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1986 Chevy Celebrity Adjust carb w/ OBD I Scanner?

Tiny
ROBBIEREMLAP
  • MEMBER
  • 1986 CHEVROLET CELEBRITY
Engine Performance problem
1986 Chevy Celebrity 6 cyl Front Wheel Drive Automatic 1.4mil miles

Gentlemen:
GM has me adjusting the two adjustments on this carb (idle mixture and running-top) with dwell meter. Can I use my scanner on mixture control, for example to do the same? Setting might be 50%, for example. My scanner is an older OBD I Auto Xray. Thnx Rob
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Friday, March 6th, 2009 AT 9:16 AM

1 Reply

Tiny
MMPRINCE4000
  • MECHANIC
  • 8,548 POSTS
It would be a very difficult way to adjust a carb. The O2 sensor would measure the A/F ratio, but it would have to sample the mixture over a period of time, since they do not give immediate feedback.

If you want to adjust the carb. Properly, take it to a chassis dyno facility and hook up to a wideband O2 sensor.
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Monday, March 9th, 2009 AT 7:09 AM

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