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The Bio can create issues with the DS4 PUMPS You are running 99% bio ???

I agree 100% If you get the timing back to the 3.5 and it still does not want to quit giving the TDCO at -2.02 or, then we need to suspect other items. How many miles on the IP ???? Missy

Your welcome :hello:

The way we have been going is doing what it's supposed to, THE TIMING IS ADVANCING We need to get the timing back to a number closer to 3 to 3.5 and see wasssssup. Missy

Reading through the manual and the various posts. Try adjusting the IP back towards the pass side a bit beyond your scribe mark. Warm it up good, then do the time set. You want to see numbers in the 3.5 range and here your TDCO should come into a more reasonable range If you get the TDCO...

My one concern is why the TDCO all of a sudden changed to where the thing started complaining ???? The value stored does not just change by itself.

As I mentioned, if you keep getting the same -2.02 it may be the crank position sensor that's doing weird crap. There is the possibility of an issue with the IP as well

We can be nice to the admin and maybe it will be so. With the clean "widdle yellow motor" this was a great time to get some high res pics There seems to pop up every so often, the request for help on these issues, and I had the iphone right handy, so why not. Missy

If more fooling with things still yields a high minus number (-2.02 example) I would be suspect of the crank sensor doing weird stuff. The fact that the issue just popped up is always a wonder wtf See what shakes. Missy

That would be it. Try to get the TDC OFFSET down to about -1.25 to -1.5 or somewhere close. Even if you hit it at -1.00 your good. These can be a PITA to get spot on.

No worries I am not going out in that heat, at least no for very long. Humidity in the summer is generally in the 40 range, but we can on occasion get into the 60+ % This morning the air is heavy at 76% Winter is a different story 70++++ % Nothing like you get in the midwest When it gets to...

Knowing what the error is is a good thing, but since you don't have the advanced GMTDCSCAN doing what I described can get you back to a point that the ECM can srt the timing to what it wants to. Ideally you should do all the diagnostics and see where it is and then go forward accordingly...

Today the starter went back on, as did the turbo and a handful of other tid bits. Was near 100F outside and this old girls Zippppp just fell on it's butt. Getting closer. I want to trim the inner fender on the LH side up near the front to allow easy access to the radiator drain cock. The...

The HO water pump ?? are these made for the V belt drive systems ??? The normal HO pumps are for the serp drives and turn backwards as compared to the V belt systems

The TDC offset is a finite number in the computer right now, and will not change unless it's told to. The likely reason for the 88 is as I mentioned before, the servo can't reach the desired spot. The vehicle no doubt has had a few pumps on it since it was new, and depending on who installed...

Starter back in this morning and snapped some pix of the wiring and such One pic clearly shows the tail hook bolted to the block and the starter. The wiring is well shown with even the loop clamp that fastens to the top of the frame rail. For those who are new to these buggers, look closely at...

I had a couple of the Olds Cutlass coupes. Great little rig, but the diesels were a maintenance hog The heads cracked if you got them hot, and the gaskets were sketchy as well. The Cutlass I had was fitted with the 260 Cu in diesel

Put a smear of high temp silicone on them and your good to go. Just be real careful with the manifold off, that nothing drops into the intake ports. Good luck Missy

There is the possibility that the TDC OFFSET that was set had taken the servo right near the limits of travel, and a slight bit of wear in the timing chain has occurred, and now the servo can't reach the point it wants too. Advancing the injector pumps physical location about 1/16" as measured...

Well now, here we are with a starter that has quit, or WORSE. Yeah, we have all heard or read of the hapless soul who has had a starter fall off due to some P O or shop leaving the support bracket off of the starter. First off, the starter and related wires on it do not need to be a tough job...