Replace Injection Pump?
Have been living with the DTC 35/36 trouble code for thousands of miles now. Only driveability issue is with the cruise control which shuts off when the SES light blinks on. I've tried everything else, like replacing the lift pump, relocating the PMD under the front bumper, swapping out the PMD, rechecking all of the grounds, new fuel filter, gallons of diesel-clean, etc. I'm thinking it must be optical sensor.
Except for that, the truck runs better than new. After installing Heath's recommended chip upgrage 5 years ago, it starts quickly with little or no smoke and runs in all kinds of weather better than ever before.
What would you do? Should I leave well-enough alone or do an expensive pump replacement? Is there any other reason to change out the pump other than to have cruise control?
Black 95 6.5TD, 929 block, 173k miles, 65k on IP, 48k miles on self-rebuilt engine done in '09, 6 L&S Full-torque inserts in outer main crank holes, Clearwater heads, Fluidamper, rebuilt NV4500, 3" downpipe, 4" exhaust, no cat, dual T-stats, 9 blade fan, spin-on 180 degree clutch, Heath hi-flow water pump and turbomaster, PMD relocated, OPS relay mod, Heath PROM upgrade, and Kennedy headlight harness upgrade soon. Now use semi-syn Lucas 2-cycle oil every fill-up which greatly reduces the frequency of DTC 35-36 codes the PCM/ECM throws.