What is theit common problem for Code 43 on a 94 gmc sierra half ton 4wd 350?
Sep 16, 2012 at 4:28 PM
code 43
1994 GMC SIERRA
KRISTINVANVALKENBURG
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What is the** oops
Sep 16, 2012 at 4:35 PM
it is a knock sensor issue. it could be the wiring, connector or the sensor itself.
if you have a scan tool, monitor the timing and then tap on the top of the motor with a hammer and it should retard 4 degrees.
Roy
if you have a scan tool, monitor the timing and then tap on the top of the motor with a hammer and it should retard 4 degrees.
Roy
Sep 16, 2012 at 4:47 PM
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Knock sensor is new, would the diagnostic test read a bad knock sensor? Like show up as knock sensor?
Sep 16, 2012 at 4:55 PM
Its already retarding at 4degrees too
Sep 16, 2012 at 4:56 PM
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a code number never identifies a bad part, just a failed system.
if the timing is 4 retarded, disconnect the sensor and see if it advances to where it should be.
Roy
if the timing is 4 retarded, disconnect the sensor and see if it advances to where it should be.
Roy
Sep 16, 2012 at 5:08 PM
Where should it be?
Sep 16, 2012 at 5:20 PM
It came to a steady 4 degrees , then i pressed the gas and it jumped again ffrom 4 to 2 to 3 to 4
Sep 16, 2012 at 5:21 PM
how did you know is was 4 degrees retarded if you dont know where it should be??
4 degrees before top dead center is the spec.
Roy
4 degrees before top dead center is the spec.
Roy
Sep 16, 2012 at 5:22 PM
Its just stopped at zero
Sep 16, 2012 at 5:24 PM
how did you check the timing and when did you check it??
Roy
Roy
Sep 16, 2012 at 5:26 PM
The diagnostic tester said it was at 4degrees, is that not what you meant?
Top dead center?
Top dead center?
Sep 16, 2012 at 5:27 PM
I didnt chk the timing? Im doin what the computers tellin me to do
Sep 16, 2012 at 5:29 PM
The sticker on my truck under the hood says 0degrees
Sep 16, 2012 at 5:50 PM
do you have a timing light to check it??
Roy
Roy
Sep 16, 2012 at 6:06 PM