injectors? - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 10 (permalink) Old 02-17-2007, 03:32 PM Thread Starter
 
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injectors?

I have a stalling problem when in traffic, or when tapping on accelorator to move a short distance. Had it in shop to have it scanned, no codes came up.
I put a fuel conditioner in fuel at almost every fill-up. After reading other threads listing similar symtoms I started to wonder about the torque converter. I mentioned this to my mechanic, he seems to think if it were the torque converter we would have recieved a code for it. He is leaning towards an injector problem. Condition seems to worsen after 30-40 minutes of driving. (heat?) Does not happen all the time, seems to come and go. Any thoughts?
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post #2 of 10 (permalink) Old 02-17-2007, 03:59 PM
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More than likely it's one of two things:

Bad Cam Position Sensor (CPS)
Bad UVC harness (harnesses located on the valley side of each valve cover)

Both are common problems and cause similar symptoms to what you are describing.
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post #3 of 10 (permalink) Old 02-17-2007, 04:07 PM Thread Starter
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I forgot to mention one of the things we changed was the cam sensor, so this eliminates that as the culprit. I will have him look into the UVC harness. I have 240,000 miles on the original injectors, do you think this could be the problem?

Thanks
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post #4 of 10 (permalink) Old 02-17-2007, 05:11 PM
 
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It is possible.Does it idle bad?If you are going to go with inj's I would install a set of performance inj's going to run you about the same price if not cheaper.

www.beansdieselperformance.com

Mike
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post #5 of 10 (permalink) Old 02-17-2007, 05:21 PM Thread Starter
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Idle seems fine. Just the stalling. Starts right up after the stall.

Thank you for your input.
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post #6 of 10 (permalink) Old 02-17-2007, 05:39 PM
 
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Stalling could also be the IPR on the HPOP.If you have a code reader or something to monitor the IPR Duty cycle and ICP Psi.Run a buzz test on the inj's and a cyl cont test.That should give you a start on what parts might need to be replaced.
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post #7 of 10 (permalink) Old 02-17-2007, 05:53 PM Thread Starter
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Thanks for your response. This one has my mechanic stumped. Doesn't stall when he has it. No codes stored when he scans it. We ran around one day with the scanner hooked up, but the truck wouldn't stall. Happens after prolong use.
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post #8 of 10 (permalink) Old 02-17-2007, 06:02 PM
 
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flat arse stall wouldn't be inj's.Not that I would think.I would start looking at IPR.IPR duty cycle souldn't exceed 65% or so at WOT and about 10-15% at idle.ICP has to be a minimum of 500psi to even idle correctly.Inj PW is around 1.5 at idle.Bad IPR will cause a stall especially when warm or hot.

Inj's would cause erratic idle or a hard miss failed buzz test and cyl cont test.ICP would also cause above.Foamy oil or bad oil or low oil level would cause a erratic idle with a stall.CPS would cause a stall with a hard restart sometimes and loss of RPM's while cranking in 2001's and older years.

I am just throwing out what I know.Or claim to know from what I have learned with my own truck
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post #9 of 10 (permalink) Old 02-17-2007, 06:05 PM Thread Starter
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Thanks for all of your replies, trying to fill my head with as much info as possible, you have been a great help.
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post #10 of 10 (permalink) Old 02-17-2007, 06:10 PM
 
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Your welcome
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