Enhanced Control Unit: Standard Motor Products AC543 Review

Before you spend a fortune on a catalytic converter, try this part and an oxygen sensor. $80 vs $300. Cats don't usually wear out - these are other issues that cause them to fail. Also, my Libby went from 13-14 mpg City to 16-17.

Standard has been my favorite auto parts brand since the 1980's. This part fit perfectly and worked without any adjustments or tweaks; Exactly what you want in a service part.

Purchased to replace the 'WVE/AIRTEX/WELLS 2H1095' pneumatic control valve which did not fit in the stock electrical connector. Only problems with the WVE valve. The standard motor product worked great. There are no issues with fit and functionality.

My WJ 4.7L was spinning at start looking for a good idle. Replaced with this block and he got used to it. 2 months later and it's still working fine. Do yourself a favor and clean the throttle body cavity with a carburetor cleaner before installing a new one.

item delivered on time and fits perfectly. In fact, it came with an o-ring and gasket to fit any throttle body design. Replaced OEM TPS on 4.7L engine. Eliminates "hunting" at idle, harsh shifts, and overdrive 'on' and 'off'. Before installing the valve, make sure the air control port is not contaminated with carbon. Very happy with the results. Why not 5 stars? American Fulfillment Services' shipping packaging was grossly inadequate. The box was thin, the ends of the package were folded but…