Revisiting Surging Problem - Dodge Diesel

stonewalldiesel · 03-18-2004, 04:18 PM

Well, went to dealer today and they replaced lift pump. FP increased to 15psi idle, 12psi cruising. Took on Hwy same surging problem occurring after 110KM per hour still. Took it back to dealer, now they are talking about replacing injector pump. I explained to the mechanic about the info I gathered from you guys regarding the possibility of the APPS being funky, He told me that it is a restricted item???? What is that supposed to mean? I told him yesterday I was driving on Hwy at 110km on cruise to make sure it was still doing it before I took it in, I turned off cruise and Pushed the pedal and there was absolutly no response. Almost like the engine was powerless I pulled over and started going again and everything was fine???? I'm at a loss. I don't believe that the Injector pump is the problem if I'm getting the pressure readings that I'm getting. The problem only occurs under high speed(load). He did a computer check and it showed no faults. He did say that when he checked it last week there was an error reading fuel timing fault,but it's not there now. I wonder if it erased when I tried the APPS reset procedure that someone posted???Any help on this would be greatly appreciated

jrs_dodge_diesel · 03-19-2004, 08:19 AM

Sounds to me like your injection pump (VP44). If it was your APPS, you would have the problem at all speeds, even when pushing the pedal down in neutral. I believe its your VP44 not being able to keep up with engine demand for fuel. The VP44 has been known to give problems like this. Even if it has good pressure going to it.

Good luck to you. Hope you get it fixed soon.

stonewalldiesel · 03-19-2004, 12:48 PM

Thanks, That makes sense to me now, I just talked to the dealer and they have ordered a new pump should be in next week.

jrs_dodge_diesel · 03-19-2004, 01:14 PM

Glad to help. Good to hear that it's gettin fixed soon to.

03-19-2004, 08:19 AM	#2
jrs_dodge_diesel Administrator Join Date: Nov 2003 Location: Newport, RI Posts: 4,006 My Photo Gallery My Classified Ads	Sounds to me like your injection pump (VP44). If it was your APPS, you would have the problem at all speeds, even when pushing the pedal down in neutral. I believe its your VP44 not being able to keep up with engine demand for fuel. The VP44 has been known to give problems like this. Even if it has good pressure going to it. Good luck to you. Hope you get it fixed soon. __________________ J.R. U.S. Coast Guard , Electronics Technician 1st class Extra class Amateur radio operator - K5DTR 2001½ SLT 2500 2WD, auto, short bed Hi-flow banjo bolts FASS DDRP Scotty Air II Isspro EGT (pre-turbo),fuel pressure, boost, and transmission temperature (sensor in hot line) guages

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03-19-2004, 12:48 PM	#3
stonewalldiesel Registered User Join Date: Dec 2003 Location: Stonewall Manitoba Canada Posts: 114 My Photo Gallery My Classified Ads	Thanks, That makes sense to me now, I just talked to the dealer and they have ordered a new pump should be in next week.

03-19-2004, 01:14 PM	#4
jrs_dodge_diesel Administrator Join Date: Nov 2003 Location: Newport, RI Posts: 4,006 My Photo Gallery My Classified Ads	Glad to help. Good to hear that it's gettin fixed soon to.