Problem: Explain your problem in concise language (ie: Cranks but won’t fire). Cranks, fires, runs, and then dies at random. Throws a code 18 when it dies.
Demographics: The IP is a 5068, with a matching PCM. Its an 'F' engine with the 'GM Goodwrench Crate Motor" stickers on the valve covers. FTB done. Previous Owner says there are about 70k miles on the engine. I reproduced the stalling tonight, it was about 85 F out. Vitals on the truck when it died -
Coolant temp - 202.4 degrees, Injection timing actual - 25, Injection timing desired - 4, IAT - 103. I have my fuel pressure gauge teed in between the Filter and IP, Showing a steady 4.5 PSI and holds there even after truck stalls.
- Year: 1994
- Truck model and class (ie: c2500) Blazer (k1500)
- Automatic
- Mileage: (indicate miles or km) 215,000 Miles on the Odometer
- Replaced parts and mods: Again, according to the previous owner - 9k miles on IP, PCM as well at that time.
- Model: ‘S’ or ‘F’ engine, NA or Turbo, EGR? F, Turbo, No EGR
- Ambient outside temp: (indicate *C or *F) 85 or 90ish F it felt like, it was just after sun down here in balmy AZ
- What fuel are you using? #2 Diesel
- What fuel additives are you using? I havent driven the truck yet.... I can of sea foam in with the 10 or so gallons of #2 that were in the tank
- Where are you located? Coolidge, Az
General maintenance: inspect and evaluate the condition of each. When were they last changed?
- Air filter? New
- Fuel filter? New
- CDR Valve? New
- Coolant – last flushed/replaced at: just done
- Oil – synthetic/regular, changed at 15/40 shell rotella also just done
- Batteries – state of charge, (matched set) replaced at Matched set, New, 0 miles, showing 12.7 V with truck off
- Battery cables and grounds (removed, cleaned and tightened): New 00 cables, stainless bolts and jamnuts(no factory ends) New crimps and heat shrink ring terminals at the back of passenger head, also seconday 4 gauge ground from passengers battery to same head stud. new 4 gauge grounds replacing the flat braid cable from head to frame to body.
- Glow Plugs - how many miles on them? Unknown- but she starts like right now with only 4 plugged in. What type? factory G9 I belive
- Injectors - last changed at Unknown
History: (Describe how the problem first appeared.)
- What were you doing when it happened? Buying the truck from the poor broke bastard.
- How was the truck running fine before this problem appeared? Hasnt even been registered in a year.
- Has this problem ever happened before? Unknown
- Describe any related factors that might be part of the problem. PCM was mounted to the IP, I moved it to a intake mouned cooler from SS Diesel (yeah yeah price was right I know its not optimal)
- Have you checked for DTC (Diagnostic Trouble Codes)? (Y.N) Y as stated above. And? 18
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? Isnt that the GP light?
1f] Does your glow plug light come on? Yes For how long? 5 or 6 seconds.
1g] Do you see smoke from the exhaust while cranking? What color? None
1h] Does the Service Engine Light Glow during Start/bulb check? Yes
2] Fuel Issues (if not running):
2a] Can you hear your lift pump working? Yes
2b] Do you get a steady flow of fuel from the water drain (T-handle) ? Yes
2c] Loosen the inlet line from the IP – is fuel coming out (Lift Pump on)? Yes
2d] Loosen an injector line and crank the engine - does fuel come out? Yes
2e] Do you hear a vacuum (hiss) when you remove the fuel cap? No
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? None
3c] Condition of grounds / ground wires to IP / PMD. Check Harness. Good
3d] PMD Make: Standyne
3e] PMD Age: Unknown
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) It was sitting in the driveway idling last time it stalled
4c] Does pouring cool water over the IP seem to help with restarting? No need, starts right up.
4d] Is stalling momentary (engine recovers)? No, sounds like someone reached over and shut off the truck.
4e] Does SES light come on when engine hiccups? Yes
4f] Does cruise control quit working when engine hiccups? Unknown
4g] Does re-starting seem to reset engine, restoring cruise and power? If you key off then start yes. If you just crank without cycling to Off it goes limp mode.
4h] Changes to dash lights or instruments during stalling events? SES light
5] Running Issues
5a] On cold start, does upper rad hose get hard before engine warms up? No
5b] Any bubbles or oil film in coolant overflow tank? No
5c] Any white slime on oil surfaces (dipstick, CDR, oil Fill cap)? No
5d] Excessive white smoke from exhaust on cold start? No
5e] Excessive black smoke from exhaust under hard acceleration? No
6] Performance Issues
6a] Do you have gauges (boost, EGT) ? Just my laptop and fuel pressure gauges.
6b] Maximum boost under load? not driveable
6c] Have you added a performance PCM (reflash) or Chip? no
6d] Have you changed exhaust / downpipe / crossover? Downpipe
6e] Wastegate – mechanical or vacuum (OEM)? OEM
7] Temperature-related Issues:
7a] Single or dual thermostats? Single
7b] Have you replaced them lately? Manufacturer of replacements? New, stealer
7c] Have you pulled and cleaned Radiator and coolers lately? Yep
7d] Have you replaced the fan clutch? Manufacturer of replacement? Nope
7e] (winter) Have you tested your antifreeze? Good to what temp? 0 F
7f] (winter) Are you using a winter grille cover? Nope
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.
