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Old Jul 10, 2005 | 04:48 PM
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bomberchamp
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Knock Sensor?

Hey guys, I've got a 98 expedition with a 4.6 and it pings real bad on anything other than Super unleaded. The power and mileage has also dropped. We scanned it and the knock sensor came up as being bad. Question is where is this sensor and how hard is it to replace. Any info would be appreciated.
 
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Old Jul 10, 2005 | 11:22 PM
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Welcome to the forum.

It should be under the intake manifold. The intake manifold must be removed to replace it. I looks to be located between cylinders # 3&7. That's where it is on a 2000 model.

4 8
3 7
2 6
1 5

Front
 
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Old Jul 11, 2005 | 07:39 AM
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bomberchamp
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Thanks for the info, we were hoping it wasn't under the intake. Oh well I'll tackle it after we get back from vacation. Love the message board and again thanks for all the help.
 
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Old Jul 11, 2005 | 10:35 AM
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From: duncan oklahoma
see if you can reach it under the intake after taking the alternator off. it takes a 10 mm .
 
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