z06_vette
11-09-2009, 10:19 AM
Hello everyone,
Truck specs: 1994 K3500 Ext cab dually, 6.5l turbo, 121k miles, 3" turbo downpipe, 4" ss exhaust back to rear of truck, newer alternator, MX7000 lightbar, new marine injectors, glow plugs, controller, FSD cooler intake mounted, dual thermostat housing, 190* stats, new fuel filter 1 week prior to problems.
Long story short, I traded for a 1994 Chevy K3500 dually about 4 months ago from a gentleman in Washington for a 4900 4 car rolldeck.
Bought it as is and pretty much sight unseen or test driven. Roughly 115k miles on the odometer. After I started driving the truck, I first changed the oil over to a full synthetic 15w40. I have now driven it 6k miles with no problems until 2 Fridays ago. Wife took the truck to go to Menards to buy some house project items, made it roughly 35 miles from home and said the truck lost power and began to have a small noise.
She returned home, I listened to the truck and it sounds like a lifter type noise but I also noticed that it was missing. I pulled codes, 93, 94, 95 were listed. Thinking about the misfire and knowing the injectors most likely had 120k on them and reading several places that 100k for injectors is normal life, I removed all 8 injectors and tested them. 4 tested REALLY BAD, 5 & 7 tested bad, the rest were marginal but leaned toward faulty.
Ordered 8 new marine injectors from SSDiesel Supply along with 8 new glow plugs and a new controller. Once they arrived, installed all new parts, new gaskets started it up and let it run for roughly 10 minutes but nothing changed. The noise was still present and so was the misfire. I thought I had performed the injector air bleed correctly but maybe I did not and hence the reason why I have my misfire yet. The noise still puzzles me though. Warm or cold does not matter, seems to change directly with RPMs.
It sounds like it is on the right side of the engine, so I pulled the right hand valve cover again and let the truck run without the cover on. With my visual inspection, all valve train components appear to be working fine. I have also performed a compression test on cylinders 1-4, 425, 350, 400, 350 respectively.
Since instaling the injectors I have not re-scanned the PCM for codes. I have tried to switch PMD's but no change. I have not tried to rebleed the fuel system to see if that would change anything. Anyone have any ideas? I would really hate to have to pull a head but thinking that is most likely the next step. Do I have too low of compression on the right hand bank (350, 350) causing the misfire and noise? Do I have like Tony (GMC 6.5TD Guy) a piece embedded into the piston?
Any help or additional thoughts would be greatly appreciated.
Thanks,
Jason
Truck specs: 1994 K3500 Ext cab dually, 6.5l turbo, 121k miles, 3" turbo downpipe, 4" ss exhaust back to rear of truck, newer alternator, MX7000 lightbar, new marine injectors, glow plugs, controller, FSD cooler intake mounted, dual thermostat housing, 190* stats, new fuel filter 1 week prior to problems.
Long story short, I traded for a 1994 Chevy K3500 dually about 4 months ago from a gentleman in Washington for a 4900 4 car rolldeck.
Bought it as is and pretty much sight unseen or test driven. Roughly 115k miles on the odometer. After I started driving the truck, I first changed the oil over to a full synthetic 15w40. I have now driven it 6k miles with no problems until 2 Fridays ago. Wife took the truck to go to Menards to buy some house project items, made it roughly 35 miles from home and said the truck lost power and began to have a small noise.
She returned home, I listened to the truck and it sounds like a lifter type noise but I also noticed that it was missing. I pulled codes, 93, 94, 95 were listed. Thinking about the misfire and knowing the injectors most likely had 120k on them and reading several places that 100k for injectors is normal life, I removed all 8 injectors and tested them. 4 tested REALLY BAD, 5 & 7 tested bad, the rest were marginal but leaned toward faulty.
Ordered 8 new marine injectors from SSDiesel Supply along with 8 new glow plugs and a new controller. Once they arrived, installed all new parts, new gaskets started it up and let it run for roughly 10 minutes but nothing changed. The noise was still present and so was the misfire. I thought I had performed the injector air bleed correctly but maybe I did not and hence the reason why I have my misfire yet. The noise still puzzles me though. Warm or cold does not matter, seems to change directly with RPMs.
It sounds like it is on the right side of the engine, so I pulled the right hand valve cover again and let the truck run without the cover on. With my visual inspection, all valve train components appear to be working fine. I have also performed a compression test on cylinders 1-4, 425, 350, 400, 350 respectively.
Since instaling the injectors I have not re-scanned the PCM for codes. I have tried to switch PMD's but no change. I have not tried to rebleed the fuel system to see if that would change anything. Anyone have any ideas? I would really hate to have to pull a head but thinking that is most likely the next step. Do I have too low of compression on the right hand bank (350, 350) causing the misfire and noise? Do I have like Tony (GMC 6.5TD Guy) a piece embedded into the piston?
Any help or additional thoughts would be greatly appreciated.
Thanks,
Jason