1997 Chevy Express crank no start

ella.kerr3_182534
Wed, 05 Oct 2022 15:44:48 +0000
Maintenance/Repairs

Hello so im dealing with a crank no start issue that is really confusing me and I would love some input. The issue started about a week ago. It first started off as intermittent. My van was running exactly the same as always and then one morning it was just cranking and cranking and wouldnt turn over. It took me about a day to get it to start the first time, and then it ran great for a couple days until the same thing happened again. This repeated a few times and now im permanently broken down.
Heres what ive learned about the condition so far:
I have spark. If fires right up with starter fluid but stops as soon as the spray is stopped.
I have fuel pressure. Tested it at my schrader valve and i have over 50 psi. It holds well too. Sure its 5-10 psi below specs but when it runs, it runs totally fine. No symptoms of low fuel pressure.
At first i thought it could be an issue with an anititheft system but i bought the van used and it has always turned over without a key just by twisting the lip of the ignition cylinder. So this seems unlikely.
At this point im pretty sure its that my fuel injectors arent getting pulse for some reason. The part that confuses me is that whenever ive gotten it to start it runs great. It has started up usually about 4 times in a row with driving in between before the issue comes back. Id think if it was a sensor issue i would have some kind of symptoms. I also have no error codes present.
Does anyone know how to test if its my ecm?
Any advice would be very appreciated!! Im in a really tough spot right now and i have to fix this.

92 posts - 11 participants