Hi all,
During a recent long roadtrip in my (previously well-running) 1990 EJ22 automatic conversion, some serious hesitation, stumbling, and stalling began. It seems to happen pretty randomly, infrequently at first and may have gotten worse in the past few days.
Code 49 appeared after the first stall, and I tried cleaning the AFM with carb cleaner then some other things that were probably needed anyway (new plugs and leads, new fuel pump and filters, found and fixed some small potential vacuum and intake air leaks, etc). But I still have the symptoms, so I'm back to focusing on the AFM...
*Question 1: Can someone tell me how to test voltage the 5 ports on the AFM connector? What I think is the ground is reading .018 ohms to ground, is that too high?
Also considering the IAC. I noticed that my IAC connector has 3 ports (the middle reads 12v) but the IAC itself only has 2 outer pins (no middle!).
*Question 2: Could it be that I have the wrong IAC for my set-up? Could this lead to rich-running and gunking up the engine, causing my stumbling/ stalling?
Here's the numbers as I know them:
Engine: 1990 ej22 from a manual legacy (now in automatic Vanagon)
ECU: AA562
AFM: AA170
IAC: 2-pin (don't know the number)
Thanks for any help!
Joseph
