:-huh

I have an 1994 Ford Explorer with a pinging engine underload. I purchased a "Knock Senor" sending unit. Can anyone tell me where the old unit is located on my vehicle? Left or right facing engine, next to or close to what?

Thanks

 

Why do you think it's a bad knock sensor? Did you get a trouble code? Check out this link. Gotta love the simple method one guy came up with for decarboning the engine to cure pinging. www.glue.umd.edu/~singletn/web/pages/ping.html

 

Thanks for your response. I have try cleaning the MAF, couple of cups of warm water thru the vacuum system, disconnected the battery for awhile, new air filter, Lucas fuel ejector cleaner, and removed the shorting block for awhile and than put it back. Each item seemed to help. So I than bought a Knock Sensor per a friends recombination. I have not tried readying a code with the engine running yet. I would like to go ahead and replace the Knock Sensor since I now have one but I need to know of its location.


Thanks again

 

Autozone, Napa, or your "friendly neighborhood Ford dealer" should be able to pull this up in their computer & tell you the location. Give em a call.

 

I have a 94 also, and I didn't think that this truck had a knock sensor. I checked the autozone page, and while they have one that they will sell you, when you click the component location link, it says that there isn't one on this vehicle. If you find that your truck does have one, please be sure to post the location...

Thanks.

 

94 Explorer 4x4 XLT 120K miles. Similar pinging problem that has been covered here or on other 4.0L V6 related forums.

I don't do much car maintenance, but I took the Explorer to three different mechanics and after wasting a lot of time (and $$$), the pinging was getting worst and worst.

Then I found ford-trucks.com, and after reading a few of the messages and a visit to Autozone for a torx-20 bit and a can of carb cleaner ($5.33 tax included) Battery disconnected, clean the MAF and voila! the pinging is gone!!

By the way, I didn't want to bother too many people with stupid questions so I bought a used Haynes Repair manual on Amazon.com. It gave me some ideas to fix other stuff, but I was dissapointed with the pictures on the guide. Perhaps I should buy a Chilton's guide or better yet a Ford Repair CD, but those seem hard to come by, even on ebay.

I still want try tightening the lower manifold bolts and a TSB issued by Ford concerning ping/knock due to carbon buildup. Both seem pretty easy to do, I just don't know how to distinguish some of the parts; so I guess I'll have to bother somebody after all.

Maal139, You mentioned a few months ago a picture of the throttle body/canister purge line. Do you still have that picture? Could you e-mail it to me please?

Thanks.

 

You can find the Ford cd's on www.fixitcds.com.

 

No, I don't have the photo anymore, sorry. It is, however, very easy to find. The throttle body is at the end of the long black tube that runs from the passenger side front tire area to the center of the engine compartment. It is held onto the metal throttle body by a hose clamp. Towards the bottom of the throttle body is a vacum hose, maybe 1/4 inch outside diameter (just a point of reference - I didn't measure it). It is the only vacum hose on the throttle body. If you can't see it, just feel around under there with your hand and you will feel it. I hope that helps.

Matt

 

There is a link to the photo in this thread. It's on page 2 in a post by cowboybilly9mile.

https://www.ford-trucks.com/forums/s...hreadid=100739

Also, did you just spray the MAF sensor, or did you carefully scrub it? I sprayed it and the ping was still there. I very carefully scrubbed it with carb cleaner and an old toothbrush and that cleaned up the ping for me.

 

Thanks for the link to fixitcds.com. $16.99+shipping for a CD with all 1994 Ford Truck Repair Manuals, that's not too bad.

I just checked, I couldn't see it the hose (is 2:55 A.M. so is kind of dark out there) but I was able to feel it, good description! Good thing that you mentioned the other post by cowboybilly9mile, because he said there that the spark plugs will need to be replaced after decarboning; another trip to Autozone. I didn't scrub the MAF filaments, just sprayed them, and that took care of the pinging. I might try your toothbrush technique though.

Thanks guys,

Enrique

 

I changed the oil too.