Hi all, My 1994 Pickup 22RE AFM has been giving me headaches the last year or so just randomly shutting my engine down and sometimes hampering my restarting. It's only happened a couple of times and usually restarted. The other day I grew more concerned. I also saw a check engine light and read it at 31. My 22RE still has it's original AFM and the Circuit opening relay. I jumped the check test connector from B+ to FP and it's never been smoother running. I actually measured the intermittent the FC and E1 switch condition and found it intermittent even when I physically turned the vane by hand. I opened the plastic cover on my ATM and can visibly see very small contact first pin (Fc) internally. The second pin E1 looked much better and was a good connection to ground. I could apply pressure to the switch arms and it would close but not make the electrical connection. I also took the opportunity to test the resistance readings outlined in the 4crawler troubleshooting guide. https://www.4crawler.com/4x4/CheapTr...roubleshooting
I cleaned the resistive pad and wiper contact and it looked good. My thermistor read correctly also. I currently have 314K miles. All the stock is dwindling on the 22RE AFM (ebay, Amazon, Cardone, Autozone, Napa, Oreilly) I finally found a Amazon seller that had solid reviews. One of them even mentioned they checked the resistance readings and put it in and it worked great. I placed an order for the unit but shows it won't be delivered til after Christmas. I contacted the seller, it's in China and he says he is one of the few manufacturers in China. Many other sellers reviews show a lot of problems with the units working. Almost all list a year warranty. The Toyota part number is 2225035050. Cardone shows part number 74-20055 but are extremely hard to find. Is everyone else showing the same problems. At one time one person mentioned he had started a business of refurbishing the Toyota units but I can't find him anymore.