Rod knock isn't "common" with the 2.3. Some engines live harder lives than others.
As a minimum, you'd have to pull the crank & have it machined down .010. The new bearings would be - .010 to fit.
You may also need to have the big ends of the rods re-sized if they have gone out of round.
The voltage regulator may be on the way out. It may fail soon or, like my work truck, last a long time. It's one of those things that can't be predicted.
Go to the Ranger and B-Series board. The third post there is a "sticky" called "Technical Information". Click on it and scroll down to "Pulling EEC-IV Codes". It would stand to reason that there's a faulty sensor or other part that is causing the irregular idle problem.
97 Ranger (metric half ton) 2.3,5spd. Saphire blue metalic w/matching cap & Stock Rims 4 winter.
92 Town Car....Sweet PITA.
90 BII 4x4 Ongoing Project, aka PITA
63 Fairlane, Gone to my buddy Chuck.
It Aint Fun Unless It's Done The Hard Way!
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company.