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Chevyguy · 05-01-2002, 09:45 AM

I got the Wells unit from Auto Zone. It's only $29.99 and others have had no troubles with them, I've only had mine on for a month or so. Plus they give you a Lifetime warranty and will test it for you too. AFAICT there are no "real" improvments avail for any aftermarket TFI. There were posts about a 91 5.8 Econoline being better, Auto Zone listed the same part# for both, perhaps a Motorcraft would be different. I thought the entire spark curve was handled by the ECM and the TFI module is just the electronic points!

05-01-2002, 09:45 AM	#4
Chevyguy Backyard Mechanic/Chemist Join Date: Feb 2001 Location: Acton MA USA Posts: 435	I got the Wells unit from Auto Zone. It's only $29.99 and others have had no troubles with them, I've only had mine on for a month or so. Plus they give you a Lifetime warranty and will test it for you too. AFAICT there are no "real" improvments avail for any aftermarket TFI. There were posts about a 91 5.8 Econoline being better, Auto Zone listed the same part# for both, perhaps a Motorcraft would be different. I thought the entire spark curve was handled by the ECM and the TFI module is just the electronic points! __________________ 2001 Crown Vic Maurader Airbox/MAF, DR chip Edel IAS shocks Single exhaust :wtf: 93 P-71 Vic interceptor Backup car now 90 5.0 LX Notch SOLD 74 Chevy Laguna type S-3 454 under construction Currently apart undergoing bodywork.