Demographics: The IP is a 5068, with a matching PCM. Its an 'F' engine with the 'GM Goodwrench Crate Motor" stickers on the valve covers. FTB done. Previous Owner says there are about 70k miles on the engine. I reproduced the stalling tonight, it was about 85 F out. Vitals on the truck when it died -
Coolant temp - 202.4 degrees, Injection timing actual - 25, Injection timing desired - 4, IAT - 103. I have my fuel pressure gauge teed in between the Filter and IP, Showing a steady 4.5 PSI and holds there even after truck stalls.
- Year: 1994
- Truck model and class (ie: c2500) Blazer (k1500)
- Automatic
- Mileage: (indicate miles or km) 215,000 Miles on the Odometer
- Replaced parts and mods: Again, according to the previous owner - 9k miles on IP, PCM as well at that time.
- Model: ‘S’ or ‘F’ engine, NA or Turbo, EGR? F, Turbo, No EGR
- Ambient outside temp: (indicate *C or *F) 85 or 90ish F it felt like, it was just after sun down here in balmy AZ
- What fuel are you using? #2 Diesel
- What fuel additives are you using? I havent driven the truck yet.... I can of sea foam in with the 10 or so gallons of #2 that were in the tank
- Where are you located? Coolidge, Az
General maintenance: inspect and evaluate the condition of each. When were they last changed?
- Air filter? New
- Fuel filter? New
- CDR Valve? New
- Coolant – last flushed/replaced at: just done
- Oil – synthetic/regular, changed at 15/40 shell rotella also just done
- Batteries – state of charge, (matched set) replaced at Matched set, New, 0 miles, showing 12.7 V with truck off
- Battery cables and grounds (removed, cleaned and tightened): New 00 cables, stainless bolts and jamnuts(no factory ends) New crimps and heat shrink ring terminals at the back of passenger head, also seconday 4 gauge ground from passengers battery to same head stud. new 4 gauge grounds replacing the flat braid cable from head to frame to body.
- Glow Plugs - how many miles on them? Unknown- but she starts like right now with only 4 plugged in. What type? factory G9 I belive
- Injectors - last changed at Unknown
History: (Describe how the problem first appeared.)
- What were you doing when it happened? Buying the truck from the poor broke bastard.
- How was the truck running fine before this problem appeared? Hasnt even been registered in a year.
- Has this problem ever happened before? Unknown
- Describe any related factors that might be part of the problem. PCM was mounted to the IP, I moved it to a intake mouned cooler from SS Diesel (yeah yeah price was right I know its not optimal)
- Have you checked for DTC (Diagnostic Trouble Codes)? (Y.N) Y as stated above. And? 18
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? Isnt that the GP light?
1f] Does your glow plug light come on? Yes For how long? 5 or 6 seconds.
1g] Do you see smoke from the exhaust while cranking? What color? None
1h] Does the Service Engine Light Glow during Start/bulb check? Yes
2] Fuel Issues (if not running):
2a] Can you hear your lift pump working? Yes
2b] Do you get a steady flow of fuel from the water drain (T-handle) ? Yes
2c] Loosen the inlet line from the IP – is fuel coming out (Lift Pump on)? Yes
2d] Loosen an injector line and crank the engine - does fuel come out? Yes
2e] Do you hear a vacuum (hiss) when you remove the fuel cap? No
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? None
3c] Condition of grounds / ground wires to IP / PMD. Check Harness. Good
3d] PMD Make: Standyne
3e] PMD Age: Unknown
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) It was sitting in the driveway idling last time it stalled
4c] Does pouring cool water over the IP seem to help with restarting? No need, starts right up.
4d] Is stalling momentary (engine recovers)? No, sounds like someone reached over and shut off the truck.
4e] Does SES light come on when engine hiccups? Yes
4f] Does cruise control quit working when engine hiccups? Unknown
4g] Does re-starting seem to reset engine, restoring cruise and power? If you key off then start yes. If you just crank without cycling to Off it goes limp mode.
4h] Changes to dash lights or instruments during stalling events? SES light
5] Running Issues
5a] On cold start, does upper rad hose get hard before engine warms up? No
5b] Any bubbles or oil film in coolant overflow tank? No
5c] Any white slime on oil surfaces (dipstick, CDR, oil Fill cap)? No
5d] Excessive white smoke from exhaust on cold start? No
5e] Excessive black smoke from exhaust under hard acceleration? No
6] Performance Issues
6a] Do you have gauges (boost, EGT) ? Just my laptop and fuel pressure gauges.
6b] Maximum boost under load? not driveable
6c] Have you added a performance PCM (reflash) or Chip? no
6d] Have you changed exhaust / downpipe / crossover? Downpipe
6e] Wastegate – mechanical or vacuum (OEM)? OEM
7] Temperature-related Issues:
7a] Single or dual thermostats? Single
7b] Have you replaced them lately? Manufacturer of replacements? New, stealer
7c] Have you pulled and cleaned Radiator and coolers lately? Yep
7d] Have you replaced the fan clutch? Manufacturer of replacement? Nope
7e] (winter) Have you tested your antifreeze? Good to what temp? 0 F
7f] (winter) Are you using a winter grille cover? Nope
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.