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My rig has suffered HWB (Hot Weather Bug) since I got her. My TFI-PIP assembly just doesn't like hot weather. During winter everything is OK, but as soon as temperature rises above 86 degrees I have problems. I made a patch and problem was solved at highway speeds but at lower speeds the bug attacked again. So I decided to go for the remote TFI module location. I read several write-ups in this and other forums (John Olds write up, csn.rebel write up , TFI ground discussion), I asked some questions (thanks Steve83 and SigEpBlue) and finally came to what I think will be a solution. The main problem to my opinion is the harness to connect the module to the distributor, so I came up with this:
I decided to use an old TFI module as plug to the distributor. I think that way the distributor will be as isolated from dust and moisture as OEM. So I opened the TFI
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All the electronic is covered by a sticky stuff, very difficult to remove. After trying to remove the sticky sh&@#t with screw driver, pliers, etc. I decided to remove the back plate
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After removing the back plate, I carefully removed the electronic circuit and the sticky stuff in order to preserve the connections to the flat spade connectors. The circles show which pin goes where. The rest are useless.
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Drilled a hole for the wires
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After soldering cables, some hot glue
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For the other end of the harness I wanted a real plug to fit the module. Couldn't find one so I built it. I used one of these computer connectors
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I removed the small step in the front
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I used braided cable for the harness and welded female spade connectors
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After that, placed the plug and used my glue gun to bond/protect/isolate the connectors
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Filled all the plug wit hot glue and closed it
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Some non-adhesive tape and the harness was almost ready. Later I soldered ground connections.
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I got a heat sink from a '94. After sand blasting I removed 7 fins and partially another 2
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I did it that way so the fins will keep the connector in place avoiding disconnection
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I was going to locate the module in the driver side fender, but decided to make the harness shorter and locate it in the way of the air flow produced by the fan. Made a small bracket to place the heat sink and it ended up here:
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I have some concerns about this location because in case my A/C belt goes the module is very close, so I made the bracket strong enough to resist the shock (2.5 mm stainless steel). All I have to do now is pray so the belt doesn't catch my new harness .........
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Removed the module from the distributor and connected the dummy module harness. Picture is not good but will do.
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At this point I discovered that my harness has a problem. Cables come from the dummy module connector straight back, and this makes difficult to fit the connector in the distributor because the new harness touches the coil or the main harness. If I have to do it again I'll drill a hole in the side of the module and take the cables straight up. That way it will be easier to mount the harness in the distributor. Next picture shows what I mean
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Some grease in the heat sink
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Plug the module to the connector before placing the module in the heat sink (otherwise you will not be able to plug it) and connect the ground (showed in the picture).
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Connect the module (don't need to extend the cables !!!), check timing and be sure everything is in placeand you're ready to go.
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Remote TFI
