Knock Censor
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Joined: Feb 2002
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From: Portage Twp, PA
According to the '89 Ford shop manual, it's a couple inches in front of the oil filter. And as best as I could see on my '89 4.9L, that IS indeed where it is...it's just got a bunch of stuff in the way obscuring a clear view.
Pat
Pat
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Joined: Feb 2002
Posts: 636
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From: Portage Twp, PA
Found it and took a pic
Here's a pic (the best one I could take without removing the coil) of the knock sensor on my '89 300:
According to the '89 EVTM, page 38, it uses pin #23 on the EEC. And on page 133 of the same manual, it shows the location of the sensor as being between the coil and the distributor, below the lifter cover. The coil is directly to the left of the sensor in the above pic, and my hand is blocking the distributor. And in my previous post, I meant to say in front of the distributor, but had oil filter on the brain. Sorry 'bout that.
Hope that helps clear things up a little about knock sensors...at least for 300s in '89!
Pat
According to the '89 EVTM, page 38, it uses pin #23 on the EEC. And on page 133 of the same manual, it shows the location of the sensor as being between the coil and the distributor, below the lifter cover. The coil is directly to the left of the sensor in the above pic, and my hand is blocking the distributor. And in my previous post, I meant to say in front of the distributor, but had oil filter on the brain. Sorry 'bout that.
Hope that helps clear things up a little about knock sensors...at least for 300s in '89!
Pat
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From: Topsfield, MA
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So, now that I have established that I have a) a knock sensor, and, b) the 4.9L wrist pin knock, could that knock be fooling my sensor into backing off the timing? If I unplug the knock sensor to test, will I get a CEL?
Post Fiend
Joined: Nov 2001
Posts: 14,947
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From: Topsfield, MA
The knock sensor will detect unusual vibration.
I don't know what you've done do far but if you have a knock...pull 1 plug at a time to drop a cylinder and see if the knock stops...it'll help isolate the cylinder.
You may or may not get a CEL, if you do...so what....won't hurt anything.
When I say "not in many of them"...I mean by year not within the same year.
I don't know what you've done do far but if you have a knock...pull 1 plug at a time to drop a cylinder and see if the knock stops...it'll help isolate the cylinder.
You may or may not get a CEL, if you do...so what....won't hurt anything.
When I say "not in many of them"...I mean by year not within the same year.
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