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07-17-2014, 08:42 PM | #1 |
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Intake cam fault codes
After changing the VCG on my E86 (N52), it idles roughly on startup until I give it a little gas. I get the following codes via Bavarian Technic: 2A82, 2A99 and 2F45. These are all related to the intake cam timing. The VCG change went pretty easily but I am left to wonder why there is no procedure for re-indexing the valvetronic motor. I suspect that these messages, as well as the rough idle, are the result of that worm gear not reindexing correctly to the gear on the cam driveshaft. Every thread that I read about the procedure says that this motor re-indexes itself after a couple of cycles but I have not had that experience as yet.
Is there any other step i can take before having a shop look at it? I have used a 4mm hex to rotate the worm gear shaft in both directions. It doesn't seem to affect this problem. I get no code for a valvetronic motor failure (is there one?). Is it safe to drive to the shop? TIA |
07-18-2014, 09:06 PM | #2 |
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Changing VCG has nothing to do with vanos and timing. I suggest you check if any plugs to sensor is loose when you did the work. Start with vano solenoid and CPS.
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07-18-2014, 11:39 PM | #3 |
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Rechecked everything this evening. All seems correct. After several more starts, the initial idle is getting smoother. It seems to run OK but there seems to be a slight hesitation when accelerating from a stop. I'll try a few more starts tomorrow and clear the codes to see if they come back.
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08-06-2014, 11:35 PM | #4 |
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Had Kais at Southbay Autohaus in Hawthorne, CA put it on their GT-1. Turns out that the intake VANOS solenoid needs to be replaced. Have both ordered. Great guy, great prices. Very knowledgeable.
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