It can cause several things to go nuts, besides bad mileage. The Ford wiring system seems to be a little less sensitive than most, been running around for 2 years with a bad one on a F150 V6 I drive.
Had a Chrysler minivan, the dealer convinced me it was a bad transmission, 2 weeks later did the same thing, ended up being one of the sensors.
The Jeep Cherokee suddenly ran like crap, wouldn't idle or accelerate, smutted all the plugs, had to change 2 sensors to fix the problem.
Try to remember what the code number was or the defining sensor, you should have 4 on that thing, some are a booger to get to and some are in the open easily accessed.
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'75 Cuddy with '00 Johnson Ocean Pro 150 horse
Benny
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