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Check engine light is on, runs rough when shifting gears

Tiny
MIKE WOOD2
  • MEMBER
  • 1994 NISSAN TRUCK
  • 3.6L
  • V6
  • 4WD
  • MANUAL
  • 135,000 MILES
94 Nissan pickup, check engine light is on and it seems to be running rough when accelerating and when shifting gears, especially when going from 4th to 5th gear. Runs smoother when at speed, but loses power when going uphill and runs rough again.

Changed plugs, plug cables, fuel and air filter. O2 sensor bad maybe? Vac problem? Not sure where to go next with this.
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Sunday, May 5th, 2019 AT 12:30 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,959 POSTS
Hello,

It sounds like you have a vacuum leak or misfire, did you do cap and rotor? Also we should get the codes here is a guide to help walk you through the steps.

https://www.2carpros.com/articles/nissan-obd1-diagnostic-trouble-codes-and-retrieval-procedure-1984-to-1994

and

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

Please run down this guide and report back.
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Monday, May 6th, 2019 AT 4:13 PM

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