Okay so before I get into the problems that i am having, a little background... So I originally bought my car a 1994 5 speed V6 and boosted that with a Vortech Supercharger. When I kept going through head gaskets i decided that it was time for a change (also had some money available at the time). I searched craigslist and found a guy with the motor out of a 89 Mustang GT with a cam, some forged pistons and some other stuff done to it. I talked to the guy and he said he also had a harness and ecu to go with the motor that he'd throw in. So i went and got the motor, tore it apart made sure everything looked good, threw a set of ARP head studs in it and slapped the motor together and started looking at the wiring. Turns out the guy didn't give me the EFI harness for the car which was no big deal i figured id just order one on ebay or something but ended up finding a harness out of a 95 GT locally that came with the computer, harness from the computer onwards including a CCRM. Since i had the motor of a 89 and the harness of a 95 i had to make a harness to go from the TFI that is located on the 89 distributor to the connector where the TFI plugs into on the 95 harness near the passenger side inner fender. So i finally got the motor in the car and to start off I didn't have any spark. Fixed that with a new TFI module but now i run into the problem of only getting spark with the spout connector out. I ran through the checklist that i found on a few forums and everything seemed to test good so i assumed that it must be a grounding issue somewhere. I pulled the fuze box up and soldered the wires for the computer ground to eliminate any grounding issues there. I also put new connectors where the battery ground goes to the radiator surround to eliminate any issues there. Still i have the same problem. I have great spark on all cylinders with the spout out but nothing with it in. Now the other thing that seems to be getting me is that when i turn the key on the fuel pump runs constantly. It doesn't prime for 2-5seconds like it is supposed to and the car will not start. It seems like the car is not wanting to fire the injectors because of the fact that the spout is not in. Now i went through and replaced the CCRM thinking that that would be the primary cause of that but it made zero difference. After this i went out and picked up a ford scan tool that plugs into the EEC-IV plug. After running the codes i came back with a few that i new i would have sine i was only trying to test start the motor at this point. I ended up with codes 118 for the coolant temperature sensor not being hooked up, 122 for the TPS being broken (have one ordered), 637 for Transmission Oil Temperature Circuit above Maximum Voltage (this one seems strange to me), 654 for the transmission not being in park during KOEO test. This threw up a major red flag for me. Now im sure that the guy i bought the 95 harness and ecu from told me that it came out of a five speed. My car is also a five speed so im not sure whats happening here. This is again another area i need help with. Im sure i heard before that you could use a auto computer with a manual car if you bypassed some sensor so does any one know how to do that?. I believe that this could be causing the problem with the car not wanting to fire the injectors. I also get a code for Fuel Pump Relay Primary Circuit Fault which i attribute to the fuel pump running constantly. From what i have read everywhere it seems like the fuel pump is solely run by the CCRM which is why i changed this out before i did any more troubleshooting. Is there a relay somewhere that the car may not have had when it was a v6 that it now needs for the v8? If not where should the fuel pump relay be? Ive messed with this for over a week now trying to figure out these problems and i figured it was time to finally ask to see if any thing stood out to anyone. All of the problems that i am having combined seem to me like a bad computer. Does this sound right? I can have my local auto parts guy get one in but its going to be a few days before he can get it here. Im also kind of getting sick of throwing money at a problem attempting to fix it but it seems like the logical next step.
Any help is appreciated. Would love to have this thing out driving soon to see how she feels with the boosted V8 in it.
Thanks for the help,
Christian
Any help is appreciated. Would love to have this thing out driving soon to see how she feels with the boosted V8 in it.
Thanks for the help,
Christian