Trouble codes

[KY953.oh]

My 95, 3.0 is throwing #14 (ignition reference signal-no signal), #21 (heated oxygen sensor-front circuit) and #52 (knock sensor circuit). My problem is, after motor gets up to running temperature the check engine light comes on and power is cut by half and runs really sluggish. When CEL is off it runs like a racecar. My guess is it has to do with 02 sensors. Where are the front ones located? And, where is the knock sensor located? Thanks in advance for any help.

 

[dogojoe96]

Take a look under the driver side and you should see the o2 sensor before the cat. I'm 99% sure that there is only one o2 sensor on the 3.0 . I've only ever seen the one in all that I've done to mine. I believe the knock sensor is under the intake on the driver side as well. I have not had to replace mine so I'm not too sure.

 

[KidVermicious]

The O2 sensor code is likely affecting your open loop/closed loop state, but what's cutting your power is the knock sensor code. It thinks you're pinging and is drastically retarding the timing to try and compensate.

You may or may not be actually pinging. The knock sensor harness is known to get brittle and break on your motor. I'd check your timing first because it's easy, then check the harness pigtail, then replace the sensor. If you do all that and you still get the code, THEN worry.

 

[KY953.oh]

I'll check these things out. Thanx guys