1st Gen 4R from Florida

[misterjack]

Hello new friends. I have my second 89 4R. My first was an 89 with the 22RE. Trading that unit in was the second biggest mistake of my life. I now have an 89 with the 3.0 V6 and love it. Pulled it out of a farm field saved it from the cannibals.

I have a current problem I can't quite diagnose. About 500 miles ago I gave her a new set of plugs and distributor. It made a huge difference immediately. One day I start her up and she is missing terribly. I have replaced the coil, then the igniter and then the MAF housing to no avail. Removed and cleaned the cold start injector. Still nothing.

I'm looking for the next step. I don't mind browsing old postings but there are over 1200 of them in the 1st G section alone. Any recommendations?

 

[KidVermicious]

What plugs did you use? The 22RE and 3VZE don't like anything but basic Denso or NGK coppers. If you're using fancy plugs, ditch them and switch to a basic plug from Denso or NGK.

Is it missing on any particular cylinder? Try pulling ignition wires one at a time - if you pull one and it doesn't get worse, that's the cylinder that's missing. If it's missing on all cylinders, maybe check your timing? Check your compression too, you could have a blown HG. I would definitely stop throwing parts at it though, find out what's wrong first.

 

[misterjack]

Using NGK plugs, the ones recommended by the manual. Properly gaped as well. I will be checking the timing and update.

One other item I forgot to mention. Back when it was running good there was an initial RPM increase at start-up. This is no longer the case.:hand: