Engine/Transmission (1998.5 - 2002) looking for good diesel mechanic

[BSmalley]

I have a 2001 with 95K miles with 6 spd. Truck has thrown a couple of codes and was running poorly. I was able to diagnose a lift pump that was failing and contrary to what the so called diesel tech at my local Dodge Dealer told me, as soon as I replaced the pump, that particular problem went away. Now truck is coming up with new codes and running terrible. I have a friend that has a scan tool and we plugged it in to get the codes/troubleshooting steps. I'm looking to see if anyone out there knows a good diesel tech that I could possibly call with some questions. Any help would be appreciated. .

 

[Huff N Puff]

You could post your questions here,its what this sites is about. Please PM me with your questions. Merv

 

[SnoKing]

On a 2001, you can cycle the key three times and get a read out of code on the speedo/Mileage window. Got P0216? Sounds like it. Injector pump time! SNOKING

 

[BSmalley]

Help

OK, I'n not real computer literate so I'm not sure how to PM anyone. I just tried to type a response to some answers I got, but the site said I wasn't logged in... after I had just logged in, Oh well here goes again. . MY 2001. 5 QC 6 spd HO. I bought almost a year ago and have put 18K on it since then. A few weeks ago, I determined, by doing the key thing 3x's and the fuel pressure guage, that my lift pump was on its way out. Went to my local Dodge Dealer and saw thier alleged diesel tech. To make a long story short, tech didn't seem to know very much about diesels... even less than me which is hard to believe!! He insisted the lift pump was fine. He also broke my fuel pressure guage line. After much quiet discussion, I left with my truck w/o new pump and broken guage. Order new lift pump and installed it myself with a friend as well as fixed the guage. Pressure is back to normal ranges. Went on long trip and truck started setting codes. Got them off the odo and they are as follows in the order they came up.

PCU-P0500, P1693

ECU-P0236, P0112, P0121, P1693, P0216, P1488



Looked up in my service manuals and most of them seem to be low voltage. Have checked batteries, charging system and cleaned contacts of cables. Yesterday the truck was only setting both the PCU codes and the P0112, P1693, and P1488. On a long trip last week the truck did set the P0121 and the throttle went dead. shut truck off and when I restarted it, the MIL was out and the code was gone and the throttle was back... Anybody have any ideas... . I'm lost now.....

Thanks,

Bill

 

[SnoKing]

I believe that you will be installing an injector pump shortly. Find a good dealer. Should be warranty item along with the lift pump. That is providing the pump wire is not pierced! SNOKING

 

[BSmalley]

If it is the injector pump, would that cause all the other codes I'm showing?? I thought it might be something electrial...

 

[RHARVEY]

Where do you live???



Rick

 

[BSmalley]

I believe that you will be installing an injector pump shortly. Find a good dealer. Should be warranty item along with the lift pump. That is providing the pump wire is not pierced! SNOKING

Another question... Can the pump wire be pierced by something in the truck. . Is there a common spot to look for that. I have not tapped that wire for anything.

 

[BSmalley]

Where do you live???



Rick

About as far from you as possible and still be in the USA... I live in very northern NH.

 

[SnoKing]

P0236 Turbocharger Boost Pressure Sensor Performance / Rationality

P0112 Intake Air / Charge Temperature Sensor Low

P0121

Accelerator Pedal Position Sensor Signal Volts Do Not Agree w/Idle Validation Signal

P0216

Fuel Injection Pump Timing Failure

P1488





Aux. 5 Volt Output Too Low

P0500

No Vehicle Speed Sensor Signal - This is the sensor on top of the rear differential.



You should clean all the ground connections on the batteries, engine and body. There are a lot! But P0216 is not good!!!!

 

[BSmalley]

P0216

Fuel Injection Pump Timing Failure





You should clean all the ground connections on the batteries, engine and body. There are a lot! But P0216 is not good!!!![/QUOTE]



When I looked in the manual at the P0216 it said caused by High fuel restriction. . I'm guessing that means plugged fuel filter?? just put new one in. . OR caused by Low fuel pressure... I'm guessing that is the lift pump?? also just replaced last week.

