JMortensen Posted September 13, 2003 Share Posted September 13, 2003 I just put a long block in my '93 Toy 2wd. I am having a strange problem with the AFM. It is honking! Sounds like a very quiet car horn. It does this at idle, but then it seems to go away when the truck warms up or when RPMS get over about 2000 (no tach, so that's my best guess). The only previous experience I have messing with this AFM is about 10 years ago I opened it up and richened the mixture to go with a camshaft I had purchased. Other than that, its been doing its job with no complaints. I am not really fond of FI, and I don't really know much about it. Maybe if I was a little more FI friendly I'd learn something about it so I didn't have to ask questions... I also had a idle surging problem, to fix that I cleaned the throttle body and reset the TPS. That seems to have fixed the surge, but I still have no clue on the honking AFM. Any help appreciated. Jon Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted September 16, 2003 Share Posted September 16, 2003 HONKING AIR FLOW METER??? NEVER HEARD THAT ONE BEFORE, I HAVE AN 85 SUPRA /5M-GE WITH A STUMMBLE, I K.I.S.S. ED THEN CHANGED PLGS, WIRS, CAP, ROT.,NEW FUEL FILTER, STILL STUMMBLES, WAT U THINK?? Quote Link to comment Share on other sites More sharing options...
JMortensen Posted September 16, 2003 Author Share Posted September 16, 2003 I'm not sure what the heck is going on with this thing. I know this forum is probably not the place to ask, but I'm pretty stuck. A week before I moved the old engine developed a nasty knock. So off I go to buy a rebuilt longblock since I don't have time to build one right now, and now its running, but this weird problem develops. Now I'm right in the middle of moving and it's still acting strange. I may just have to take the truck to a Toy specialist. All of my friends in CA were mechanics, and a few of them were particularly good with 22RE's, but none of them has a clue what could be causing this problem. I'd prefer triples and an O2 sensor anyday. Kinda backwards, I know. I did change plugs and wires, cap and rotor looked good, BTW. Jon Quote Link to comment Share on other sites More sharing options...
SleeperZ Posted September 16, 2003 Share Posted September 16, 2003 I'm scratching my head on the honking thing too....I have an '89 Toyota 4x4. Does it move smoothly? Maybe the return spring is binding, or the pivot point is sticking a bit. BTW, I tried the rich/lean thing with my AFM a while back, thinking it was like a Z, and could never get the AFM to affect the mixture at all. I think the ECU must constantly update it's maps with the O2 readings, and the only thing the AFM does is give relative measurements. Quote Link to comment Share on other sites More sharing options...
JMortensen Posted September 16, 2003 Author Share Posted September 16, 2003 I'll check and see if it moves freely. I did the AFM change after buying a cam and reading about it in the Downey catalog. Can't say I felt a difference either. I can tell you that with 2 1/4 exhaust, some mild porting and the cam I could get 32 mpg, and more power than stock . Too bad I couldn't use that head on the new motor. Didn't have time to have it rebuilt. I'm going to send it back to the engine builder as a core. Jon Quote Link to comment Share on other sites More sharing options...
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