[nox5.0l]

Hi every 1 i need some help on my 1991 lx 2.3 i have no spark i put a new module and crank sensor but still no spark my fuel pump wont go on either butt i rather fix my ignition problem first because fuel is easier is there any main fuses ? anything else i need to check ? i need help fast or my car is gana get towed please help me!!!

[ethangsmith]

I think your 2 problems are connected, and, unfortunately it could be quite a few things. Your EEC relay could be bad, the EEC could be bad, your ignition switch could be bad, you could have a blown fuse or fusible link, or even a harness issue. Determine first whether or not the EEC (computer) is getting power. Try to run codes on it (Haynes or Chilton manuals tell you how with a multimeter or light bulb).

[nox5.0l]

it has to be the EEC ima check that out today any other things that could be wrong will help do you know if theres any main fuses that go to the EEC i have a chiltons manual i hink but its alll ripped up where in the book does it tell you how to run codes ? THANKS

[ethangsmith]

I'm not sure how the 91's are set up, but the EEC gets its power from the EEC relay, which gets it's power from the ignition switch. I think your EEC relay and any fusible links would be in or right around the CCRM module (black box with a load of wires coming out of it. I forget the exact location, but I think it's on the passenger side near the shock tower around the MAF sensor.) CCRM modules are known to fail, computers are not. If you're not getting spark and the fuel pump is not running, then it sounds like the computer is not getting power at all, which would indicate a CCRM/EEC relay problem or a bad fuse or fusible link (I am not sure where they are on a 91 exactly, but be sure to check all the fuses on your fuse panel below the steering column (remove the little trim piece below and the the left of the column to reveal them) and check the fusible links (generally located right around the starter solenoid). If any fusible links are melted, cut it out and solder a new one in. They can be purchased at pretty much any auto parts store. Just be sure to get the proper gauge link again. If I remember correctly, the sections about running the codes are in the emissions sections of either manual. If you have difficulty finding the sections, just google EEC IV tests and I'm sure you'll find testing procedures.

[nox5.0l]

thanks for all the info it is the relay box i jumped the wires and it started but shuts down after a couple of seconds my fuel pump is weak it has low presure where can i find those black boxes >?

[ethangsmith]

Where and what did you jump to get it to run? That could determine where the problem lies.

Your CCRM will look very similar to this one (also a Ford CCRM):

http://www.undrprsr.com/project_imag...2709_550px.jpg

If you jumped the starter solenoid and it started, then it could be the ignition switch.

[nox5.0l]

i jumped a power wire to what i think goes to the computer and another 1 that goes to the ignition and fuel pump i think i dont have a wirring diagram for a 1991 mustang lx 2.3L with dual coils do you know where i can find 1 so i can get her running

[nox5.0l]

its the CCRM can i bi pass the box ?

[ethangsmith]

There is no real way to bypass a CCRM because it is a box full of relays and resistors and diodes and such. I would try and get one from the parts store or a junkyard. As for wiring diagrams, the only place that I know of that would have them is if you got a Ford book off EBay. Haynes manuals have wiring diagrams, but I don't think they are for the coilpack cars, only the 4 spark plug cars.

[ethangsmith]

CCRM part numbers at Advance Auto:

Cardone 7370009

Niehoff RCM18M

[93stanggirl]

im haveing the same problem with my 93 2.3 l some one gave me this link http://www.allfordmustangs.com/forum...rm-pin-out.jpg but what i have found out is the part needed to bypass the black box is no longer made or attainable from ford they would be needed from a 89-90 fmustang as for the no spark issue i too am haveing this issue ill keep you posted