1992 Gmc Sonoma Truck Running Rich Getting 7 Mpg Changed Plugs Wires Map

1992 GMC SONOMA
12,400 MILES
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ANONYMOUS
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  • 1 POST
The truck is running rich.I am getting 7 mpg.We changed the plugs and wires and map sensor.
Mar 17, 2013 at 10:09 PM
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JDL
  • ✓ASE Certified Mechanic
  • 16,098 POSTS
  • ASE Certified Mechanic
What is litre size of engine? Check cylinder compression, see if engine is in good mechanical condition. 02 sensors are part of a tuneup. Are there any applicable mil codes. You can check those codes, yourself. To check codes, use a jumper wire between the A & B terminals at the datalink connector. Turn key just till the dash lites come on, no further. Then the mil on the dash starts flashing, you count the flashes to get the codes. Your looking for two digit codes. Let us know what you find.
Mar 17, 2013 at 10:31 PM
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