus throttle response is almost like a switch - very abrupt either way - on that tune.
I am trying to get it in my local diesel shop next week. Any other suggestions for them to check?
I am trying to get it in my local diesel shop next week. Any other suggestions for them to check?
