Intermittent SES light

[illville]

sorry to keep bothering with questions, but the '95, now after driving for a week, runs great. at slow speeds and ~17-1800 RPM, he SES light comes on. give it throttle or let off, it goes away. 60+ mph its just fine. also, if you are running it on cruise, and it kicks off, the next time you try to go anywhere its in limp mode. this also happens with the truck not shutting off. could the ECM be causing this? the PO said the truck was doing this, he said it was running 3500 rpm at 55 mph no wonder he blew it up!

I currently just started having the intermittent SES light issue about a month ago. It started when the temperature started to drop for the winter. Started right before i noticed my OPS had crapped out and my LP wasnt running, but after the recent FRC-10 swap it stopped for about a week. Unfortunately it came back, so far is only happening until my truck gets up to Temp and when it comes on if i let off or accelerate it goes away and i have no noticeable loss of power but my cruise control will kick off. im going to hook up my extra PMD to see if that fixes it but i will be pulling the codes later today. Other than that my truck runs like a beast with no issues especially with my new Heath EProm.

 

[ak diesel driver]

might check your boost and IAT sensors.

 

[illville]

might check your boost and IAT sensors.

Ok thanks ill look into that. Its about 55° outside today and after a ten minute drive no SES light coming on. So far it seems to be limited to the colder days

 

[Turbine Doc]

Illville I moved your posts to their own thread it is easier to track a problem in it's own thread, once you find the codes post them your description is too broad to do much more than throw out a bunch of guesses.

 

[illville]

Illville I moved your posts to their own thread it is easier to track a problem in it's own thread, once you find the codes post them your description is too broad to do much more than throw out a bunch of guesses.

OK Thanks, just got the code and unfortunately its 36. I also went to swap out my PMD with my extra but come to find out my extra is bad lol.
The good news for the day is that with the warm weather we are having my truck has not thrown a code today at all and still runs like a champ.

 

[illville]

Year: _1994_____
- Truck model and class (ie: c2500) ____K2500 Chevy Suburban_____
- Automatic or Standard ___Auto_______
- Mileage: (indicate miles or km) ___190K______
- Replaced parts and mods (IP, PMD, chip/PCM, TM, injectors etc) ___FTB, Heath EPROM, TM, Full top end rebuild minus IP at 170K________
- Model: ‘S’ or ‘F’ engine, NA or Turbo, EGR? ____"F" Turbo__________
- Ambient outside temp: (indicate *C or *F) ____high of 55F today______
- What fuel are you using? (#1 Diesel, #2 Diesel, Bio, VO, WVO, etc) ___Diesel______
- What fuel additives are you using? ____Power Services_______
- Where are you located? _____Kennewick, WA (Eastern Washington)________

General maintenance: inspect and evaluate the condition of each. When were they last changed?
- Air filter ____Clean AFE_____
- Fuel filter ____Clean WIX & new WIX pre filter_____
- CDR Valve? ___Changed at 170K______
- Coolant – last flushed/replaced at _____170K________
- Oil – synthetic/regular, changed at _____Mobile Delvac 15W-40______
- Batteries – state of charge, (matched set) replaced at ______New pair as of 11-1-2012_______
- Battery cables and grounds (removed, cleaned and tightened): ______all that applied were cleaned and tightened at 170K________
- Glow Plugs - how many miles on them? ____20K_____ What type? _____Duraterm________
- Injectors - last changed at ______Bosch at 170K_________


History: (Describe how the problem first appeared.)
- What were you doing when it happened? ______intermittent SES (code 36) light after seasonal cold spell started around 40 degrees or below________
- How was the truck running fine before this problem appeared? _____was a little sluggish previously due to OPS failure which i have fixed by installing new OPS, FrC-10 Walbro, and Kennedy LP harness________
- Has this problem ever happened before? _________no______________
- Describe any related factors that might be part of the problem. ____Im still running the original Map, Boost and IAT sensor, my PMD is also used but has not given me any problems in the last 20K miles________
- Have you checked for DTC (Diagnostic Trouble Codes)? (Y.N) __Y__ And? ___Code 36_____

 

[ak diesel driver]

DTC 36 - Injection Pulse Width Error (Time Long)

try adding a quart of nd30wt or 2 stroke oil to the fuel. if it helps it's probably just buying you time until you need a new IP. Should be used every fill up to lube the IP

 

[illville]

DTC 36 - Injection Pulse Width Error (Time Long)

try adding a quart of nd30wt or 2 stroke oil to the fuel. if it helps it's probably just buying you time until you need a new IP. Should be used every fill up to lube the IP

Thanks, i always use additive but i have never used the 2 stroke which i did add along with power services today at fill up. So far with the warmer weather the last couple of days the code has not shown up again but well see what happens as the temperature is scheduled to drop into the upper 30's by friday. I am also going to pick up a spare PMD just to rule that out since the one currently installed was a used Ebay unit i bought a few years ago.