TFI upgrade
This is a mod that I did because I had to do a tune up anyways . I did this before I had even driven it on the road so I can’t say if it gave any improvements on it’s own .
This really shouldn’t be considered a performance upgrade but rather a correction to the system . Doing this ignition upgrade will just allow the system to send spark to the plugs without loosing as much spark energy . As my build progresses and I add a coil , it will let me get the most benefit from the new coil without the distributor cap , rotor and plug wires being the week link .
The TFI upgrade may be the easiest mod you could ever do on your Jeep . It is meant for a Jeep with a 4.2 straight 6 and not the 4.0 . I did this while it was around 20 degrees outside in about 2 feet or more of snow . This mod is usually referred to as the Team Rush Upgrade and full credit should be given as such . This is by far the best writeup I have ever seen on this subject TEAM RUSH UPGRADE
For the TFI upgrade you will need the following…
- Distributor cap
- Distributor cap adapter base
- Rotor
- New plug wires
All the parts can be found at your local parts store for a 1982 Ford F100 with the straight six engine .
Nutter bypass
At 70 k miles my computer is fine , right ?
I thought so anyways . My wrangler runs pretty well with the almost stock 4.2 . I am currently running a Weber 38/38 electric choke carb ( although I feel it is to big for a stock engine ) which the previous owner had installed . I also did the TEAM RUSH UPGRADE , but I am still running a stock coil .
My jeep would tend to run rough at times . I would adjust the carb trying to get it to smooth out . The times it would really act up is when I would be driving at a decent speed or for a few minutes with my foot on the gas . When I would come to a light or coming down the off ramp , it would just stall . It would start right back up no problem .
I checked the timing again … checked vacuum line over and over … adjusted the card mixture settings so many time I must have worn out a screwdriver ( I could never adjust it to the baseline settings without it stalling ). So I rebuilt the carb but , still stalling .
One day I got inspired and decided to re-do my vacuum lines . I didn’t remove any because I had done most of that already , I just wanted to get rid of all the junk and extra line . While I was under the hood , I figured what the heck , I’ll do the Nutter bypass . It seams that my ECM was not as good as I thought because all my stalling problems are gone and when I adjust my mixture screws , they actually do something !!!
MY CHEAP JEEP 