1994 Taurus SHO

[MyTaurus8AChevy]

Originally Posted by BOHater94

Alright if i changed the brain and the car I took it out of didn't have the alarm or the PATS for that matter could that be where the problem is?

It could be the brain, but not for the reason you stated. Ford started using PATS early in 95. Your car is a 94. Depending on when your car was manufactured it's 'technically' possible that you could have PATS, but the odds are that you don't. We're not going to rule it out, we're just not going to focus on it having PATS at this time. The chances are VERY slim that it's your problem at this time. If your car was one or two years newer, then we'd be looking at PATS a little closer

The easiest way to trace something like this down is to start at the output and work backward. We know it's not the sparkplugs, so next in line is the wires. We know it's not the wires, so the next in line is the distributor, ETC. ETC. We keep doing this until we get to the key

[BOHater94]

Starting at the plugs and goin backward, Plugs(new) Wires(new) Coil(new) Cam switch taken of a "running" vehicle as well as the brain and the crank switch...alright with the PATS..."outta" mind, Could it be the brain from another car NOT compatable with this vehicle? The Donor car is IDENTICAL...From the motor to the color....year, but....the donor was in a "bumper thumper" the bags were deployed but nothing was crushed in the engine bay but the radiator. Due to the bags being deplyed would that have an affect on the brain

[MyTaurus8AChevy]

Originally Posted by BOHater94

Could it be the brain from another car NOT compatable with this vehicle?

Yes.

Due to the bags being deplyed would that have an affect on the brain

Not as far as starting goes. Did the car it came out of still run? Depending on where it was mounted it could have a hairline crack in the circuit board, but that's fairly unlikely.

[MyTaurus8AChevy]

OK we've got to get this car started now because I have money invested in it (I photo copied some things for you)

I'm sending you the engine wiring diagram which should help you to trace down the problem

[shorod]

Did the PCM part number from the donor car match the part number that was in your car? There should be a 4 digit bold part number on it, something like D4U1 (I don't recall the two versions used for the automatic SHO). See the following eBay auction for the number location:
http://cgi.ebay.com/ebaymotors/95-Fo...spagenameZWDVW

Did you have the donor PCM in your car before the no-start condition started occurring (ie: did your car ever run with the donor PCM)? If not, since the conditions haven't changed, why not put the original PCM back in?

Also, your SHO should have the Constant Control Relay Module (CCRM) which contains the PCM relay, fuel pump relay, A/C relays, and cooling fan relays. Inspect the ground for the CCRM closely and make sure they are clean and good. Backprobe the CCRM connector to make sure the PCM relay is providing battery voltage to the PCM.

Have you tried jumpering the EEC diagnostic connector to see if the PCM will flash any codes? If you jumper the connectors, turn the key to run, and you get no flashes, the PCM is either not getting power or is faulty. That would certainly explain the no-spark condition since the signal to fire the coil primaries is provided by the PCM. That signal would be another good one to check.

When you try to start the car, pay attention to the Check Engine Light. Does it remain illuminated while the engine is cranking?

-Rod