OBD-1 Code 25 "A/F Lean" Question Options

[jasonrobo02]

Hey all,

I've searched and I haven't been able to come up with an answer to what may be causing the CEL on my 1994. The CEL comes on once in awhile. I haven't noticed any change in driveability or gas mileage. The light will go off after turning off the car and will stay off until another "trip condition" occurs maybe 10 or 100 miles later. The code is stored in memory though and will blink a 25 when I jumper the diagnostic port.

I have recently replaced the 02 sensor and no change. I was hoping that someone had some insight as to what may be causing the CEL.

Thanks in advance for any help.

[wrathc5525]

if it was a vacuum leak something that my automotive teacher said you could do is to take and get a propane torch and start the car turn the propane on but leave the flame off and go over the vacuum lines with it seeing how it is a vacuum line when the propane passes over a leak the propane will get sucked in and you will here a change in rpm when you go over the leak