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Idle and running rough

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Old Apr 13, 2010 | 09:12 PM
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Default Idle and running rough
Hello after new cam and lifter install after start up car idles rough and feels like not hitting on all cylinders.Pulled codes it was po0336 so i replaced the crankshaft position sensor still the same and car wants to die after i accelerate and let off. what could be the problem?
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Old Apr 13, 2010 | 09:17 PM
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Originally Posted by kuzmfly1
Hello after new cam and lifter install after start up car idles rough and feels like not hitting on all cylinders.Pulled codes it was po0336 so i replaced the crankshaft position sensor still the same and car wants to die after i accelerate and let off. what could be the problem?
Is the code gone after the sensor change? Did you inspect the harness to the sensor itself?
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Old Apr 13, 2010 | 09:17 PM
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Stock cam? Are you sure you got the cam chain/gears aligned exactly right and not off a tooth?
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Old Apr 14, 2010 | 01:02 AM
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The code came back, yes I checked out harness.I replaced same cam that was in there and it was not stock. Yes I had timing marks lined up. Could I maybe have rockers not set right? And valves are off
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Old Apr 14, 2010 | 01:12 AM
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Originally Posted by kuzmfly1
The code came back, yes I checked out harness.I replaced same cam that was in there and it was not stock. Yes I had timing marks lined up. Could I maybe have rockers not set right? And valves are off
So the P0336 came back.
Not too many options here. You replaced the sensor, so that leaves the wiring, and the PCM.....Of course a damaged reluctor wheel can cause a similar issue, but since the motor has not been apart, I would find this remote at best.

Rockers are hard to mess up......provided you followed the installation procedure, and they are torqued properly.
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Old Apr 15, 2010 | 01:52 PM
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Hello I replaced sensor and code came back and car still runs rough
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Old Apr 15, 2010 | 01:55 PM
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Originally Posted by kuzmfly1
Hello I replaced sensor and code came back and car still runs rough
did you read post #5?
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Old Apr 15, 2010 | 02:15 PM
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Yes is there any way to check PCM ? Wires are ok
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Old Apr 15, 2010 | 02:18 PM
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Originally Posted by kuzmfly1
Yes is there any way to check PCM ? Wires are ok
Just so I understand correctly. You disconnected the connector from the PCM, and disconnected the connector from the crankshaft sensor, and check the three wires' resistance value, for shorting to each other, opens, etc ?
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