Mechanics

TRUCK STUMBLES/HESITATES UNDER POWER.

1994 Mazda b4000 • 205,000 miles

This manual transmission has probs when accelerating. Idle is ok. When stumbling, shifting into neutral stops the problem. On level ground, at constant speed, say 55 mph, car runs smooth, but trying to accelerate will start the stumbling. Foot off the gas ends the stumbling. Same exact symptoms when using Cruise Control. Using Cruise Control (CC) on level road at constant speed works fine. Approaching hill, where CC attempts to accelerate to maintain vehicle speed, car begins to stumble badly. When car back to level ground and at set speed, no more stumble.
Avatar
Saw45
November 12, 2011.




Hi
have you done any replacing of parts lately to try and fix?

Tiny
Fixitmr
Nov 12, 2011.
Top of my head guess is OX sensor.
AD

Tiny
Fixitmr
Nov 12, 2011.

AD