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stalling........

RichieUnuk

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Location
Calgary,AB
Problem: Explain your problem in concise language (ie: Cranks but won’t fire). __stalls, but starts again, pmd mounted on intake with cooler__________________________

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

- Year: __2000__
- Truck model and class (ie: c2500) _____k2500____
- Automatic or Standard __auto________
- Mileage: (indicate miles or km) _______190000km__
- Replaced parts and mods (IP, PMD, chip/PCM, TM, injectors etc) ___________
- Model: ‘S’ or ‘F’ engine, NA or Turbo, EGR? _____turbo_________
- Ambient outside temp: (indicate *C or *F) ___0 c_______
- What fuel are you using? (#1 Diesel, #2 Diesel, Bio, VO, WVO, etc) ____ number 2_____
- What fuel additives are you using? ___________
- Where are you located? ______Canada_______

General maintenance: inspect and evaluate the condition of each. When were they last changed?
- Air filter ______1 month ago___
- Fuel filter ______1 month ago___
- CDR Valve? _________
- Coolant – last flushed/replaced at _____________
- Oil – synthetic/regular, changed at ___regular, 1000km ago________
- Batteries – state of charge, (matched set) replaced at ___1 yr ago__________
- Battery cables and grounds (removed, cleaned and tightened): ____________yes__
- Glow Plugs - how many miles on them? _________ What type? _____________
- Injectors - last changed at _______________


History: (Describe how the problem first appeared.)
- What were you doing when it happened? ___driving___________
- How was the truck running fine before this problem appeared? _____________
- Has this problem ever happened before? __yes_____________________
- Describe any related factors that might be part of the problem. ______________
- Have you checked for DTC (Diagnostic Trouble Codes)? (Y.N) _y___ And? ____no codes____


Diagnostics:

1] Starting:
1a] Does the engine start? _______y__
1b] Does the engine crank over? _______y_
1c] Are your batteries fully charged? _______y__
1d] Have you removed, cleaned, and tightened all battery connections? _____n___
1e] Does your Wait to Start light come on for a time? How long? ____15 sec_____
1f] Does your glow plug light come on? _________ For how long? _________
1g] Do you see smoke from the exhaust while cranking? What color? ________
1h] Does the Service Engine Light Glow during Start/bulb check? ________

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) intake___________
3b] Condition of Extension harness (if used) Vendor or Homemade? ____vendor_____
3c] Condition of grounds / ground wires to IP / PMD. Check Harness. ________good_
3d] PMD Make: ___stnadyne________
3e] PMD Age: ___2yrs__________

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

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? _______
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 (boost, EGT) ? ___________
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 (OEM)? ______________

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? ___________

List and describe any other factors which are not addressed in this checklist. We can’t see, hear, smell, or touch your truck, so the more descriptive information you can give, the more likely it is that somebody can assist you.
 
my 95 did that and I carried a spare pmd switch it over and the prob went away. these pmd's are very strange no warning what so ever!
 
Do the fuel delivery test on no 2 just to make sure that you don't have any LP trouble?

Otherwise, 2 years on the intake may be it for the PMD. Unfortunately, most people took the easy way out of not relocating PMD all the way out of the engine compartment.
 
Had that problem. Got a DTech PMD mounted it on the front bumper and no more problems! It's so nice not to stress about the pmd stalling any more!!
 
i would put money on pmd, but also check all your grounds and make sure they are all clean under them. especially your body to chassis ground
 
Would be good to know if your lift pump is working. Those questions arent answered. test the lift pump for pressure at idle.

IF you have LP working then I would suspect PMD. IF PMD doesnt fix it would be looking at possibly the fuel shutoff solenoid on the IP.
 
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