newbee...need help with my H1

[alpha_one]

i have a 2000 H1 6.5 l turbo diesel.....it just started acting up on me ....sometimes stalled but started rite up but sometimes it takes awhile to start ,and before all this happenned it had a APP code but i cleared but never come back on again also today when i hooked up a scanner i went into "DATA" there is one part it said (PCM in VTD fail_yes) Anyone might know ,pls help

 

[Acesneights1]

Do a search on PMD failures. Post more info. I suggest doing the diagnostic checklist in the sticky section,

 

[packratt]

Fill out the checklist http://www.dieseltowingresource.com/showthread.php?t=6300 and your signature so we know what we are dealing with.

 

[DieselCash]

i have a 2000 H1 6.5 l turbo diesel.....it just started acting up on me ....sometimes stalled but started rite up but sometimes it takes awhile to start ,and before all this happenned it had a APP code but i cleared but never come back on again also today when i hooked up a scanner i went into "DATA" there is one part it said (PCM in VTD fail_yes) Anyone might know ,pls help

Welcome to DTR! :thumbsup:

 

[alpha_one]

2000 H1 stalled

Problem: Explain your problem in concise language (ie: Cranks but won’t fire). Stalled but start right up sometimes take 2 or 3 starts

Demographics: tell us about your truck and your ambient conditions:

- Year: 2000
- Truck model and class (ie: c2500) _H1________
- Automatic or Standard __auto________
- Mileage: (indicate miles or km) __84k miles_______
- Replaced parts and mods (IP, PMD, chip/PCM, TM, injectors etc) __PDM a year ago_________
- Model: ‘S’ or ‘F’ engine, NA or Turbo, EGR? __6.5 l_turbo___________
- Ambient outside temp: (indicate *C or *F) __________
- What fuel are you using? (#1 Diesel, #2 Diesel, Bio, VO, WVO, etc) _________
- What fuel additives are you using? ___none________
- Where are you located? ___san jose ___ca_______

General maintenance: inspect and evaluate the condition of each. When were they last changed?
- Air filter _________
- Fuel filter __a month_______
- CDR Valve? __no idea_______
- Coolant – last flushed/replaced at ____a year_________
- Oil – synthetic/regular, changed at ____regular_______
- Batteries – state of charge, (matched set) replaced at _____________
- Battery cables and grounds (removed, cleaned and tightened): __yes____________
- Glow Plugs - how many miles on them? __84k_______ What type? ___dont know__________
- Injectors - last changed at ___no I dea____________


History: (Describe how the problem first appeared.)
- What were you doing when it happened? ___start up or driving___________
- How was the truck running fine before this problem appeared? ___one time I stepped on the gas I felt nothing but idle then I pulled on the side turned off started and it runs fine …pulled the code it has an “APP” accelerator pedal position code cleared it never come back on again __________
- Has this problem ever happened before? _the APP problem never happened before but the stalling problem….. yes it did about a year ago but it was under warranty so I don’t know what the dealer did they dint tell me______________________
- Describe any related factors that might be part of the problem. ______________
- Have you checked for DTC (Diagnostic Trouble Codes)? (Y.N) _y___ And? __as now it has no code since I cleared the (APP) code which is about two months ______


Diagnostics:

1] Starting:
1a] Does the engine start? _yes________
1b] Does the engine crank over? __yes______
1c] Are your batteries fully charged? __yes_______
1d] Have you removed, cleaned, and tightened all battery connections? ___yes_____
1e] Does your Wait to Start light come on for a time? How long? __about 10 secs_______
1f] Does your glow plug light come on? __yes_______ For how long? __10secs_______
1g] Do you see smoke from the exhaust while cranking? What color? ________

2] Fuel Issues (if not running):
2a] Can you hear your lift pump working? ____________
2b] Do you get a steady flow of fuel from the water drain (T-handle) ? ________
2c] Loosen the inlet line from the IP – is fuel coming out (Lift Pump on)? ___________
2d] Loosen an injector line and crank the engine - does fuel come out? _________
2e] Do you hear a vacuum (hiss) when you remove the fuel cap? ___________

3] PMD / IP Issues
3a] Location of PMD (on pump, on intake, remote mounted) ____on intake_______
3b] Condition of Extension harness (if used) Vendor or Homemade? ___vendor______
3c] Condition of grounds / ground wires to IP / PMD. Check Harness. _________
3d] PMD Make: ___________
3e] PMD Age: ___a year__________

