Replaced supercharger now hesitation and code 41 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 03-08-2007, 08:41 PM   #1
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Default Replaced supercharger now hesitation and code 41

Hello all,
Any help would be appreciated. I put a new supercharger on the car. I bought the car used and the old one I found out was gutted of the rotors. So I never had boost before. Someone deserves an *** kickin there. Anyway now I have hesitation in the engine at low RPMs. Ran the codes and got code 41.
Thanks, Jon
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Old 03-08-2007, 08:45 PM   #2
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Please post your year, and trim level in your signature. Otherwise we have no idea what year you have.
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Old 03-08-2007, 08:47 PM   #3
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Thanks, Just did that.
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Old 03-08-2007, 09:09 PM   #4
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Code 41 is unrelated to your SC. It'* a cam sensor or interruptor magnet on the cam gear. All the definitions are in Techinfo for you.
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Old 03-08-2007, 10:46 PM   #5
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Would a bad cam sensor cause it to hesitate on take off? I was under the assumption that if the cam sensor goes bad it just reads the previous stored fuel level from memory.
Thanks,
Jon
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Old 03-08-2007, 10:50 PM   #6
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Fuel and timing go to limp mode. Retarded in both cases. You will be down at least 20% in power.
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Old 03-08-2007, 10:52 PM   #7
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The cam sensor doesn't have anything to do with fuel level. It helps the PCM determine injector and/or spark timing. So yeah, it will affect take off.

The sensor is easy to change, the magnet is not. Usually it'* the magnet is the problem. It breaks free of the cam gear. If you pull the sensor, you can turn the engine with a large wrench on the crank pulley bolt and peer through the sensor hole in the timing cover until you see a large nub (magnet) on the cam gear or a hole. Hope for a nub.
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Old 03-08-2007, 11:13 PM   #8
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Does the cam have to be removed to replace the magnet?
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Old 03-08-2007, 11:20 PM   #9
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No. You have to remove the torque-axis mount, water pump, and timing chain cover. While you're in there, replace the water pump due to age, and replace the timing gears and chain for the same reason. You're probably losing 5-10 horsepower from age alone.
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Old 03-08-2007, 11:29 PM   #10
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Hopefully I dont have to go that far though. I will change the CAM sensor and take a look in there tomorrow.
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