Is there a place in the manual that gives the locations for all the grounds??

 

[SnoKing]

Another question... Can the pump wire be pierced by something in the truck. . Is there a common spot to look for that. I have not tapped that wire for anything.

Piercing the pump is how a fueling box like an Edge Comp effects the fuel delivery. The piercing is on done at the injector pump as follows with Edge instructions.



11. The stock wiring harness is located by following it from the center of the six fuel supply tubes up to the top rear of the pump. The upper two wires-slide the protective covering downward to expose these wires. Install the supplied pin connector lower half with trough onto the wire closest to the engine block, this is the top inner wire.



This is after you remove the APPS and air intake horn.



To check just look here, without removing anything.



If you look at the pump from near the brake unit and under the air intake horn you will see this view. Yellow line goes to pump wire. Look to see it it has been messed with!



Snoking

 

[BSmalley]

OK Snoking, Thanks for that... great Pic. Will check in the morning. I'm pretty sure nothing has ever been done to this truck before I got it. All I've done so far is install a pyro and FP guage. ( and the lift pump).

Bill

 

[Huff N Puff]

Snoking is right,anytime you get multiple codes,the first thing to check is all the grounds. Don't just look at them,take them apart clean all surfaces of the connection down to clean metal. Next issue to look at is the charging system,first clean the battery cables,then test the battery. Next test the alternator,it should test total output and test the diodes.

 

[BSmalley]

Also, forgot to mention... When I had truck hooked up to scan computer, brand new Snap-On unit OBDIII?? with diagnostic troubleshooting in it, at an idle it was saying my boost was in the 28-32 psi range..... That seems WAY out of line from where it should be... I have a friend who has a 95 12v that he has worked quite a bit and he can push 39-40 psi under WOT... ... my truck, stock, computer was saying 49-55 psi when truck at 1800-2000 rpm in neutral... ... what could be causing this? BTW we did try two different scan computers.

 

[BSmalley]

Is the regulator in the alternator? someone told me that it is in the PCM... . I checked the alternator and with truck running at idle, output was 12. 5 volts. Batteries seem OK with load test and did clean all connections on batteries. .

 

[SSkinner]

Hi BSmalley,

From what I understand from your description you have had a running problem with no fuel psi to start with. You fixed the low side fuel problem with new lift pump and fuel filter. Now your still having a running problem. Everyone is leading you in the right direction. Snoking is right about the P0216 code. This is almost positively a bad injection pump, this code is caused by internal pump failure. Now that the low side fuel system is working. the injection pump is the only fuel delivery control unit left. But you listed a apps doesn't agree with validation signal this is generally caused by internal apps sensor failure. These are two seperate problems. By your trucks description the injection pump s/b covered under the 5year/100000 mile basic diesel warranty to the best of my knowledge. If it was me I would record your codes, erase the codes, and see which codes return. If P0216 returns get a new pump install before you're out of warranty. Best of luck!

 

[SnoKing]

they do not make boost at idle or in neutral. Maybe the map sensor. Clean the grounds first. On my truck there appears to be at least three ground points off each battery. SNOKING

 

[Huff N Puff]

Is the regulator in the alternator? someone told me that it is in the PCM... . I checked the alternator and with truck running at idle, output was 12. 5 volts. Batteries seem OK with load test and did clean all connections on batteries. .

To BSmalley you need to get the batteries properly tested a load test is not the only test. The battery is the filter that cleans the electicity headed to all the components in your truck. You also need to completely test the alternator. A total amprage output is another test, it should be over 120amps, you also need to test the diodes with a ripple test 200milivots of ripple is OK you'd like it less than 100milivolts. If you don't have the nessesary equipment take it to a local shop. The alternator is controlled by the PCM.

 

[SSkinner]

Was wondering what you found with the problems on your truck. Are you back up and running?