09 Cobalt Lt Engine Knock (ecotec) - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
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post #1 of 21 (permalink) Old 02-27-2014, 05:44 PM Thread Starter
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09 Cobalt Lt Engine Knock (ecotec)

I have a 09 cobalt lt with the ecotec engine. The engine is missing and knocking pretty bad. It will only stay idling a couple minutes. It had codes 010 and 017 so I changed the cam position sensor and crankshaft position sensor with no change in engine function. Im curious if the engine misfiring can cause it to knock profusely or not and is there any special steps I should have took after the sensor changes. If anyone has any suggestions I would be very grateful. Thanks in advance.
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post #2 of 21 (permalink) Old 02-27-2014, 05:46 PM
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0010 I think is the solenoid, did you replace that?

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post #3 of 21 (permalink) Old 02-27-2014, 06:17 PM Thread Starter
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Im not real familiar with with all the sensors and locations. I replaced the cam sensor on the exhaust side on the rear of the engine and the crank sensor. Is the cam solenoid the two on top of engine on passenger side and can that possibly cause the engine to miss and knock. Thanks for posting.
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post #4 of 21 (permalink) Old 02-27-2014, 06:19 PM
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The solenoids are the two posts on the valve cover. One of those is your issue and yes it would cause knock. How much knock are you seeing?

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post #5 of 21 (permalink) Old 02-27-2014, 06:42 PM Thread Starter
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Its quite a bit. I even unhooked coil packs on each cylinder one at a time to see if there was any change in the knock to try and eliminate maybe a rod knock. No change in the sound of the knock. I havent changed either of the solenoids though. I have checked to make sure each cylinder was firing and I checked fuel pressure at the rail and all that was good. I changed the oil right off the bat also because I know it hadnt been changed in a while but there wasnt any debris in the oil or discoloration just really black. The filter was pretty nasty though. Are those solenoids something I can clean or just need to replace. I hope this info helps a little.
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post #6 of 21 (permalink) Old 02-27-2014, 06:48 PM
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Ohhhhhh youre talking about physical knock, not knock retard.... if youre hearing knock, odds are that its a spun bearing. Flakes in your oil?

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post #7 of 21 (permalink) Old 02-27-2014, 06:59 PM Thread Starter
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Not sure about what kind of knock it really is. Will that cause it not to idle. What is the easiest check for this method. I just know its knocking. There was nothing in the oil I checked it twice for any debris in the oil. I could probably tell more about the knock if I could get it to idle.
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post #8 of 21 (permalink) Old 02-27-2014, 07:01 PM
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What a piece of crap cars are now a days...
I want my older car back that has very little if any of this computer junk on it....totally useless computer junk...
Starting to not like buying such a new car....

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post #9 of 21 (permalink) Old 02-27-2014, 07:02 PM
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Id replace the solenoid, reset the ecu and see what it does

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post #10 of 21 (permalink) Old 02-27-2014, 07:12 PM Thread Starter
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Im with ya Megatron. Im not familiar with this computer stuff either. Should I replace one or both Banker? I appreciate the advice.
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