1990 Ford Mustang Repair Question
Mileage: 12,400 miles.
Car cranks but won't start
Asked by ashman_0Answer
Check if you're getting an injection pulses from the injectors and also if you're getting spark? Also refer to this link for more information: http://www.2carpros.com/articles/car-cranks-but-wont-start
I checked the entire fuel system all appears good. Disconnected the return at the tank cycled and got a return. Coil, plugs, wires,and according to your post the icm and the pip sensor and the eec relay. Exhaust pressure is strong enough I can't hold my hands over the tailpipes when cranking over. Ignition is firing to every plug.
Nope it will not start with starting fluid either.
What about spark do you have it-if so is it a snapping blue spark?
Plugs were wiped dry, now are wet and I am getting plenty of snapping blue spark.
I went through every step, how can you tell if the ecu has gone? I am good on the noid light test and and it says the same permanent hot to the fuel injectors is the same circuit that powers the eec relay and ecu correct? I just don't understand it the car would at least start with the old weak fuel pump and filter. That is all thats been changed. Would a new pump make the fuel pressure regulater go bad? I pulled the vacuum hose off of it there was no fuel in that. I would think there would be probs with the return if it were bad. Blue spark will jump more then 3/8 it has an accel high output coil only. I left the ignition as normal checked timing its good, ran a timing light on every plug wire. I'm at my ends, I don't know what it is. It doesn't hit a lick at all just cranks and cranks.
Additionally I ran through this checklist as well. http://www.stangnet.com/mustang-forums/threads/running-fine-one-minute-and-wouldnt-start-the-next.859313/
Check compression and the valve timing if its within specs