Stutter upon acceleration

I purchased new a 2001 Tacoma, dbl cab 4x4, June 2001. I have accumulated 256,000 miles. I can say I have well maintain this vehicle. yes timing belt has been changed twice. Next schedule is at 270,000 mile. Neverthe less the truck today, stutter upon acceleration.. eventually it smooth out, but sporatically stutter as I drive.. low speed/rpms is worse.

Check engine light has been coming on/off recently.. current state is on.

The mechanic replaced the MAF sensor, however the truck continue to stutter.

Any advice?

 

Any idea what the CEL is calling for? I think that'd be a start.

TB clean? Sparks changed? Wires and coil packs tested and ok?

 

You are correct..... changed spark plugs, wires, and tuned to specs....TB will be replaced at 270k. Humm, probably did not need to change the maf sensor. BTW, the wires were the original, plugs i changed winter 2009, and the kind i used were single point... thinking I would save gas as opposed to the dual point...did not notice a different.. Thanks for the sound advice.

 

i would double check spark plugs ...

 

I remember seeing somewhere... Either the timing belt cover or the owners manual... that you should only use dual electrode plugs.

Get the OEM Densos or NGKs and try that out... I try not to stray away from the manual recommendations.

Keep us posted.