I've posted in another thread or two about engine knocking that I've been having since the summer.
I have a '10 Sahara.
When I brought my Jeep in for its most recent oil change, about a month ago, I asked that they check it out to see if they can figure out what's going on.
I'm not sure if they needed to drive the Jeep to hear the knocking, but the mileage was the same when I got it back as when I dropped it off, so I'm convinced they didn't even check it out.
The service guy told me to put higher octane fuel in.
Earlier this week I called the service dept. back because I wanted to have them really look at it, again, the guy tells me that it's a common problem and Chrysler sent a bulletin...then he changed his words....'is saying' to put higher octane fuel in.
So I ask if one tank will fix the issue or will it require multiple tanks....he's not sure.
Great....I should have asked for him to give me that in writing and see what he said then.
I've been doing as much research on the issue as I can via Google, and a little on here.
As most of you on here know, the knocking can be happening for a number of reasons.
I found something online about testing the knock sensor:
^ Defective Knock Sensor: The knock sensor responds to frequency vibrations produced by detonation (typically 6 - 8 kHz), and signals the computer to momentarily retard ignition timing until detonation stops. A knock sensor can usually be tested by rapping a wrench on the manifold near the sensor (never hit the sensor itself). If there is no timing retard, the sensor may be defective.
OK, that's something I can do myself, BUT.....one thing I havent been able to find yet is where the knock sensor is located (I'd just like to know where it is) and does 'no timing retard' mean that when I hit the manifold while the Jeep is idle I should hear knocking?? If I don't hear knocking then the sensor is defective, correct?
Or could it really be a fuel issue?
SORRY for the long post, I just wanted to make sure I provided as much info as I could!!
Thanks in advance!!!