Mechanics

ENGINE CRANKS BUT WON'T START

1995 Ford Taurus • 163,000 miles

Won't start. Turn on ignition, fuel pump runs and won't stop, fan runs, ODBC won't display codes (light on solid). So far replaced fuel pump (twice) Fuel pressure regulator, CCRM. Ran a new ground wire for CCRM. Engine occasionally starts but only if the following happens: turn key on (But not crank)Fan does not run, Fuel pump runs then stops, Then it will start. It runs about 2 min then dies. As soon as it dies the fan turns on.(This only happened 3 times in 2 days!)
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RFogal
July 14, 2012.




Engine cranks and no start: Go to this walk thru link: http://www.2carpros.com/articles/car-cranks-but-wont-start, then let me know-


Tiny
Rasmataz
Jul 14, 2012.
There is plenty of spark. Obviously there is compression. There is plenty of fuel pressure. I cannot remember the reading but it was sufficient. The problem is electrical. The fan is not supposed to run when the ignition switch is turned on. The fuel pump is not supposed to keep running. When these things do not happen the engine runs.


Tiny
RFogal
Jul 14, 2012.
What liter engine?


Tiny
Rasmataz
Jul 14, 2012.
3.0 V6 Single Cam
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Tiny
RFogal
Jul 15, 2012.
Check and test the coolant temperature sensor, check the CCRM wiring back to the computer and computer itself


Tiny
Rasmataz
Jul 15, 2012.
OK. Will test tomorrow and get back to you. Thanks.


Tiny
RFogal
Jul 15, 2012.
Sorry, I just remembered, if you pull the 50Amp fuse for the fan, the fuel pump still runs constantly and the engine does not start.


Tiny
RFogal
Jul 15, 2012.
Check out the fan circuit as directed. That was a waste of time. /Having a wiring diagram without knowing the sequence of events is practically useless. Anyway, the problem has been solved. Swapped the PCM/ECU/Brain with a 1991 Taurus that I had and Viola! It worked! Admittedly the 1991 is not a perfect replacement for the 1995, the car runs a little weird. But now I can order the proper one with confidence. Hope this post helps someone. This drove me nuts!


Tiny
RFogal
Jul 15, 2012.
Thanks for letting us know, and sorry we couldn't help you better with the diagnostic steps we provided.


Rivermikerat
Jul 20, 2012.
I gave you the sequences: and computer itself, If the fuse and CCRM checks out okay-last place is the computer-Viola it is-


Tiny
Rasmataz
Jul 20, 2012.

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