help with sensors.......
Thread Starter
Burning Brakes
Joined: Dec 2003
Posts: 773
Likes: 0
From: amherstdale wv
help with sensors.......
is it possible to test the 02 sensors and the knock sensors with the car in the on position (not running) and if so what voltage should i get for the 2 sensors an what should i set my digital meter on, ohms ???
thanks for helpin guys ??
:cheers:
thanks for helpin guys ??
:cheers:
Team Owner
Joined: Mar 2001
Posts: 54,124
Likes: 30
From: Cincinnati, Oh USA
Re: help with sensors....... (GhosTRydeR_92)
The knock sensor is like a microphone and only puts out a voltage when knock occurs in the cylinders. Without the engine running, the knock sensor has no output and cannot be told if it is defective or not. The O2 sensor puts out a voltage, 0.1 volts high oxygen (lean) to 0.9 volts low oxygen (rich). A 10 megohm per volt or higher voltmeter is required to make the measurement. The O2 sensor needs to above 400 F before an accurate measurement can be made and codes are set if the sensor is open circuit or puts out a voltage outside of 0.1 to 0.9 volts.
Team Owner
Joined: Sep 2003
Posts: 25,295
Likes: 4
From: I'm the walkin dude I can see all of the world...
St. Jude Donor '03
Re: help with sensors....... (dwestsr)
One way to test the knock sensor is to hook up a timing light and have someone tap lightly on the blockwith a small hammer and see if the timing retards
Or you could get a scanner. :yesnod:
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Melting Slicks
Joined: Apr 2002
Posts: 2,118
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From: St. Charles, MO Route 66 Corvette Club
Re: help with sensors....... (GhosTRydeR_92)
I think it would help!!! You can buy a little wiring adaptor at MAD that allows you to test the O2, but the engine has to be running. :)
SAM
SAM
Thread Starter
Burning Brakes
Joined: Dec 2003
Posts: 773
Likes: 0
From: amherstdale wv
Re: help with sensors....... (Sam Lam)
I think it would help!!! You can buy a little wiring adaptor at MAD that allows you to test the O2, but the engine has to be running. :)
SAM
SAM