Just tuned a C&L 76mm Maf and 70mm TB on a 98 4.0 SOHC.. | Ford Explorer Forums - Serious Explorations

  • Register Today It's free!

Just tuned a C&L 76mm Maf and 70mm TB on a 98 4.0 SOHC..


March 30, 2001
Reaction score
City, State
Jasper, Alabama
Year, Model & Trim Level
2005 Roush GT
Hey guys,

Well I just had a guy leave with a 76mm C&L mass air meter along with a 70mm TB on a 4.0 SOHC, 98 model. The C&L had a clamp on filter on the end of it as well and his idle quality wasn't all that great and his CEL was coming on.

After a few tweaks to the MAF transfer function we got it straight and his CEL is no more along with a great idle. We plan on going to the dyno April 9th to see what kind of numbers he's gonna make as he has EVERYTHING. JBA headers, 3" MAC exhaust, 76mm C&L, and a 70mm TB in a 98 auto Sport. Should be interesting.

The biggest thing was this TB, he used a 70mm 4.6 GT Motorsports TB and he had to modify the intake behind the TB a bit it fits perfectly and even the throttle and cruise cable hook right up. It looks great and responds well to throttle too.

This is gonna be a fun one, who knows we may even be able to make the factory HP rating at the wheels. We'll see! :)

This also gives me the full transfer function of the 76mm C&L Maf for an Explorer, C&L is sending me a 73mm MAF as well to try out that day that should be a pretty much stock replacement. So if anyone wants to get a 76mm C&L and needs a tune just let me know.

Thanks, Doug.

P.S. On a side note, I hear that Pro-M's won't be anymore problems in the future, or should I say what future for Pro-M ;)