Engine/Transmission (1998.5 - 2002) Now power for the first mile

[DEP5]

Finally hung a temporary fuel pressure gauge this morning. 30psi liquid filled from NAPA, 4ft hose, gauge perched temporarily on dash for a driving test. 13psi at idle, drops to 8psi on medium grade.



1 minute warm up, then drove truck 1-1/4 miles, blue smoke, acted like it had no pedal or turbo although I was able to get it up to 2500 rpm. Fuel gauge read 10 psi during this time then predictably it took off like scared deer, outside temp-48 degrees. only code is P1693 . . . p done



Acts like this every day, at every cold start.



Thanks dp

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early 2001 3500 4x4 QuadCab Cummins HO 6-speed , dented tailgate

 

[MCharlebois]

my vp-44 would have a dead pedal every now and then. . never knew when you would get it but it would show the same symptions you have . . drove my truck for over a year like that. . might go 3 weeks in between and then 5 times in one day... got sick of wonderin when it was going to puke and bought one... my guess is the truck would still be running today with an occasional dead pedal

good luck

marcel

 

[JaySummers]

guys, I replaced the VP44 with a used one. It took care of the problem. Everything seems ok now. It appears that this is the answer. .

 

[ihegdal]

I had this problem on my "01" a couple of years ago and eventually fixed it with a MAP sensor replacement.



My theory was that the MAP sensor developed a temperature sensitivity problem. The truck is parked in a garage during the winter (about 65 F) , right after leaving the garage everything was fine, after about a minute (outside air temp at -10 F) the pedal would go about 90% dead. I was thinking that the cold air cooled of the intake manifold (and MAP sensor). After driving a couple of miles with the dead pedal the problem would go away for as long as the engine remained fairly warm. The colder it was outside the farther I had to drive before the problem cleared up. I assumed that eventually enough heat was coming off the engine to warm the MAP sensor up above the temperature sensitivity threshold.

 

[Todd T]

looks like no one has an answer to our problems.

maybe someone can chime in and help. weather is getting colder and it

seems to get worse when cold.

They all (ABOVE) have bad injection pumps! you'll find each has either a bad pump ECU (heat related) or a problem in the high pressure solenoid valve.

 

[DEP5]

They all (ABOVE) have bad injection pumps! you'll find each has either a bad pump ECU (heat related) or a problem in the high pressure solenoid valve.

On the Contrary . .

My truck has ran progressively worse since I last posted. I found I could turn the key off and on to get it to run better, apparently this action would reset the computer to a default condition, would work for a few minutes, enable the truck to be driven at speed. If I didn't do something it would only run about 30 mph. Yet, when it is fully warmed up then it would run like a bear. About ready to leave it somewhere with the keys in the ignition . .



Yesterday, at the shop, on a hunch, I disconnected the MAP sensor and started the engine to see what would happen. The engine warning light came on. I turned the engine off, doped the connector with dielectric grease and plugged it back onto the MAP sensor. Started the engine, the warning light was still on. I drove it home, changed clothes and restarted the truck. The engine warning light was out. I drove it about 15 miles and it ran great. Later, I went out and restarted it about 6 hrs after parking it. Ran fine, drove it about 10 miles. No sign of blue smoke, dead pedal or turbo lag.



This morning it was 32F. I went out and started it and after short warmup I took it for a drive. Ran flawlessly.



So, what happened? Did the MAP sensor connector oxidize causing the computer to get bad readings?



I have read hundreds of posts trying to find a "look alike". The knee jerk reaction is replace the VP44.



I am starting to think that most of the advice you read on here is worth what you pay for it. I guess anecdotal evidence logically leads to anecdotal advice.



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early 2001 3500 4x4 QuadCab Cummins HO 6-speed , dented tailgate

 

[MCagle]

My 01 is doing what yall say yours is doing. The dead pedal is occasional though, may just be in the early stages. I don't have to shut off and restart though, if I just give it a little time it picks up and then the power is normal.



Have you ever noticed it other than in the mornings. Occasionally mine does it after it has recently been running.

 

[PatrickHenry]

My 01 seems to be worse when the temperature outside is cold. I was driving to p/up son and when driving in to a 0 degree windchill it would constantly (let off pedal and nothing, had to turn key off and on)get the dead pedal. On way home (50 mile trip) truck would only get the dead pedal when below 60. Is it possible that a sensor is bad and not just the vp44? Should I replace MAP and IAT sensors? Also could there be a sensor in transmission causing this problem? Oh, it was 20 degrees with a 20-25 mph wind and snowing.

 

[MCagle]

Mine doesn't seem to be temperature sensitive. I drove it hunting before day this past week it preformed flawlessly. Then I got in it to come home and had a dead pedal, only for a few seconds though. It's not as cold here as you described though. It was probably in the 30's that morning.

 

[Willys]

Any updates? Anyone replaced the VP yet?

dephenicie, is your truck still running well after cleaning the map sensor connector?