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6.5L Diesel Engine Discuss the 6.5 GM diesel engine & associated components. Automatic transmission questions & problems belong in the 4L80/85 - 4L60E - 6L90 Transmission Forum

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Old 08-06-2019, 02:16 PM   #21 (permalink)
jabon056
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Not yet, all my compression testers won't go high enough for a diesel. I was just checking into a diesel compression tester. The engine only has approx. 480 miles on the rebuild and it ran perfect until it started this running for a minute or 2 then just die, no stutter, just die, would restart after a while and do the same thing. Replaced IP and injectors, now have the current problem.

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1994 Chevrolet C3500 Crew Cab Dually, Automatic, 2004 AM General 6.5 TD, AT Turbo, Kojo chip, 4" exhaust w/modified crossover, remote bumper mounted PMD, 189k on truck, OPS bypass for lift pump, upgraded cooling fan and clutch, remote fuel filter.
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Old 08-07-2019, 11:08 AM   #22 (permalink)
JMJNet
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That is a 3500 truck? It has odd IP model for the 94 truck.
So if you don't replace it with the exact same IP, you need to do some other things like getting the ECM reflashed, etc. before it can work without issue.

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1995 GMC Suburban:
PMD in Bumper
Leroy Diesel Flight System PMD
Leroy Diesel Oil Cooler Line
4" Warpspeed Exhaust
Kennedy Diesel LP/OPS Harness
Bosch Duraterm GP
Heath Turbo-Master
AD244 Alternator
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Old 08-07-2019, 11:54 AM   #23 (permalink)
jabon056
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Years ago I swapped it over to the 5521 pump and bought the proper chip for the pump. Original pump was a 5068, but that went out 8-9 years ago and the swap was made. Currently I have the original 5068 chip, stock chip for 5521, Kennedy program chip for 5521 and a KOJO tune chip for 5521. They all run the same, except 5068 chip, won't start at all, as expected. I am going to install this set of injectors I just had tested, blow out all fuel lines to insure no blockage, change valve cover gaskets and inspect push rods and rocker arms. Start it without intake, if it runs good after that, call it good, if not pull IP and have it checked, have 3 years replacement warranty on it. Also do a compression test on it.
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1994 Chevrolet C3500 Crew Cab Dually, Automatic, 2004 AM General 6.5 TD, AT Turbo, Kojo chip, 4" exhaust w/modified crossover, remote bumper mounted PMD, 189k on truck, OPS bypass for lift pump, upgraded cooling fan and clutch, remote fuel filter.
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Old 08-07-2019, 06:42 PM   #24 (permalink)
TAG
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Fwiw, couple years ago I bought a set of Napa rebuilt injectors. Pop tested them & they were very consistent at 1800 psi & pattern looked good. Good chatter too. Took them apart & nozzles had no markings. I wasn't comfortable with that so bought a set of Marine nozzles from a local stanadyne dealer & set them at 2400 psi. Point being, the Napa nozzles seemed like pretty decent quality & were only around $35 apiece.
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1995 K2500 ECSB 6 lug. 2006 Penninsular 18:1, Diamond Eye 4" exhaust, hx40II, Heath v2.0 chip, A/A intercooler under bumper, custom intake, 285/75/16 all terrains, 3 pod pillar guages, high idle, silverado w/ leather.
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Old 08-07-2019, 11:28 PM   #25 (permalink)
JMJNet
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Not saying it happened to you but there are a lot of DOA parts out there including DOA IP.

So, just because you replace them, does not mean that you replace them with good parts.
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1995 GMC Suburban:
PMD in Bumper
Leroy Diesel Flight System PMD
Leroy Diesel Oil Cooler Line
4" Warpspeed Exhaust
Kennedy Diesel LP/OPS Harness
Bosch Duraterm GP
Heath Turbo-Master
AD244 Alternator
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Old 08-08-2019, 05:32 PM   #26 (permalink)
jabon056
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Actually that is what my next questioned concerned, the IP. I noticed when I installed this IP, when I started the truck, the IP was noisy, made a whirring sound. It caught my attention because I have never heard one make this noise. Since I had just redone the AC just before the old IP went, I thought it might be the AC compressor, but it isn't, the whirring sound is coming out of the valley, by the IP. As much as I hate to tear it down, when I can get it back into the shop, all the little things are going to be fixed,like small leak on valve cover, put the tested injectors in and a new IP.
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1994 Chevrolet C3500 Crew Cab Dually, Automatic, 2004 AM General 6.5 TD, AT Turbo, Kojo chip, 4" exhaust w/modified crossover, remote bumper mounted PMD, 189k on truck, OPS bypass for lift pump, upgraded cooling fan and clutch, remote fuel filter.
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Old 08-09-2019, 09:54 AM   #27 (permalink)
jnlperformance
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Find yourself a certified stanadyne service center near you and have the ip.. or an ip... remanned by them...

https://www.stanadyne.com/dealer-locator/
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