4] Stalling Issues
4a] Do you experience stalling only when hot? _sometimes 5 mins after started up _________
4b] Does it stall under particular circumstances? (ie hit bump, or on accel) _no_____
4c] Does pouring cool water over the IP seem to help with restarting? ___no______
4d] Is stalling momentary (engine recovers)? __no_______
4e] Does SES light come on when engine hiccups? __no_______
4f] Does cruise control quit working when engine hiccups? ___no________
4g] Does re-starting seem to reset engine, restoring cruise and power? _________
4h] Changes to dash lights or instruments during stalling events? ___no________

5] Running Issues
5a] On cold start, does upper rad hose get hard before engine warms up? _______
5b] Any bubbles or oil film in coolant overflow tank? _no______
5c] Any white slime on oil surfaces (dipstick, CDR, oil Fill cap)? __________
5d] Excessive white smoke from exhaust on cold start? _________
5e] Excessive black smoke from exhaust under hard acceleration? __________

6] Performance Issues
6a] Do you have gauges? ___________
6b] Maximum boost under load? ____________
6c] Have you added a performance PCM (reflash) or Chip? ______________
6d] Have you changed exhaust / downpipe / crossover? ________________
6e] Wastegate – mechanical or vacuum? ______________

7] Temperature-related Issues:
7a] Single or dual thermostats? _________
7b] Have you replaced them lately? Manufacturer of replacements? ________
7c] Have you pulled and cleaned Radiator and coolers lately? ___________
7d] Have you replaced the fan clutch? Manufacturer of replacement? ________
7e] (winter) Have you tested your antifreeze? Good to what temp? __________
7f] (winter) Are you using a winter grille cover? ___________

 

[Acesneights1]

PMD on the intake...Ughhh. where'd you buy it SS Diesel ? That is a good place to start. Putting it on the intake is worse than leaving it on the IP. You need to relocate outside the engine compt. Both Heath and PMDcable.com sell kits as well as others. Some guys even make thier own. I would start there.

 

[DieselSlug]

So where is the spot to put the PMD on an H1? Since there is no bumper "nostrils". Kinda just phazed me.....
Got any pics of the H1? Im interested in seeing it...

 

[alpha_one]

thanks ..........i will start from there

 

[docdray]

just to clarify, moving it once its on its way out does no good-unfortunately. a
new pmd MAY be in order. where is it currently mounted? also can you verify fuel pressure?

 

[Rodd]

before replacing the PMD (with it on your manifold you will need to replace it sooner rather than later because of heat soak. It gets hotter on the manifold than it does mounted to the pump) with your truck running open up the T-valve on the top front of your engine. Put the hose in an empty water bottle first then open the T-valve. Fuel should flow and the truck should continue running. If it dies then the problem is the Lift Pump. If it doesn't it is probably the PMD. When was the last time you replaced your fuel filter?

 

[buddy]

The PMD could be the problem, it also might not be, dont throw all your eggs in one basket. Lift pump pressure is an important check.

 

[JMJNet]

Questions on section 2, will verify if you have a running LP.

LP is probably the most overlooked item, however, if you look at the top thread in this forum, you can see several thread about modified LP and fuel pressure gauge.

You can change the PMD all day but if the LP is bad, you have no chance also.

 

[Acesneights1]

LP test is good. Sorry I jumped to PMD when I heard intake mounted. It's 90% of the time the reason.

 

[buddy]

I dont think PMD on the intake is 90% of the time the issue. 90% of the time it gets relocated and a new one bought because everyone says its the issue.

EDIT: I will add that relocating it is a good idea, I just don't like that jumping to conclusions period of about 2 dozen posts before the new PMD is in and there is still an issue.

 

[Acesneights1]

I dont think PMD on the intake is 90% of the time the issue. 90% of the time it gets relocated and a new one bought because everyone says its the issue.

.

If it isn't it will be soon. His sure sounds like it to me but hey you take it from here.

 

[alpha_one]

so i picked one up ( PMD) from dealer , i've been driving the truck all day so far no problem...

 

[Acesneights1]

Where is it mounted ? If you put it back on the intake it won't last long. Having never worked on a H1 before I'm not sure where you could remote mount it but somehow get it out of the enginebay. PMDcable.com sells the extension harness. You can reuse your heatsink.

 

[alpha_one]

i ordered one from Ebay it about 6ft long .......................thank you so much guys

 

[NVW]

i ordered one from Ebay it about 6ft long .......................thank you so much guys

If you ordered from EDAM you may get a dud. He has other user names that I can't remember but he ships out of Quebec.

Leo

 

[Acesneights1]

Yeah, I got a dud from ebay once. Can't remember who. Good luck.