diabolical1

iTrader: (3)

as Satch explained, you're not testing the pump with this diagnostic. you're testing the AFM's ability to signal the ECU to keep the pump on.

Cynxe

And what happens if hard wiring the fuel pump isnt the problem?

Cynxe

So how do i hotwire the fuel pump? where do i run the wires?

satch

iTrader: (1)

If you are looking to check the operation of the AFM as it affects the supply of fuel to the engine, which you should, then you either jumper the fuel check connector or jumper the bottom two wires of the circuit opening relay.

Cynxe

just tried jumping it, still nothing, car still dies as soon as i start it

satch

iTrader: (1)

A car which dies immediately after starting, which can at times continue to run by playing w/the throttle, sounds much like a vacuum leak.

Cynxe

but i fixed them all, theres none left. i have tried everything. idk what else to do.

satch

iTrader: (1)

I believe you would have to check for vacuum leaks either by pressure testing the system or via a smoke test otherwise you won't really know. Secondly, when the car dies, test for voltage on the Blue wire in the circuit opening relay. Do not touch the ignition key after it dies thus leaving it in the on position. And have the jumper in place before starting the car. What you are looking for is power or a lack of power to the fuel pump.

Also, make sure the flapper to the AFM is not stuck closed.

Cynxe

i jumped a long wire directly to the fuel pump. Theres gauranteed no lack of power, flapper does not stay close

satch

iTrader: (1)

Then you need to verify whether there is proper pressure in the fuel system. And if that is good then you need to make sure the injectors (primaries are used to start the car) are in working order.

Cynxe

I already checked primaries and secondaries. They work perfect. I have sufficient fuel pressure. I have done about everything. There was an engine fire but everything is rewired accordingly. With new wire.

FührerTüner

iTrader: (5)

My old 86 na was doing this a long time ago. It was the LIM gasket causing a huge vacuum leak. If I were you, I'd start by taking all of the intake manifolds off and replacing all of the gaskets and vacuum lines.

diabolical1

iTrader: (3)

actually, in the same vein of the above post, check the lower manifold itself. I've seen a few times where the lower outer bolts can snap off the edges of the manifold, thus creating a vacuum leak. so give a look just in case.

Cynxe

I will look at this and get back to you.