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1994 Nissan Pathfinder rough idle, very rich condition once

Tiny
FMF
  • MEMBER
  • 1994 NISSAN PATHFINDER
  • 6 CYL
  • 4WD
  • MANUAL
  • 118,000 MILES
The pathfinder starts fine, idles great, and runs great when cold. Once it reaches operating temperature, it will barely idle, smells very very rich, and runs very rough under 2500 rpms. I'm having trouble pulling codes, but I'm thinking O2 sensor? I plan on checking the MAF sensor tonight, its got a cold air intake and I recently cleaned and oiled the air filter when I changed all plugs, wires, oil, filter.
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Thursday, February 25th, 2010 AT 8:31 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Hi fmf, Welcome to 2carpros and TY for the donation

Your probable causes here could be the oxygen sensor, leaking injectors and fuel pressure regulator, clogged fuel return line, and out of calibration coolant temperature sensor-
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Thursday, February 25th, 2010 AT 9:32 AM

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