3VZE AFM adjustment
#2
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!!!
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!!!
#3
Registered User
Thread Starter
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?
Is your ignition timing stock?
#6
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...
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...
Last edited by MudHippy; 02-09-2010 at 01:58 PM.
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#8
Registered User
Thread Starter
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.
#9
Registered User
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.
#10
Registered User
Thread Starter
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.
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.
#11
Registered User
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
#12
Registered User
Thread Starter
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?
#13
Registered User
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
#14
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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.).
#16
Registered User
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.).
#17
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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.
#18
Registered User
Thread Starter
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.
#19
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?
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.
#20
Registered User
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.