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That's one tiny turbo

The obd1s would get stuck and be hard to get unstuck once you hit -2.02 IIRC. The obd2s don't seem to have that issue.

Try unlocking the TC going up the hills or even dropping to 3rd

Check air filter

My 96 went to 305k before the crank broke. It had massive blowby, I'm assuming from getting too hot. Never did anything with the dampner, My 99 is at 285k and blowby is still OK, noticing lower oil pressure though. IMO getting hot is the main culprit with these engines

Check with glagulator about the harness

Any ds4 engine I've worked on didn't have any marks

must be an obd2 system. PCM tells it to run for a bit on key on. no oil pressure present tells it to turn off

The zddp is for flat tappet cams not roller

You need to get a scanner on there that can read the data live to see what's being commanded vs what's actually going on. Have you checked the harness plug at the trans to see if it's oil contaminated?

So when you jump to the high rpm it's because it's going into neutral?

That's not just the TCC unlocking that's dropping at least one gear maybe two. Makes me wonder if it's bouncing in and out of limp mode

Are your engine temps coming from the dash gauge or from the scanner?

Seems like I had to run a wire from the battery to keep it on when I was checking my cranking rpm

No for some reason it copied the thread instead of the post. Read further on

https://www.thetruckstop.us/forum/threads/cdr-valve-replacement.41076/page-2#post-465437

Yes needs to be an air tight connection.

I can't hear it now. It must be good. Lol

It can come and go. It can be loud enough to sound like a rod about to exit the block

5 seconds should indicate that it's taking that long to refill everything. If it only lost pressure it should build pressure immediately