Enlighten me on TSB 04-20-6
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Fleet Mechanic
Joined: Jul 2010
Posts: 1,354
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From: Winnipeg
Enlighten me on TSB 04-20-6
04-20-6***TICKING OR KNOCKING NOISE COMING FROM THE CATALYTIC CONVERTERS
My 02 F150 5.4 4x4 appears to be one of those "Some" vehicles that makes the diesel/knock noise from the cat conv area. My brothers 03 5.4 doesn't; my friend's 02 4.6 doesn't. Other than using Ford's $400 cat converter wrap, I'm wondering if changing the exhaust manifolds out possibly even to headers, might change the impulse. Maybe only trying a junk yard cat converter/pipe assy will get rid of the knock/ticking noise.
Anyone else have or solved this problem?
My 02 F150 5.4 4x4 appears to be one of those "Some" vehicles that makes the diesel/knock noise from the cat conv area. My brothers 03 5.4 doesn't; my friend's 02 4.6 doesn't. Other than using Ford's $400 cat converter wrap, I'm wondering if changing the exhaust manifolds out possibly even to headers, might change the impulse. Maybe only trying a junk yard cat converter/pipe assy will get rid of the knock/ticking noise.
Anyone else have or solved this problem?
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