still getting knock sensor codes after replacement

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Jul 31, 2019 | 01:08 PM

Trevor57

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From: Chicago suburbs

still getting knock sensor codes after replacement

2003 5.3 all stock with 7875 turbo, and 80lb injectors. I got codes for both knock sensors, and replaced both sensors with oem, along with the harness. Upon replacement the codes show back up immediately. clear them, and they come right back. I have tested the sensors all the way up to the pcm, and they test as they should. I am getting no other codes. I am not sure if it is related, but the car seems to idle a little rough, and at about 800 rpm.

Jul 31, 2019 | 05:01 PM

LilJayV10

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what codes are you getting?

Jul 31, 2019 | 05:15 PM

Trevor57

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p0327 code. I am using the torque app, and I am getting knock counts. I don't really know how to interpret the info though. I did one wot pull and the count was at 150.

Jul 31, 2019 | 11:10 PM

LilJayV10

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Is this a new problem or have you been driving it for a while with no issue?

Aug 1, 2019 | 12:59 PM

aruss99

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Have you tried desensitizing the knock sensors after doing the turbo? Is your downpipe or any piping close to the frame?

Aug 1, 2019 | 08:24 PM

LilJayV10

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From: Evansville,IN

Quote:

Originally Posted by Trevor57

2003 5.3 all stock with 7875 turbo, and 80lb injectors. I got codes for both knock sensors, and replaced both sensors with oem, along with the harness. Upon replacement the codes show back up immediately. clear them, and they come right back. I have tested the sensors all the way up to the pcm, and they test as they should. I am getting no other codes. I am not sure if it is related, but the car seems to idle a little rough, and at about 800 rpm.

Read the thread. If they come back immediately there are other issues....