Foehammer
Member
- Messages
- 60
- Reaction score
- 0
Hey guys, havent been on here in a long while, been laid up on disability. Anyways here is my problem:
Problem: Explain your problem in concise language (ie: Cranks but won’t fire). Throws code 36 only when headlights are on, voltage meter shows less than 14, prob less than 12 at night. heard somewhere low voltage could cause code 36____________________________
Demographics: tell us about your truck and your ambient conditions:
- Year: 1994
- Truck model and class (ie: c2500)K1500
- Automatic or Standard: Auto
- Mileage: (indicate miles or km) 200K Miles
- Replaced parts and mods (IP, PMD, chip/PCM, TM, injectors etc) Dtech PMD bumper mounted, turbomaster, hiflow air filter, new plugs, new injectors Egr delete, air plenum casting removal-
Model: ‘S’ or ‘F’ engine, NA or Turbo, EGR? Egr deleted
- Ambient outside temp: (indicate *C or *F) 40* at night 60* day F
- What fuel are you using? (#1 Diesel, #2 Diesel, Bio, VO, WVO, etc) #2 diesel
- What fuel additives are you using? 1/2 qt 30wt, amsoil cetane booster, amsoil diesel treatment, every tank
- Where are you located? Las Cruces NM
General maintenance: inspect and evaluate the condition of each. When were they last changed?
- Air filter cleaned and reoiled recentlly
- Fuel filter New
- CDR Valve? 2yrs old
- Coolant – last flushed/replaced at don't know
- Oil – synthetic/regular, changed at regular 2months ago
- Batteries – state of charge, (matched set) replaced at Charged up, matched, 4 months old
- Battery cables and grounds (removed, cleaned and tightened):
- Glow Plugs - how many miles on them? less than 1500 milesWhat type? Bosch Extended glow
- Injectors - last changed at less than 1500 miles ago
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?running fine
- Has this problem ever happened before? yes
- Describe any related factors that might be part of the problem. driving at night with lights on
- Have you checked for DTC (Diagnostic Trouble Codes)? (Y.N) YAnd? code 36
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? y
1e] Does your Wait to Start light come on for a time?y How long? 10 secs
1f] Does your glow plug light come on? y For how long? 10 secs
1g] Do you see smoke from the exhaust while cranking? yWhat color? white 1/2 sec then black 1/2 sec ill warms up1h] Does the Service Engine Light Glow during Start/bulb check? y
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) remote mount
3b] Condition of Extension harness (if used) Vendor or Homemade? new harness
3c] Condition of grounds / ground wires to IP / PMD. Check Harness. seems ok3d] PMD Make: Dtech
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) n
4c] Does pouring cool water over the IP seem to help with restarting? n/a
4d] Is stalling momentary (engine recovers)? _________
4e] Does SES light come on when engine hiccups? _________
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? n
5b] Any bubbles or oil film in coolant overflow tank? n
5c] Any white slime on oil surfaces (dipstick, CDR, oil Fill cap)? n
5d] Excessive white smoke from exhaust on cold start? n
5e] Excessive black smoke from exhaust under hard acceleration? n
6] Performance Issues
6a] Do you have gauges (boost, EGT) ? boost gauge
6b] Maximum boost under load? around 10 psi
6c] Have you added a performance PCM (reflash) or Chip? n
6d] Have you changed exhaust / downpipe / crossover? n
6e] Wastegate – mechanical or vacuum (OEM)? Turbomaster
7] Temperature-related Issues:
7a] Single or dual thermostats? single
7b] Have you replaced them lately? Manufacturer of replacements? last yr, dont know
7c] Have you pulled and cleaned Radiator and coolers lately? no
7d] Have you replaced the fan clutch? Manufacturer of replacement? no
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.
