rustyoldfords
Active member
Hello all.
I am torn on what to do with my '91 bronco. I just cooked my third EEC-IV PCM. I replaced parts of the wiring harness after the second thinking that was the problem, but honestly the old harness was cleaner. That's actually why I bought the truck when it had the 351W in it because the wiring was so clean and original. The 300 I put in was equally as clean, and everything was plugged in factory.
I have run a few EEC-IV controlled Fords in the past, so I realize that this is not the norm. This is the first one I've ever had a problem with. It is however making miss my beloved 73-79s. Dang rust belt.
The wiring on the Bronco is very clean, but most of the connectors are corroded. I have cleaned them as best I can, but I am wondering if this could be the problem? I hate to rewire the whole engine control harness just for some corroded connectors. I saw a TSB for corroded connectors, but is this for everything?
This motor is bone stock 1993 by the way. I've had no need for mods yet, and have been enjoying 18MPG in a full size Bronco (when the ECM actually works correctly.) This does not mean that I won't do any in the future, but I have no plans to as of now.
I have been kind of drooling over the MSII diy kit along with the harness and stimulator. At $385 before shipping, it is a bit steep for a stock application I think, but might be worth it for the long haul, as I could always adapt it to pretty much any vehicle.
I'm just not sure I'm ready to give up on the EEC-IV just yet. I can grab a breakout box for it on eBay for under $100. I'm cheap so this is kind of appealing, along with a 4th $35 junkyard special EEC-IV. I will however spend the extra if it will save me a lot of headache.
I'm just not sure. The harness looks so nice, I even checked it for that TSB with the grounded shield rubbing through the wire insulation. TSB had not been done, so I did it, but it wasn't necessary. The wires were clean in that part as well as the rest of the harness.
Sorry for rambling on, but basically what I'm wondering is if the MSII is worth the extra money over a stock EEC-IV system in a bone stock application as a permanent fix for my problem, or if I would be better off sticking with EEC-IV and finding my problem. Looking for future reliability, least headache, cheapest, least work in that order of importance.
Thanks,
Andrew
I am torn on what to do with my '91 bronco. I just cooked my third EEC-IV PCM. I replaced parts of the wiring harness after the second thinking that was the problem, but honestly the old harness was cleaner. That's actually why I bought the truck when it had the 351W in it because the wiring was so clean and original. The 300 I put in was equally as clean, and everything was plugged in factory.
I have run a few EEC-IV controlled Fords in the past, so I realize that this is not the norm. This is the first one I've ever had a problem with. It is however making miss my beloved 73-79s. Dang rust belt.
The wiring on the Bronco is very clean, but most of the connectors are corroded. I have cleaned them as best I can, but I am wondering if this could be the problem? I hate to rewire the whole engine control harness just for some corroded connectors. I saw a TSB for corroded connectors, but is this for everything?
This motor is bone stock 1993 by the way. I've had no need for mods yet, and have been enjoying 18MPG in a full size Bronco (when the ECM actually works correctly.) This does not mean that I won't do any in the future, but I have no plans to as of now.
I have been kind of drooling over the MSII diy kit along with the harness and stimulator. At $385 before shipping, it is a bit steep for a stock application I think, but might be worth it for the long haul, as I could always adapt it to pretty much any vehicle.
I'm just not sure I'm ready to give up on the EEC-IV just yet. I can grab a breakout box for it on eBay for under $100. I'm cheap so this is kind of appealing, along with a 4th $35 junkyard special EEC-IV. I will however spend the extra if it will save me a lot of headache.
I'm just not sure. The harness looks so nice, I even checked it for that TSB with the grounded shield rubbing through the wire insulation. TSB had not been done, so I did it, but it wasn't necessary. The wires were clean in that part as well as the rest of the harness.
Sorry for rambling on, but basically what I'm wondering is if the MSII is worth the extra money over a stock EEC-IV system in a bone stock application as a permanent fix for my problem, or if I would be better off sticking with EEC-IV and finding my problem. Looking for future reliability, least headache, cheapest, least work in that order of importance.
Thanks,
Andrew