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1998 Chevy Suburban miss

Tiny
COYOTE
  • MEMBER
  • 1998 CHEVROLET SUBURBAN
Engine Mechanical problem
1998 Chevy Suburban V8 Four Wheel Drive Automatic

I tryed to smog my chevy in nevada if failed and 3 codes
1)p0306. Cylinder 6 miss fire
2)p0430. Catalyst system efficiency below threshold (bank 2)
3p0758. Shift solenoid b electrical
can anyone please tell me if the miss fire is a spark plug and or wire problem and where the shift b solenoid is thank you
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Thursday, November 13th, 2008 AT 12:14 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Could be spark plug, wire, compression and injector problem on that cylinder-

Misfires can be caused by worn or fouled spark plugs, a weak spark (weak coil, bad spark plug wire), loss of compression, vacuum leaks, anything that causes an unusually lean fuel mixture (lean misfire), an EGR valve that is stuck open, dirty fuel injectors, low fuel pressure, or even bad fuel.

Shift B solenoid is in the transmission
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Thursday, November 13th, 2008 AT 3:29 AM

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