Help! No start, but will try with starting fluid

[Sunlitgoldpony]

1991 explorer 4.0l e/b edition. 4x4. With starting fluid it will try to start. Fuel pump has been replaced. Fuel pressure is 40 psi when key on and cranking. Voltage at an injector is 2.7 volts with key on, dropping to 2.4 and slowly counting down with key in run pos. and cranking. I barowed a snap-on diagnotic tool from my brother to check the codes. after getting it setup. it was doing a key on- engine off test. it said i had to wait 60 second will it did its check. and it never finished. on the phone , he said it would be activing relays and solenoids. and i should hear some clicking and noises. I did not hear anything like that.
The vehicle has a water leak in the windshield on the right side above the eec which is mounted on the kick panel on right. the wires in the area of the eec going to the back of vehicle were laying in water that was in the valley under the threshold. ( i removed the plug to let the water out and let dry) the ground wire by the eec is in not corroded. i did remove the main wire harness on the eec and it had a hint of moister on the red rubber insulator between the two sides of the conection.
the cel does not come on at all. i checked the bulb and even put in a different one and checked it for continuity...ok..till no light.
I have checked all fuses inside and at power distribution block under hood. which is on the right fender well.
At this point i think it's a problem with the eec or it's relay or wires. will the relay be located at the end of a loose wire by the blower motor.(right rear corner of the engine compartment). what color is the plastic plug,(black, brown ,green). I think i need to check if the relay is send power to the eec. or is the eec receiving the power. if it is, i assume the eec is bad and thats why i have no proper voltage to open the injector and lett gas in.....

post thought....does inertia switch, although i have fuel pressure, cut power to the injectors?????thx

also there are 3 relays by the blower motor. what should the reading (ohms) be on the #1 to #2 terminals on a good relay. I have 2 different reading and one with no reading. one looks burned or corroded

 

[MrShorty]

On my '92, the EEC relay (along with the fuel pump relay) are housed underneath the fuses in the power distribution box under the hood. The "box" containing the fuses slides up and out to reveal the relays. I would agree that the first thing to check in this case is to see if the EEC relay is closing and the PCM is getting power.

The inertia switch has nothing to with the wiring to the injectors. The injectors are supposed to get a constant +12 V from the EEC relay, and then the PCM acts as a ground side switch. Again, your checks at the injectors suggest a problem with the main EEC-IV power supply circuit.

I would suggest getting a wiring diagram (the ones in Chiltons and the ones in the vehicle repair guides at autozone.com are adequate for the fuel pump, PCM power, and fuel injector circuits) so you can get an idea of how these are supposed to be wired in.

 

[Sunlitgoldpony]

Thx mrshorty...after doing a search it sound like this is a somewhat common problem. I will check that relay setup under the power block. please stay tuned

i just looked ...the power dist .block does not have relays underneath it. As stated before the are 3 in the area by the blower motor....black, brown and green plastic plugs. have not seen any other under the hood

 

[MrShorty]

Green is usually fuel pump on these. I can't remember if black or brown is EEC relay; I usually look at the wires going into the connector then compare to a wiring diagram and see which match up. If nothing matches up, I disconnect the relay and the fuse and use an ohmmeter to see which wire connects the fuse and the relay.

 

[Tbars4]

...This may be of some help for future reference...
http://www.explorerforum.com/forums/showthread.php?t=208097

 

[Sunlitgoldpony]

Crisis over..... i purchased new eec relay (brown plug) which was probable the main problem. And a fuel relay (green plug), to make sure they were in go working shape. I had taken of the top of one relay off and it was corroded , big time. The relays are different according to the parts lookup. I did check the original 3 relays for operation. one was bad (the corroded one) the other 2 "clicked" But, I think I will tose them all. they are probable all corroded a little. Atleast the terminals and plug-in are not in the cleanest shape. it fired right up after i installed them.....thx to all for the help