View Full Version : What is this sensor?

09-01-2007, 12:46 PM
I just broke the sensor off the fitting below the pass. side exhaust manifold. I'm trying to identify it so I can replace it. The fitting is huge and screws into the block above the oil pan below the exhaust manifold on the pass. side. I have a factory shop manual but haven't run across this sensor yet in an description. The car is a 1993 SC w/AOD. Thanks.

09-01-2007, 12:53 PM
Sounds like the knock sensor. Dose it have a little heat sheild above it? If so that it.

09-01-2007, 03:31 PM
That would be the one, thanks! It has a cylinder shaped shield on it. Is that shield really necessary? Kinda gets in the way at times.

09-01-2007, 03:36 PM
The knock sensor pulls timing out if a the cylinders are getting too hot to prevent detonation. I won't recommend you leaving it out, but I left it off of my car.

It really depends what mods you do or don't have to your car.

09-01-2007, 03:38 PM
A little info from a previous post.



09-01-2007, 05:02 PM
Thanks for the info. I know what the sensor does, just was curious if the shield was really necessary, guess I'll be putting that back on too.

Joisey Jim
09-03-2007, 01:17 PM
I'd definitely put that heat shield back (facing upwards) as anything plastic near the manifold is going to melt.

09-03-2007, 01:35 PM
I broke mine when i was pulling my engine too... Took me a bit to figure out what it was but i got one at Orielly for $30

09-03-2007, 01:38 PM
Just make extra sure you have right part # as this would effect your performance.