My truck has a misfire, loses power going up.

Tiny
SNOMAN3389
  • 1993 NISSAN HARDBODY
  • 147,000 MILES

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.

Do you
have the same problem?
Yes
No
Sunday, March 31st, 2013 AT 9:24 PM

2 Replies

Tiny
RASMATAZ
  • MEMBER

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

Was this
answer
helpful?
Yes
No
Sunday, March 31st, 2013 AT 9:27 PM
Tiny
SNOMAN3389
  • MEMBER

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.

Was this
answer
helpful?
Yes
No
Tuesday, April 2nd, 2013 AT 12:47 AM

Please login or register to post a reply.

Related Mass Air Flow Sensor MAF Replace/Remove Questions

Recommended articles