Anyways I heard somewhere that low voltage can trick the pcm into code 36, dont remember where i heard it. This only seems to happen at night when my headlights are on and my voltage isnt' steady at 14 or above, even during the day, it fluctuates between 12 and 14, but at night it drops below 12 sometimes, could my voltage be the culprit?:skep:
Problem: Explain your problem in concise language (ie: Cranks but won’t fire). Throws code 36 only when headlights are on, voltage meter shows less than 14, prob less than 12 at night. heard somewhere low voltage could cause code 36____________________________
Demographics: tell us about your truck and your ambient conditions:
- Year: 1994
- Truck model and class (ie: c2500)K1500
- Automatic or Standard: Auto
- Mileage: (indicate miles or km) 200K Miles
- Replaced parts and mods (IP, PMD, chip/PCM, TM, injectors etc) Dtech PMD bumper mounted, turbomaster, hiflow air filter, new plugs, new injectors Egr delete, air plenum casting removal-
Model: ‘S’ or ‘F’ engine, NA or Turbo, EGR? Egr deleted
- Ambient outside temp: (indicate *C or *F) 40* at night 60* day F
- What fuel are you using? (#1 Diesel, #2 Diesel, Bio, VO, WVO, etc) #2 diesel
- What fuel additives are you using? 1/2 qt 30wt, amsoil cetane booster, amsoil diesel treatment, every tank
- Where are you located? Las Cruces NM
General maintenance: inspect and evaluate the condition of each. When were they last changed?
- Air filter cleaned and reoiled recentlly
- Fuel filter New
- CDR Valve? 2yrs old
- Coolant – last flushed/replaced at don't know
- Oil – synthetic/regular, changed at regular 2months ago
- Batteries – state of charge, (matched set) replaced at Charged up, matched, 4 months old
- Battery cables and grounds (removed, cleaned and tightened):
- Glow Plugs - how many miles on them? less than 1500 milesWhat type? Bosch Extended glow
- Injectors - last changed at less than 1500 miles ago
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?running fine
- Has this problem ever happened before? yes
- Describe any related factors that might be part of the problem. driving at night with lights on
- Have you checked for DTC (Diagnostic Trouble Codes)? (Y.N) YAnd? code 36
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? y
1e] Does your Wait to Start light come on for a time?y How long? 10 secs
1f] Does your glow plug light come on? y For how long? 10 secs
1g] Do you see smoke from the exhaust while cranking? yWhat color? white 1/2 sec then black 1/2 sec ill warms up1h] Does the Service Engine Light Glow during Start/bulb check? y
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) remote mount
3b] Condition of Extension harness (if used) Vendor or Homemade? new harness
3c] Condition of grounds / ground wires to IP / PMD. Check Harness. seems ok3d] PMD Make: Dtech
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) n
4c] Does pouring cool water over the IP seem to help with restarting? n/a
4d] Is stalling momentary (engine recovers)? _________
4e] Does SES light come on when engine hiccups? _________
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? n
5b] Any bubbles or oil film in coolant overflow tank? n
5c] Any white slime on oil surfaces (dipstick, CDR, oil Fill cap)? n
5d] Excessive white smoke from exhaust on cold start? n
5e] Excessive black smoke from exhaust under hard acceleration? n
6] Performance Issues
6a] Do you have gauges (boost, EGT) ? boost gauge
6b] Maximum boost under load? around 10 psi
6c] Have you added a performance PCM (reflash) or Chip? n
6d] Have you changed exhaust / downpipe / crossover? n
6e] Wastegate – mechanical or vacuum (OEM)? Turbomaster
7] Temperature-related Issues:
7a] Single or dual thermostats? single
7b] Have you replaced them lately? Manufacturer of replacements? last yr, dont know
7c] Have you pulled and cleaned Radiator and coolers lately? no
7d] Have you replaced the fan clutch? Manufacturer of replacement? no
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.
Anyways I heard somewhere that low voltage can trick the pcm into code 36, dont remember where i heard it. This only seems to happen at night when my headlights are on and my voltage isnt' steady at 14 or above, even during the day, it fluctuates between 12 and 14, but at night it drops below 12 sometimes, could my voltage be the culprit?:skep:
. Test drove the truck , and am showing 14.06V with the headlights and radio on. Oh yeah, this is also the original alternator, 105amp Delco Remy, so I dont think 14.06V is too bad. I am going to add another 4awg wire going to the passnger side batt just for extra current, and will be replacing the 