tonkadoctor
Full Access Member
For those that havn't followed my previous thread, here's the quick and dirty...
She starts hard cold, runs great warm. Part of the problem was a worn timing cover and Lube pump which is fixed.
Put on a HP oil gauge, fuel pressure gauge and lube oil pressure gauge today and did a little testing to hopefully rule a few things out.
Me thinks it's time to scrape some do re me together for the injectors and a PCM reflash from Jody as there isn't much else that could cause it. I am quite pleased with the findings on the gauges today and damn glad I did it.
She starts hard cold, runs great warm. Part of the problem was a worn timing cover and Lube pump which is fixed.
- No trouble codes
- Entire GP system tested good
- Oil pressure builds fine now and resevoir stays full
Put on a HP oil gauge, fuel pressure gauge and lube oil pressure gauge today and did a little testing to hopefully rule a few things out.
- Fuel pressure at the filter housing inlet maintains a steady 52 PSI from idle to 90MPH with it floored...Not the greatest but still good...will do a shim mod in the regulator shortly to see if I can get it to maintain a nice 60 - 70 PSI I'll do a regulated return mod down the road as soon as I get lucky and get my paws on an Aeromotive regulator fer about $50 -$60
- HPOP pressure ran a nice 500 PSI at idle and would hold above 2200 - 2400 PSI after spiking to 3000 when keeping it floored so it's OK (did have to shut down my testing earlier than I wanted at 90 MPH when I passed a cop that thankfully didn't mess with me for doing 90 in a 55 on a country road.......Havn't checked the gearing in this truck yet but it was still pulling hard wanting much more at 90 (IIRC 65 is about 2000 rpm so I think it has 3.55 or 3.73 in it.)
- Lube oil pressure stays at 14 PSI warm idle and maintains a nice 40 PSI running 55 mph at about 1800 so this gives me a nice warm fuzzy feeling about the engines bearings and other internals
- Check for oil leaking past the injector poppet valves cold
- Check for armature impact marks on the bottom of the solenoids
- Check armature clearance
- Check for loose poppet valve adjustment screws
- R&R rear main.......Again
- New O-rings in the oil cooler....OOPS wish I did it when it was out.
- New trans pan gasket.....Putting in the correct reusable pan gasket to replace the split cork gasket that was put in by the PO
Me thinks it's time to scrape some do re me together for the injectors and a PCM reflash from Jody as there isn't much else that could cause it. I am quite pleased with the findings on the gauges today and damn glad I did it.
Last edited: