SublimeLizard80

Fair enough. Not by the car now but tried starter fluid yesterday and it didn't do anything. All the tests at the ECU checked out except the voltage test for the air regulator on pin 21 so I know I probably need to do some harness tracing. Do you know of any tests for the icm? The coil seems fine but I'll probably just buy a new coil since they're not to expensive just to make sure it's not that.

Sparks not particularly strong, coil seems to test well, not entirely sure how to check the module. Just finished doing test at the ECU connection via the fsm and about to check fuel. Relay due to a bad air regulator read. Like I said in post I know the fuel pressure is due to check valve on the fuel pump side so I'm not worried about fpr failure

Hello all I have a 1983 280zx na that sat for a while and in February I went to get it going again. It started but didn't drive for crap went through all the diag in the bible and the fsm concluded the fuel pump wasn't up to task, replaced it and all was well. Due to unfortunate circumstances I had to leave it until this Monday and it started right up then immediately started acting up if I rev it to like 3-4k I can get it kinda steady but when I stop it slowly peteres out and wont start up again, then it did it again yesterday same exact thing. Sparks there gets fuel to pressure. The only thing I can find wrong diag wise is on a pressure leak down test, with the pump running it stays at 40 with the car off (can't see pressure gauge from in the car during the 60 seconds of running I get as im by myself) and as soon as pump stops it's drops to 0 within 2-3 seconds I know it's leaking back through the pump and not anything on the fuel rail. Since I know it's gets to correct pressure I can't understand why it won't start back up after the initial crank idk what I'm missing and it's driving me crazy. If the check valve on the pump being bad can actually cause this issue can someone please explain why. This is my first time ever going on a forum of any kind so if I didn't follow a protocol of sorts or I was to long winded I apologize, any help would be greatly appreciated please and thank you