My engine, it wont re-start

GEME5

MEMBER
2003 FORD TAURUS
3.0L
6 CYL
FWD
AUTOMATIC
170,000 MILES

I got a call from our son the other day, "my car was sputtering and the idle was going up and down and then it died, now it wont re start". So I went and looked it over, trunk fuel switch not set, check, all fuses good, check. No spark on any of the 3 yellow wires at coil while turning over, hmmm, must be crank sensor, nope. Cam sensor changed, nope even put a new coil pack on, still nothing. The cem is on when the ignition is on but will go off while cranking telling me the computer is picking up the crank and cam sensors. The initial scan result was "no egr activity" forgot number but it was like p0401, but dont quote me on that. Any body have any ideas?Thanks Gunner

1 Reply

KASEKENNY

MECHANIC
18,907 POSTS

Sounds like you have a PCM issue.

Basically this system uses the cam and crank sensor to determine engine position and timing of the coil.

So if you are not getting any signal on any of the ignition coil trigger wires then you have a PCM or signal issue from the crank sensor.

If you have replaced these sensors and have no change then I would suspect it is the PCM.

However, I would suggest using a lab scope and making sure you have a correct crank signal but this is not common for people to have.

Shot of this, I would replace the PCM if you have correct voltage at the PCM. Here is a guide that will help with this:

https://www.2carpros.com/articles/how-to-check-wiring

Below you will find the wiring diagram and info on this system which will help figure this out.

Also, the EGR code is not going to cause this to not have spark so we need to address that separately.

Let us know if you have questions and what you find.

Thanks

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