Toyota 8FGCU25:
High CO level at warm idle.

Have a LP only toyota that is reading 6% at idle and drops down to 0.2% at higher idle. I have drained the propane converter and cleaned out the entire intake column including cleaning carb and throttle pieces and new air filter. Is there a way to adjust the air/fuel mixture? Am I missing something? Could it just be a sensor? Any advice would be appreciated. Thanks. Engine is a 4Y
  • Posted 20 May 2014 13:42
  • Modified 21 May 2014 13:51 by poster
  • Discussion started by jorgeconsuelo
  • North Dakota, United States
Showing items 1 - 3 of 3 results.
the truck has about 8000 hours on it. I am using a handheld CO detector. Plugs, cap, and rotor are all in good shape. I did a little research and was able to adjust the air/fuel mixture. There is a little screw under a cap on the propane converter which i adjusted until the level was back down to.1% or lower. There were no codes. I was just doing the scheduled check and was very surprised when i saw the high numbers. Checked here and the toyota service manual, and decided to mess around until I got it back to normal. Thanks for all the input, hope I could or can help you too.
  • Posted 25 Jun 2014 14:21
  • Reply by jorgeconsuelo
  • North Dakota, United States
How many hours on this truck? What do the spark plugs look like???
  • Posted 25 Jun 2014 11:53
  • Reply by kevin_t
  • Pennsylvania, United States
Not sure why your getting much of anything out of the exhaust at idle with out any error codes? What are you using to check the percentage of CO? If you had a problem with any sensor you would have error codes. Without an on-board or hand held you will not be able to see any readings to make any adjustments. You may have to go to your local dealer and have them look at things and make adjustments if needed.
  • Posted 25 Jun 2014 11:16
  • Reply by Bulldog965
  • Indiana, United States
Richard

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