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.
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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