Am I missing something???

[91'4bee]

So in the posted thread I had a random misfire at 1500rpm that had been going on for a while. I replaced the plugs and tested the wires. The resistance was good on the wires and TPS. I had no codes and it still random misfired at 1500rpm.

So...I removed the ignition tune(its been on for almost 3 years) and set everything back to stock except the full exhaust (now its really slow...still have get used to it). And wouldnt you know it the random misfire went away! But the fluctuation in idle is back if I hold the rpms anywhere between idle and 2000 rpm.

The problems (besides being extra slow now and the fluctuating-ness) is that I feel a bog just off idle and somewhere between 1500-2500 rpm. Now I am really stumped...because the TPS tested good per FSM. Only other thing I can think of is fuel pump because the fuel filter was replaced 2 years ago.

Am I missing something?? I basically have done what I would have told anyone else on this forum to do when they experience these problems so...:noidea: Oh and the motor is a 3vze and a 5 speed trans

The other thread...
http://www.toyota-4runner.org/classic-t4rs/179277-3vze-random-misfire.html

Thank you for taking the time and appreciate any suggestions:wave:

 

[KidVermicious]

Just spitballing, but how clean is your throttle body?

 

[91'4bee]

Just spitballing, but how clean is your throttle body?

Well when I pulled the intake hose off when I did the plugs, the plate was pretty clean. I cleaned it maybe 4-6 months ago and it wasnt even that dirty then. It cant be my K@N filter could it? It is not really dirty and I cleaned it not that long ago either (I didnt over oil it).

I still dont have any codes but would it be possible that a bad spot in the AFM cause it? I havent tested it but I was told that, like an ignition coil, it either works or it doesnt. The O2 sensor is 10 years old but my gas mileage is still "normal"

Kinda at a loss here. I mean these are small things happening because it is only when I use a 1/16th? of the throttle, how i drive normally, but when anywhere past that on the skinny peddle as far as I can tell no bogging in those rpm ranges.

 

[mikesmith140]

Have you checked your fuel injectors? Mine created a strange issue similar to yours when my #2 fuel injector was weak. Replaced it and everything returned to normal.

 

[KidVermicious]

I still dont have any codes but would it be possible that a bad spot in the AFM cause it? I havent tested it but I was told that, like an ignition coil, it either works or it doesnt.

Well, when they say that they just mean it can't be adjusted the way your TPS can. But it's still a potentiometer and can have bad spots. I suppose that could cause your trouble.

4Crawler is wise, 4Crawler knows all:
Toyota 22RE Air Flow Meter (AFM)

I don't think the K&N would cause it, but you could always put it back to stock and see if that changes anything. I'd get rid of that dust magnet on general principle, but I'm aware that not everybody is as enlightened as I am.

 

[91'4bee]

I don't think the K&N would cause it, but you could always put it back to stock and see if that changes anything. I'd get rid of that dust magnet on general principle, but I'm aware that not everybody is as enlightened as I am.

lol. It was a gift and I think its pretty cool. So far I haven't had problems but yes I guess that makes me not as enlightened :laugh:

Have you checked your fuel injectors? Mine created a strange issue similar to yours when my #2 fuel injector was weak. Replaced it and everything returned to normal.

I have not checked them. They are the original ones as well. I was told, just because they are that old, to pull them and have them rebuilt, and while the car is down replace the fuel pump(its original too). But its my DD and I dont have another ride and cant afford to have it down especially now that I started a second job that is farther away from where I live