2004 b4000 while driving it dies but when put in neutral it starts right back up.I cant seem to accelerate without it shaking or dying. Ive replaced fuel pump,throttle positioning sensor, rep wires.

Asked by Sep 09, 2019 at 09:18 AM about the 2004 Mazda B-Series

Question type: Maintenance & Repair

What can it be besides throttle pos sensor or fuel pump?

1 Answer


Might be a bad battery combined with a bad alternator, or a loss of fuel and spark together. Might be as simple as a really dirty air cleaner. Or maybe something related to fuel pressure, like a fuel pump relay, or even the Electronic Throttle Control (ETC). These are symptoms of "dying in flight" and there are many possible causes. You need to have a mechanic diagnose this.

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