code 43 esc control circuit problem

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From: bifatmintor4sr@gmail.com
Date: 6/21/2006
Time: 6:47:50 PM
Remote Name: 64.72.112.14

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From: precision auto service
Date: 24 Jan 2002
Time: 15:22:17
Remote Name: 216.232.120.204

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Hi Dave Its louie here with our life long project c1500. truck is running relatively good but we are having a problem with intermitant code 43. I have gone through the alldata diagnostics and it tests out fine I hooked up the vantage dual screen to the esc signal line 485 at the ecm and also to the knock signal at the esc module and test drove vehicle. this vehicle is very hard to make ping and this code was alot more frequent until I advanced timing to 10 deg now hesitation is gone and code is less frequent. My readings are 9.30 volts on the esc line and I am getting a knock signal at the ecm. When the code set on me after about two hours of driving it set when I left a stop sign with light acceleration the code set I pushed hold on the vantage and looked at the scanner and it did not show a knock. The criteria for the code is to see a low esc signal for more than 5 seconds. There was no spark knock or voltage drop when code was set Now I am told by the GM guys that there should be twelve volts on the signal line and I have 9.3 . Can you or anyone tell me if that is correct or if my 9.3 is okay any other info would be very much appreciated. thankyou in advance.