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Old 10-28-2004, 01:59 PM
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knock sensor

is there anyway to be able to run my 87 camaro without a knock sensor?

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Old 10-28-2004, 02:22 PM
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Not if you keep the computer active.
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Old 10-28-2004, 03:21 PM
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Simply unplug it. The computer will run without it. Its a reactive sensor. The engine simply wont retard sparking if knock occurs. Many people unplug them when running timing gears. You risk damage of detonation however if your timing and fuel are correct this shouldn't be a problem.

I dont run it on mine currently.
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Old 10-28-2004, 05:54 PM
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ok well here is the deal i am throwing a 43 esc code and my car will not run right and i thought it was because of the knock sensor not being hooked up but since you say that i guess i have another problem.
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Old 10-28-2004, 06:54 PM
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It most likely a problem with the Electronic Spark Control module rather than the knock sensor.

Taken from a GM site.

"ESC is used to sense spark knock (pinging) and retard the timing to eliminate it. A knock sensor (located at the rear of the engine block) sends signals to an ESC module which then signals the ECM that knocking is being detected. The ECM will retard the timing by as much as 20 degrees in 1 degree increments. A loss of knock sensor signal or loss of ground at the ESC module will cause the signal at the ECM to remain high. The ECM will act as if no knock is present, and may possibly result in engine damage, if there is detonation."

If you have a fault between the ESC and the ECM it THAT will cause the timing to begin its retard process and now allow proper timing advance.
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Old 10-28-2004, 08:03 PM
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so is their is a wire grounding out or there is a wire that needs to be grounded?
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Old 10-28-2004, 08:33 PM
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Possibly something is grounded that shouldn't be. Or its highly possible the ESC unit is bad. If you havent changed the wiring I would suspect that first as I have seen them go bad.
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Old 10-29-2004, 04:26 AM
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i just replaced the esc and it didnt change anything so what else should i look for?
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Old 10-29-2004, 05:08 AM
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Try changing the knock sensor right in front of the starter in the lower part of the block , it will be screwed into the block drain, most are on the V8 GMs and check the wire that connects to it it will burn and short out on the exhaust manifold i think it is brown?or gray?. Check your plug wires bad or leaking wires will set this code and must be routed away from the sensor wire, check your repair manual. And you need to reset the computer to remove old codes , disconnect the battery for ten seconds or so, each time you change a part or repair or you will be reading the same code set the first time.

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Old 10-29-2004, 12:41 PM
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would that brown or gray wire run into one of the connectors that go to the distributor?
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Old 10-29-2004, 02:00 PM
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