Engine/Transmission (1998.5 - 2002) I’m begging could some one please help? I’m have a major problem

[grass hopper]

I’m begging could some one please help? I’m have a major problem (UP DATE)

Could some please help me this is really wearing on me & my wife?



I have a '99 3500 4x4 w/only a edge ez so mostly stock 5spd standard.

What i am having going on is. After driving the truck for a few miles (just long enough to get it up to temp) turning it off to go into the store when i get back into the truck and start it to leave it will start up just fine (some times the LP will come on & some times it will not) and idle like it should but as soon as i put a little pressure on the pedal the motor will rev (like if i just put the pedal to the floor). But as soon as i let off it will come back down and idle. it will keep doing this until it cools down. After it cools i can go back to driving until i turn it off again and it will start all over.



Things i have replaced

VP-44 (fuel injection pump)(1. 5 years ago from II) (had II check the 44 out to see if it was still ok about 5 months ago and it was)



Two LP's (Lift pump) along w/the bigger fuel line kit and moved it to the rear (1st one 1. 5 years ago and the second one about 6 months ago)



Fuel filter (6 months ago)



APPS (accelerator pedal position sensor)(4 months ago)



CKP (crankshaft position sensor)(4 months ago)



Cleaned (intake manifold air temperature sensor)(two day ago)



RWAL speed sensor (4 months ago)



Replaced both battery’s (yesterday)



Replaced the clutch & hydraulics (1 month ago)



Most of the relays (last week)



Ignition switch (4 months ago)



Had a shop scan the truck three day ago (the only code was P1693) no other code



I did not replace all of these parts because of this problem i am having now. Most were replaced to fix other problems i had with the truck and it helped them. But i just can’t think of any other parts i could replace that would fix the problem in hand now.



After doing all that and replacing all of these parts my truck still does not act right. Could some one please help? (i know i should blow it up and get a new one ;>)



Could the apps i replaced about 4 months ago be going bad this soon. i got this new from the dodge house. How long of a life do these things have?



Oh by the way mine will over revving (after it's up to temp) if you touch the pedal.



thank you Edwin. K

 

[Oasis-3]

May be the TPS is going bad



Cliff

 

[grass hopper]

Do you think the one i replaced a short time ago could go bad that fast? i sure hope not because it was not cheap but on the other hand that would be nice to finally be done with this headache

 

[DCreed]

unfortunately the TPS would likely act up regardless of engine temp. The 1693 is a companion, you do have more codes. Try the local Texas forum and see if a SMARTY or other decent code reader can be used.

 

[Cummins724]

I would unhook the EZ & see if that helps. Then clean all grounds & check all connections on every plug on the entire engine. Then if the problem is still there, I would check voltage at the APPS & reset it. Try to find a Smarty local to check codes. This could be a Ecm problem.

 

[dclassens]

I may be wrong but I think the APPS and the TPS are the same part(TPS is slang for APPS on diesels). I know there is a set up procedure on the APPS. The problem was there before the APPS swap, so it may be something else. Recalibrate the APPS, verify fuel pressure with good gauge and the do the wire trace on items that are involved in that circuit. If you have a known good VP and good fuel pressure, it must be wiring or sensors. Good luck and give us an update.



Dave

 

[ThrottleJockey]

Try another ECM to see if it acts like yours.

 

[grass hopper]

SORRY I FOR GOT TO PUT THIS ON THE 1ST PAGE.

I tried getting with some one from around here but no one replyed to my add

(asking if some one would scan my truck)



Tried unhooking the EZ & that did not help (three day ago)



Checked & cleaned all grounds & made sure all connectors were good (3 days ago)



checked voltage at the pcm on the passengers side (orange wire w/purple tracer 5. 0V) then the apps it's telling me 5. 1 (or some thing like that) then tried the key on hook battery's back up then push pedal to the floor slowly then back up slowly (3 day ago) (still does not help)



Things i have not replaced yet. Would any of these make the truck act like this? Or would one be more likely then an other?



ECM (?) (does something important)



MAP (manifold air pressure sensor)



ECT (engine coolant temperature sensor)



FHT (fuel heater temperature sensor)



IATR (intake manifold air heater relays)



IAT (intake manifold air temperature sensor)



CMP (camshaft position sensor)

 

[grass hopper]

Try another ECM to see if it acts like yours.

i don't have a extra one nor do i know any one with one that i could try that. wish i did. i do have my old apps and tried hooking it up but it still does the same thing. so i kind of don't think its that but at this point i don't know what it could be. i am about to give up on it. but a part of me keeps trying to get it fixed. man i hope no one ever has this happen to them. but if i get it fixed then i will let evry one know what to do to fix theres.

 

[ThrottleJockey]

SORRY I FOR GOT TO PUT THIS ON THE 1ST PAGE.

I tried getting with some one from around here but no one replyed to my add

(asking if some one would scan my truck)



Tried unhooking the EZ & that did not help (three day ago)



Checked & cleaned all grounds & made sure all connectors were good (3 days ago)



checked voltage at the pcm on the passengers side (orange wire w/purple tracer 5. 0V) then the apps it's telling me 5. 1 (or some thing like that) then tried the key on hook battery's back up then push pedal to the floor slowly then back up slowly (3 day ago) (still does not help)



Things i have not replaced yet. Would any of these make the truck act like this? Or would one be more likely then an other?



