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Waaay up route 20...

Conditions for Engaging the Fast Idle System When all of the following conditions are present the idle speed will increase to the selected value and the FAST IDLE lamp will illuminate. The engine is running The transmission is in Park (P) or Neutral (N) Vehicle speed is not detected The FAST...

Where u at?

There may be some condition not met for it to enable/allow fast idle, like throttle position not low enough, or neutral or some such. Not specifically familiar with the specific requirements for fast idle, but it may be something like this causing your issue…

No, i think that J version is good info to have available. There may be some other differences that we might not know about until we actually try to reference something specific.

Yep, its not listed in the equipment reference lists in either of those documents, but R13 and its P250 connector is shown in the drawings in both those .PDFs on page 20… That is one thing I don’t like about these A1 drawings, the equipment ref doesn’t list the connector locations either like...

Looking over the first part of your new .PDF, Revision J Vehicle S/N18549 & below, the only thing I am seeing is it appears to have kept the A0 charging system, Alt and PPD, no LBCD and no remote or manual disconnects. This agrees with my experience helping a few with early A1 power issues...

The 18550-99999 .PDF already here on SS? R13/P250 is in there, its on page 20…

No, Plasma is the answer…

Actually the bottom half of the pages in that document you found has the same info as the A1 diagram already posted in the TM section, but the first half appears to contain the diagrams from the earlier version of the A1 truck, that I started referring to as the A0.5. Basically an A0 with a 3126...

OMG, and I just took mine off to fix the seal... It took about 20 minutes with a electric ratchet and an allen socket... Is it friday yet:(

Yea that looks like a 290HP cat 3116. now I am a tech guy, been working radio and network comms for 40 years now, but I am an old tech guy, And I love old mechanical diesels. The problem is, is that engine tech has surely moved on and unless you understand how to work on the mechanicals, you...

I don't know that I would try and "pry" a handle assembly off, that would surely damage/distort the door skin which would need to get fixed to replace the handle assembly. I would probably opt to cut thru it(door handle) with a die grinder or Dremel tool cutoff wheel(staying inside the...

Yep, that grey thing is a data bus termination resistor… R13? have you looked at this early A1 diagram? https://www.steelsoldiers.com/threads/fmtva1-electrical-schematics.158229/

Probably the most prevalent issue with these trucks, leaking fuel lines sucking air. Unfortunately the unit injector scheme engines are very tolerant of it, and the leakage has to get pretty bad to cause actual running issues. It will cause hard starting and starter/electrical system wear, and...

;)

836 with the type82 connector should be good to 28”HG…

Which specific model push-lock did you use? The issue with the cat fuel supply lines is that they are ALWAYS under vacuum. Not all push-lock fittings have high vac ratings, their spec info shows several as low as 10KPa, which is less than 3” of Mercury… crimp fittings are typically a LOT higher…

Well unless oil is gushing around a cracked injector or failed seal:)

the earlier HEUI had separate lines, and they were a weak link. Anything long the path though that is exposed to the oil, like all the injectors and their seals could also cause issue… just exploring possibilities that would effect HEUI pressure… I wonder what his pressure looks like if he...