az4x4runner

Has anyone here tried adjusting their AFM on the 3VZE as described here? If so, notice any difference?

Edit: If you have, how many clicks?

MudHippy

Yes, 3 clicks lean.

Tried 4 clicks, engine wouldn't idle smooth.

I HIGHLY recommend it. These engines are tuned way too rich from the factory.

I saw better mpgs and improved throttle response. Don't take my, or anybodies here, word for it though.

TRY IT!!!

az4x4runner

I set it 2 clicks lean shortly after my original post.. I can't really tell if there is a difference yet. I am going to be getting on the freeway tonight for a while, maybe I will notice more then.

Is your ignition timing stock?

MudHippy

Nope, way past stock. Around 24* BTDC or so. Plugs gapped to .036" and 8mm ACCEL super stock solid core wires.

az4x4runner

How long have you been running this setup for? Any pinging?

MudHippy

A few years now, no pinging.

I've also graduated up to 92 octane fuel. I can squeeze a degree or two more advance that way.

87 and 89 octane worked too. Just had to back-off on the timing a tad.

The ISR mod I did after the fact. That seemed to improve performance even further. So I recommend that too.

Another tuning factor would be that my exhaust isn't stock either. Practically straight pipe, with a 1/2 empty cat in the way. No muffler. LOW BACK-PRESSURE!

Other than that stock...

az4x4runner

Well, in addition to my 2 clicks lean, I set the timing at 15° BTDC. I'll see how it goes today..

az4x4runner

My 3vze does what seems to be the normal ticking (valves/lifters?). I will try and listen for any pinging, though everything sounds ok going down the street in my neighborhood. I'll be heading to work soon so the freeway should be a good test, there is a lot of uphill.

dfarr67

Actaully I've not been happy with the amount of soot on the tailpipe for awhile now which tells me the 22re is running rich. Anybody actually use a WB O2 to set up the afm? I wanted to avoid mucking with factory but....if the engine is happy then it's money in my pocket.

az4x4runner

Well I had to do a lot of driving around today.. so.. got a full tank of gas and threw the timing light in the truck. What I discovered is my 3.0 seems to like around 12° BTDC the best with 87 octane. I don't know for sure but by seat of the pants feel at least.

I noticed on the freeway there were certain hills I'd lose speed on usually unless the tranny downshifted, I was able to hold speed and even slightly accelerate tonight! Also on some of the city streets were I would be cruising at ~2000 rpm I was sittin around 1500.

Overall I am happy, a little more power out of the 3VZE and no pinging. I am curious to see my gas mileage on this tank.

Booosted Supra

I just took my AFM off my 3V and I leaned out 3 clicks, stock timing, no EGR system, ISR mod, catback exhaust and hi flow cat. I will let you know if I have any differences... I can tell you right now my truck idles a hell of a lot smoother right off the bat

az4x4runner

Speaking of the ISR mod... MudHippy I found in an older post of yours that your intake silencer is "blocked off". How did you go about doing that?

Booosted Supra

scratch that, I just checked again and I had it at 4 clicks but my truck idles just fine, throttle response is actually there now when I hit the gas which is neat for the 3.0 unsure of gas mileage differences at the moment I will log when I fill up at the pump this week... I run 93 Octane in my truck too so I dont know if that has anything to do with why my truck idles on 4 clicks compared to Mudhippys rig

TNRabbit

Anyone who is making adjustments to their VAFM is PROBABLY chasing another reason they're running rich/lean. The ONLY reason you should need to change the VAFM adjustment is if you have changed something in your engine (compression ratio, high performance injectors, etc.).

Booosted Supra

I'm going to adjust my timing today, seems like everyone likes to go from stock 10* BTDC to around 12-15*

Booosted Supra

Tightening and loosening the spring would make the door on the VAFM harder or easier to open so it would create a leaner/richer tuning area so I'm now quite sure I follow you on that though I do agree with it should be a def if something was changed on the engine

TNRabbit

What I was trying to say is that if you find yourself having to adjust your VAFM to make the engine run leaner or richer, and you HAVEN'T made any performance changes to the engine, there is another problem you need to fix before you make that adjustment.

az4x4runner

You may be able to run it at 15 BTDC or more if you wanna play with it, since you are using 93 octane. I stuck with 12, mine seems to like it the best and I don't want to have to spend any more money on gas than I already do driving 25-30 mile round trip to work every day with this beast.

MudHippy

I removed the silencer chamber thing that connects to the intake hose. Then plugged up the hole in the intake hose with a spray paint can lid and used the original hose clamp to seal it up tight against the cap. Then plugged the hose that went to the silencer deally with a rubber stopper.

I have redone the whole thing since then. It's now just your typical "3" pvc pipe elbow" ISR mod. I tapped into it to leave the PCV system funtional.

Booosted Supra

I see what your saying, I agree with that to an extent but I do know for a fact that Toyota's are tuned on the rich side, I work on them all day and I can see the numbers on the techstream

I just made a 15* adjustment and she is very happy with it, I saw the little 15* timing mark... How do you guys that are going 17-22* get that number? Are you just using your best judgment or is there a special timing gun out there for that? I would like to see how much farther I can go because the truck I can tell you right now runs 1000 times better and I dont have any real data yet on MPG or anything but I can tell you I have more gas in my truck today than I would with my commute I usually would have burned 1/4 tank but it has barely budged