ECM (?) (does something important)



MAP (manifold air pressure sensor)



ECT (engine coolant temperature sensor)



FHT (fuel heater temperature sensor)



IATR (intake manifold air heater relays)



IAT (intake manifold air temperature sensor)



CMP (camshaft position sensor)

This is kinda funny and I'll tell you why. You know ALL of these contacts and grounds and connectors and sensors and wires and crap your'e checking ALL ROUTE TO AND WORK FOR THE ECM. If your truck has a brain, this is it.



Try this, it's free and easy. Disconnect BOTH batteries for 2 hours. Hook them back up. Drive and see if it repeats. (I'll bet it does) but hey, it's free.



It's the ECM. I feel it in my bones.

 

[grass hopper]

This is kinda funny and I'll tell you why. You know ALL of these contacts and grounds and connectors and sensors and wires and crap your'e checking ALL ROUTE TO AND WORK FOR THE ECM. If your truck has a brain, this is it.



Try this, it's free and easy. Disconnect BOTH batteries for 2 hours. Hook them back up. Drive and see if it repeats. (I'll bet it does) but hey, it's free.



It's the ECM. I feel it in my bones.

i unhooked them last night & let them set over night. this morning hooked them back up and drove to wal mart to get some thing got back in the truck started up just fine but it did it again. so i gues its the ECM. do you think that its been going out slowly for some time with all the sensors i have replaced and with my milage droping over the years?

 

[grass hopper]

This is kinda funny and I'll tell you why. You know ALL of these contacts and grounds and connectors and sensors and wires and crap your'e checking ALL ROUTE TO AND WORK FOR THE ECM. If your truck has a brain, this is it.



Try this, it's free and easy. Disconnect BOTH batteries for 2 hours. Hook them back up. Drive and see if it repeats. (I'll bet it does) but hey, it's free.



It's the ECM. I feel it in my bones.

one more thing ifs the ECM were would be a good place to get one & would you get it new or used?

 

[hcole]

How about this? Our manual transmission trucks have a signal coming from the ECM telling the engine to speed up if you put too much load on the engine for the APPS position. Try starting it up and do NOT put your foot on the accelerator, then put it in gear and try to move forward. If the truck runs away, then that tells me it is in the ECM. Hope this helps.

 

[grass hopper]

How about this? Our manual transmission trucks have a signal coming from the ECM telling the engine to speed up if you put too much load on the engine for the APPS position. Try starting it up and do NOT put your foot on the accelerator, then put it in gear and try to move forward. If the truck runs away, then that tells me it is in the ECM. Hope this helps.

i had to do that to get home from walmart this morning. it would not take off like it does when you put your foot on the brakes why'll its in gear. it takes off just like it should when your idleing and let your foot off of the clutch then after it start to roll i will put it in 3rd and give it gas. i guess the load of the truck boggs the motor just enuff that it will not over rev but as soon as it chaches up with the truck it will take off like a batt out of ___ then it will act like it runs out of fuel and the truck will kick and buck if you don't push in the clutch. one thing i did notice is that if you keep applying the pedal why'll its moving it does not seem to act like its running out of fuel. but man there is only so mean miles of strait away be for you have to shut her down.

 

[JAG1]

I'm just a complete greenhorne, but, could it be the overflow valve on the return fuel line going bad? Some are located behind the vp44, where the return line comes out the vp, and others are at the 't' in the return lines near the rear of the engine head. Also I question the vp44 electronics..... does anyone know what its function is on the vp?



just trying to help if I can... ... ... ... .

 

[grass hopper]

I'm just a complete greenhorne, but, could it be the overflow valve on the return fuel line going bad? Some are located behind the vp44, where the return line comes out the vp, and others are at the 't' in the return lines near the rear of the engine head. Also I question the vp44 electronics..... does anyone know what its function is on the vp?



just trying to help if I can... ... ... ... .

so are you thinking that the valve is getting stuck when the truck gets warm?those are good question but i think i will need a guru to answer these.

 

[grass hopper]

oh by the way i just want to say THANK YOU to everyone that has put up a suggestion IT DOES HELP.

 

[DCreed]

you should be able to "fool" the ECM by using a resistor at the temp sensor. there is a thread on this in the 24v engine forum under "miss only with edge on ... fixed!" lots of good info!

 

[JBodenhamer]

I have heard of the actual pedal assembly going bad. Somewhere on here there was a post a year or so ago about how to drill a hole in the side of it to clean the contacts if you were having problems. Normally the problem with the pedal internal contacts acts like a "dead pedal" rather than your problem, but it is possible. It seems to me that your ECM might be it. Normally they function by measuring two different pedal potentiomenters that have to agree to get the desired throttle(fueling for us) input, and if these do not agree, some designs will fault to a zero but others can fault to full open.

Good luck with this.

P. S. I am in Pflugerville. If you have no luck and are ready to hit it with a hammer, you can give me a ring at 254-291-5202 I am no diesel super expert but a decent mechanic in general.

 

[grass hopper]

if it was the apps or the ECM would't it set a code? when i had it checked there were no code leading to any of these sensors or ECM.

hamer i mite give you a call if some thing does not show up soon ;>) i go threw

P-Ville just about every day my son go's to PHS played freshman football for them. the V team boys played one hell of a game this pass season you got to be proud of your town. any how i will let ya'll know if some thing shows up but please keep the suggestion coming. thanks