The duty cycle is 97%.. I can adjust the tower, but it does not change.. It also does not change when I rev it up..Any ideas where to go from here?? I would love to fix it myself, but I hate to keep driving it with it running this rich.. I saw a 10% number flash for a moment, but it may have been a breif bad connection... Thanks, Jay

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89 300SEL Money Pit

92 Blown Buick Ultra Pimpmobile 220K and adding 1K per week

88 Wagoneer Slightly modified (Not for soccer moms)

04 Kia Sedona with every option... NICE

Try unplugging the O2 sensor and see what it goes to. IF it is fixed at 50%, you have a bad O2

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Benzmac:
Donnie Drummonds
ASE CERTIFIED MASTER AUTO TECHNICIAN
MERCEDES SPECIALIST 11 YRS

I have a new O2 sensor, however it wasn't specifically made for my car(that doesn't mean it's good)..I bought a sensor for a 90 302 Mustang.. The connector was already missing, as somone before me had hardwired one in already.. I don't know why they cut the wires before the connector..

There are two whites, and a black wire.. I know that the two whites are for the heater, and the black is signal..

Should both white wires be +12V?? With the ignition on, or is one of them ground.. I want to make sure the wires are actually OK too???
I won't get a chance to do any further testing until Saturday morning.

I'm pretty sure I can fix this if I can collect enough info. At some point, time becomes a factor though..
I've got until Sunday to fix it.. Then it goes in the shop, I bite the bullet, and get on with my life..

Thanks for the help