02/03 explorer tach problems

I'm haviong problem on a clifford 2.1 installed on a 2002 ford explorer.  The vehicle dies in 3-5 min. the shutdown diagnostic is over rev. AS suggested in earlier posts I swithched to the pnk/wht at the coil pack. I also tried learning the tach at higher rpms 1500, 2000, 2500. still does it. also in drive(low rpm). still does it. i also tried moving the tach threshold jumper and the above higher /low rpm's. still shuts off I dont really want to use a injector wire as i heard if it shorts it will keep the injector open causing the engine to flood/was the gas and cause engine failure. I would like to have the tach proterction in case of real over rev, instead of just using voltage sense. any input would be appreciated thanks

any other ideas I really dont want to tap a injector wire, dei says many ot the coil wires work,the pnk/wht seems to be the favorite. There has got to be someone who has made this work . this unit is a good quality unit. there has got to be a trick
???  Thanks to everyone

8 cyl.   ???   Grey @ the PCM, pass side under hood.

Other......blue/green @ coil pack....

Ive done both....they work fine on an astroflex

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I had to fix one of these cars that had the same problem. It would run for a couple minutes and then shut down. The installer had the wire at the coil pack. I switch it to an injector and it fixed the problem. In my experience, on Ford vehicles, i use an injector almost all the time.

6 cyl, clifford 2.1, is this unit a piece of junk now. A couple of years ago when i was installing they were pretty good

i too am against going to an injector. no real reason, jsut have bad dreams afterwards. there was a six month period at the ford dealer i was at where i had to tachless all of the explorers. it was wierd, same problem as above. 6 months later tachless worked fin. there was no big change in temperature or anything. the tach i was using was a pink white and a green white depending on engine. this wire is no longer there on the newer explorers.

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Go to tach wire it works.

stevent, what works???

How's your ground? I have come across a couple Fords that the cab was a good 50-60 ohms away from the battery ground. Never know. Also, head for an injector... more stable signal.

Gus


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Wherever I go, that is where I end up......

** i meant injector wire (2 posts up)

Injector wire works fine, thanks for all the help

you can hook the tach wire to the blue wire that goes to the crank sensor

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doug.b