Code 43 after engine install....
06-11-2001, 08:18 PM
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Code 43 after engine install....
I just put in my speed density 355 TPI with headers, new cam, adjustible fuel pressure regulator, custom PROM, and a few other minor things. Starts and runs, but I get code 43 (electronic spark control) from the check engine light. I haven't a clue as to where to start to fix it. Also, is this code affecting performance in any way at all? ANY help would be greatly appreciated. Thanks.
[This message has been edited by CamaroX84 (edited June 11, 2001).]
[This message has been edited by CamaroX84 (edited June 11, 2001).]
06-11-2001, 11:42 PM
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Car: yy wife, crazy.
Engine: 350, Vortecs, 650DP
Transmission: TH-350
Axle/Gears: 8.5", 3.42
Basically a code 43 means that the ECM isn't getting a signal from the ESC. That could be due to the knock sensor going bad or not having a good ground or connection, the ESC gone bad or not getting a good connection to the ECM, or the ECM is bad. The ECM will either advance the timing regardless of knock (bad for the engine), or it'll retard it, Killing performance.
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