No fuel from injectors

Tiny
CHRIS HENSON
  • MEMBER
  • 1995 FORD TAURUS
  • 3.0L
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 100,000 MILES
My car is getting spark, but does not seem to be getting a signal to trigger the fuel injectors. Where does the signal for the fuel injectors come from?
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Monday, May 1st, 2017 AT 4:57 PM

3 Replies

Tiny
CARADIODOC
  • EXPERT
Ignition coils and injectors are fired by the engine computer when it receives trigger pulses from the crankshaft position sensor and camshaft position sensor. Have you checked for fuel pressure?
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Monday, May 1st, 2017 AT 6:35 PM
Tiny
CHRIS HENSON
  • MEMBER
I have checked and have fuel pressure at the rail. I replace the fuel filter too in case there was a clog limiting flow. Does a 3.0 with distributor still have a crankshaft position sensor? I have been told that it does by some, and that it does not because it has a distributor by others.
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Monday, May 1st, 2017 AT 6:39 PM
Tiny
CARADIODOC
  • EXPERT
Did you actually measure the fuel pressure, or just look for a squirt from the test port? Have you tried running the engine on starting fluid?

The first step is to check for twelve volts on the red wire at any injector, with the ignition switch in the "run" position. If that is missing, check the 10-amp "ignition coil" fuse in the under-hood fuse box.

There are two versions of the 3.0L engine, but both versions actually use three sensors. Ford always does things differently than every other manufacturer. You have a crankshaft position sensor, a camshaft position sensor, and a third position sensor inside the distributor. The first two are quite different between the single-cam engine and the dual cam engine.

There is even two versions of distributor. One has the ignition module mounted on the side of it, and one does not. There is no reference made to which sensor triggers the computer to fire the injectors. My source just says, the sensors.

I really disapprove of throwing random parts at a problem. The place to start is by reading and recording any diagnostic fault codes, but that can only be done on Chrysler and GM products without a code reader. You may be able to borrow a reader from an auto parts store that rents or borrows tools. The next step, if there is no code referencing a failed sensor circuit, is to use a scanner to view live data and see what the engine computer is seeing for those sensor signals.
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Monday, May 1st, 2017 AT 8:46 PM

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