86 rx7 wont idle
There is a fuel switch inside the AFM. Once the car starts the fuel switch controls the fuel pump. If the switch was not working properly it would create a situation where the car has no problem starting but once the car starts the engine dies immediately. If this mirrors your problem then it is an issue which you need to check.
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.
just tried jumping it, still nothing, car still dies as soon as i start it
Also, make sure the flapper to the AFM is not stuck closed.
Last edited by satch; Jul 27, 2015 at 02:29 PM.
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.
Also, make sure the flapper to the AFM is not stuck closed.
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.
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.
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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.
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.
I will look at this and get back to you.
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