Alero99

what brand should i replace the module with? i do not see any Motorcraft modules on 50resto.com

http://www.latemodelrestoration.com/...1&comp=LRS
http://www.latemodelrestoration.com/...1&comp=LRS
http://www.latemodelrestoration.com/...1&comp=LRS

im guessing i need that last one the tool

mjr46

you can get the tool at your local parts store and the tfi modules theysell should be sufficient at your local parts store

ponyponer

the motorcraft ones appear to be garbage sine they are always failing. don't know if they do make one thats any more durable or gives more longetivity though.

88fox50

i just changed mine and i forgot to mark the rotor position on the distribuor, so i had to re time the motor from TDC...incase something like this happens to you...this is a great thread . it helped me out so i figure ill spread it around. https://mustangforums.com/m_3264510/tm.htm

ameiurus

So there's no way to replace the module w/o pulling the distributor??? What size torx screws hold it in?

primetime5.0

you can replace it without pulling the dizzy... you can also use a deep slim socket to take it off

AdderMk2

LOL.. garbage because it has gone through thousands of heat cycles, and lasted 15-20 years...

thats a very ignorant comment you made. The problem isnt the module itself... It's the fact that Ford was stupid enough to put a heat sensitive piece of electronics... ON the motor!


you almost NEVER hear of the TFI going bad on an SN. But thats because its on the fenderwell, and has a HUGE heatsink on it.

89mustangfive0

how would you know when your tfi module's going bad...

PRO50SC

It won't start, due to lack of spark.

dave1170

Mine went bad 2 weeks ago. I went to Autozone and bought a new one, 2 weeks later that one is dead. It's all that heat coming from the motor that kills these things. Here's a link to do a no spark test to make sure it's the TFI module http://sbftech.com/index.php/topic,588.0.html