D15, D16, D17 and Mini-Me swaps
By xm3x
#185417 ok i picked up a 91 ef. car ran for about a month then one day nothing just cranking. checked fuel filter for pressure and plugs for spark and its all there and checked timing.. what am i missing? someone said crank sensor can go bad and not tell the ecu to "fire" injectors. i used to get a cel after about 10 min of driving.if it helps thanks
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By Classiccarsrule85
#185421 if you havent reset the ecu the check eng code should still be there check that out....more than likely you have the dpfi motor this is pretty much a glorified carb setup...unless it has the mpfi swap on it so possibly if its the mpfi set-up then your looking at a possibly bad resistor box if still obd0 or a bad injector setup......

now it could be your crank position sensor, next it may be your injectors,,,,dpfi=2 mpfi=4 check the resistance etc....

next id look into your compression being that its an 91 it may not be that great.....so you may not have enough to start....
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By 99cx
#185424 give it a bump start. see what happens. 9 times out of 10 it will run, then you can narrow down the possibilities.
By xm3x
#185605 bump start like with starting fluid? thats a good idea ill give it a try. it has four injectors. what should they read when i check them and how exactly do i check with volt meter?
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By Ajax1989
#185609 motors need 3 things to start

*fuel
*spark
and compression

but it could be alot of things
the starter could be bad or there is a bad fues somewhere
but if everthing is good

i would do a compression check and go from there
but who knows it could be someting simple
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By 99cx
#185671 lol i mean bump start as in give it a push had drop the clutch to start the car from rolling.
see if that gets it running. if it does is ignition problem.
if not then air or fuel.