Crank no start issue, has spark and fuel?

Hi, I'm very grateful for this site and thank you in advance.

Here is my issue: going to work stopped at a traffic light, the van shut off tried restarting and van sounded like it was off timing. Towed it home.

Will explain a few things why so many parts were changed.

Left van sitting outside one year and two months came back February 2022 and cranked no start. After diagnosing changed MAF, and ECM (flashmasters).

Van ran really nice. Mid-summer 2022 changed rotted out catalytic converter with four new O2 ACDelco sensors.

I went on a summer trip and the van shut off, no spark, I had no tools, so I threw parts at it changed coil and distributor but that wasn't the issue. It ended up being the CPS.

Now to where I am currently, that van shut off at a traffic light. I changed out the timing chain thinking it stretched or jumped, (it didn't the dots were aligned perfectly) because when I changed the distributor, I didn't use a scanner to get it to sit at 0 degrees -+2. The engine would slightly ping when it shifted to overdrive. After I buttoned everything up it still did not start.

I re-stabbed the distributor using the manual technique by putting cylinder number 1 on compression TDC then manually moving the damper mark to notch on timing cover. Still no start.


Check fuel pressure key open says 60 PSI and holds.

Has spark.

Went ahead and used a Noid light to test pulse at fuel injectors and I got pulse so I changed the fuel injectors (had converted to MFI in 2011) I installed a new MFI, new upper plenum with gaskets. Still no start.

Changed fuel filter no start.

Changed spark plug wires no start.

Does not start with starting fluid.

The strange thing is when it cranks it cranks like it has good compression and the engine before it shut off was very strong, no oil consumption whatsoever.

Strange thing 2: other day I unplugged the computer overnight and when I plugged it in the following day it started a few times ran a little rough since it burned off all the excess fuel but idle so after that. It won't start back up. I did borrow an older Tech 2 Genysis scanner but I am limited to what I can do since I never used one. I dint see any codes.

Lastly since all these sensors are under warranty I replaced the CPS and distributor still no start. I am waiting for an ECM since it still has a warranty.

Can it be the fuel pressure? I can't find what fuel pressure the MFI spider upgrade should be at, I've read conflicting specs on forums that call for 61-66 PSI, but someone had said that's for stock poppet valve spider system CFI. MFI needs less PSI to operate.

I do have a new Delphi pump in case I can't start it with the “new ECM”

Any input would be appreciated I need the van to go back to work it'sha been three weeks and I am stumped.

I attached a video; you can hear the engine almost starts but falls flat.