Originally Posted by npn74
Well, here we are 9 months later and now I can make this problem happen every time the engine is warm. Hoping someone can help me or this might get sold for scrap. Here is the current situation..
If I run the car for 15 minutes or more then let it sit for 5-10 minutes it will not start..every time. Over the past couple years the problem was very intermitant..maybe once every couple months. I have replaced the distributor (complete- coil and other components are inside of it) I have replaced the fuel filter, EFI relay and circuit open relay. I thought it must be a fuel problem. Today I waited for it to not start then I pulled the air intake off and sprayed starting fluid down the throttle body. It started right up and continued to idle just fine. I ran the test again later..no start, spray ether..start and run fine.
How can the engine not get fuel, but then run just fine with a spurt of spray. When it fires on the ether is that somehow restarting the fuel pump to give me fuel?? Any ideas at all would be greatly appreciated!!
when engine is hot ecm doesn't send a 2 second signal to the fuel pump to prime the system, because it uses the ECT reading ECT said to ECM im hot no need for a shot of fuel ,colder ECT readings more fuel needed to start , one other way to test this is cycle the ing key 3-4 times before actually crank the engine this will allow the fuel system to prime.
do this test
, whit a hose clamp tool ,install the tool on the return fuel hose after the fuel pressure regulator, if engine start whit this on it you have a small leak on the fuel pressure regulator this will cause fuel to return back to the tank leaving the fuel injector rail empty it will produce a no start condition , second test
is problem still present after test one
will need a fuel pressure gauge mount on the inlet side of the fuel rail ,perform a pressure test (with engine off cycle the key few times )save the reading install clamp just like on test one now let the gauge on and watch how much the pressure reading drops (no more then 10psi with in 10 minutes) if it does drop (bad check valve in fuel pump ) replace fuel pump .
i know at lot of work