95 3.0auto 4x4 bucking/power spikes

92mr2turbo

New member
So i'm a fairly experience mechanic but cant figure out this issue. I do not want to spend lots of money hunting it down, and replacing parts that dont need to be replaced.

So i have a 95 3.0 3vze 4x4 automatic.

In overdrive specifically when you are just cruising if the rpms go below 2000rpm it starts bucking hard, releasing or adding more throttle makes the bucking stop. It does happen in other gears but its harder to make it happen because of how slow you would be moving.

The other issue is sometimes it feels like i have no power then at about 3400 rpms it feel like a turbo or big timing advance kicked in. ( same gear, not downshifting) The timing is set correctly.

All ignition components have been changed. except for the Ignitor and coil. But this does not seem like a miss fire anyway.
 
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My 88 4runner with the 22re was doing that for a few days. I cleaned the throttle body real good and adjusted my tps and it stopped. I would start there. My train of thought on my problem was some sort of inconsistency in the air/fuel flow on the throttle body.
 
sounds like a fuel surge to me. check the fuel pressure through the power band and if it flutters then you got your demon
 

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