Recent Content by DrDeltic

Sorry to hear your all-too-familiar story. Had a recent similar VP44 story on a '99 2500 4X4 48RE chasing calibration was confusing, but I may have learned: Bosch stipulates calibration of FPCM on the injection pump on rebuilding, done in the Bosch test bench while calibrating according to Bosch...

JR Probably ECM/PCM problem from the start. Followed the "most likely" route first after consulting with rebuilder and presenting symptoms and data. I agree with you on your observation about ANY brand at 18-years of service (this one at 240K miles). This one had an ECM replaced under warranty...

Nigel, Sorry about the delay. Unplugging the temp sensor did nothing. Except change the temp reading on the dash guage. Appreciate your suggestion and efforts. william

JR your info appears to true also from my supplier. Bosch has changed their repair order program for those in the re-man business who are authorized to re-build their units with their warranty. Bosch says they can re-use the injection pump electronics 3-times, re-programming each time to match...

Nigel, Thank you. Good info. Didn't try it. I will report tomorrow. Did you ever run down the reason for the pump electronics failure? Electronics on both remans are new Bosch.

JR, Thank you. Pin 6 is 0-volts/battery ground Pin 7 is 12-volts. I reported amps on both for current flow documentation: good power supply, good ground, enough to deliver required amout for full functionality. Basically just a note for the curious. Again, thank you.

'99 VP44 fresh Bosch re-man, lift pump new, 12psi supply pressure @inlet line to VP44 VP44 # 6 & 7 terminals/pins both show 3-3.5 amps when running hot. No Start hot. pull the VP44 electrical plug and power the unit with 12-volts + & -, starts right up HOT, plug harness back in, cranks and NO...

WayneM popcorn. I like that. Some enjoy the show. us dummies put on the show, others like to watch. Hope they enjoy the show. i believe this is a weird one. AE couldn't tell me if 04.5 should show KOEO Fuel Rail Pressure at these figures as "normal" i trusted it at first, not knowing any...

WayneM update? No. AE engineer told me nothing would change to help at all as I updated in June. He said they did nothing to Cummins dx for HPCR with this update. I believed him. "Fixed rail pressure under any circumstance" you ask? evidently not. since rail pressure as reported by FPS through...

WayneM sorry. You are right, I answered "0" I unplugged the FCA and answered "0" looking at FCA current, NOT FPS psi. My bad. Sorry, Wayne. when I did what you said to do, scanner says same 7700-8000 psi range as plugged in, as cranking with no start, and as running momentarily on 5. the scanner...

P-Bar thank you. Good thought. the latest: unplugged FCA changed fuel flow enough for truck to fire on 5 - had #1 supplying mechanical gage to read pressure un-tainted by goofy PCM strategy of PID rules, which I still don't know. Wish I had some of this and/or raw data verifiable at sensors and...

Good question. KOEO rail pressure reads 0. Added info: assembled a mechanical 10,000-psi gage to plug into CP3 out line to rail. Rail and all injector lines still off the engine, also Rail Pressure Sensor, temp sensor on manifold, UN-plugged cranking after priming with in-tank pump, FCA still...

Anyone seen this one? fresh Bosch reman CP3, new in-tank pump supplies 17-18 psi with no fuel flowing (dead-headed pressure) cranking flows 15psi on supply side to CP3 scan tool pressure reads 77XX-8000 psi from pressure sensor pressure sensor new Bosch engine cranks at 177-180 rpm scanner reads...

sag2 thank you for "this should help" YES. It does. Question about scoping waveforms was not on lab scope while cranking. It meant to be on scan tool live data plugged in to DTC connector while cranking. That was intended question.

sag2, thank you. Used PVC 1 1/2" schedule 40 to keep tappets where they belong. Nice tip. And made good sense. got another question now 04.5 cam/gear back together. All new gears, new oil pump. Repair originally started on truck that died on freeway 200-miles from home. Quit when shop was at...