My 3.0 starts and idles fine,but when driving down the road it starts this crazy bucking. If I give it full throttle it will backfire or pop through the engine compartment.

I have read alot of forums on this does this sound like the TPS? I have new plugs wires cap and rotor. Also new fuel filter. What about the temp. sensor I read something on it to but have now idea where these items are I dont have a FSM.

Would SEAFOAM work on this? Read about it to just wondering if I am working on a carbon problem, electric, or fuel. Thanks in advance
Joe

 

Joe, I had the same thing happen to me on my 90 4runner 3.slow (3.0). I would drive down the road and without warning it would stumble. It didn't matter what gear, or speed or rpm. It would stumble then be fine again. Other wise it ran fine. I ended up taking the Air Flow Meter (AFM) apart and cleaning the circuit board and repositioning the metal contact strip and the thing has not stumbled since, 4months later.

 

Well it only took 3 years for the guy to get an answer.Isnt that some kind of yotatech record?

 

Better late than never.