MY TRUCK HAS A MISFIRE LOSES POWER GOING UP HILL...

1993 Nissan Hardbody

Tiny

snoman3389

March, 31, 2013 AT 9:24 PM

My truck has a misfire, loses power going up hill and bogs down to almost shuts off when I push the accelerator to the floor. I have changed the mass air flow sensor, O2 sensor, spark plugs and wires. I don't know what else it could be.

FOUND 692 RELATED QUESTIONS

2 Answers

Tiny

rasmataz

March, 31, 2013 AT 9:27 PM

Check and test the throttle position sensor closed and wide open throttle voltages and also the exhaust system for restriction

Tiny

snoman3389

April, 2, 2013 AT 12:47 AM

I changed the throttle position sensor today and the exhause is clear except for a leak at a flange. Nothing changed, except I noticed that my air intake box where my air filter is has a high pitch whistling sound when the engine is revved. I'm at a loss.

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