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    Thread: Cam position sensor or Engine speed sensor?

    1. Member BIG DUB's Avatar
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      05-22-2012 04:27 PM #1
      I took the car out for a little spin about 8 miles. We where about .5 of a mile from the house and there is a section where you have to stop on a little bit of a hill. I stalled the car due to the new Dm clutch then headed to the house and the car started to run like crap. I hooked up VAGCOM and had this code:
      17748.P1340 camshaft position sensor-G40/ Engine speed sensor-G28: incorrect allocation(#1)

      I swapped out the 2 cam position sensors and cleared the code and started the car and it still ran like crap. I just happen to have a new Cam position sensor(hall sensor) so I swapped it out in both cam positions one at a time and cleared the code and the car still runs like crap.

      Is there a way to check(test) with vagcom to see if its one of the engine speed sensors?

      Last edited by BIG DUB; 05-25-2012 at 07:22 PM.

    2. Member fouckhest's Avatar
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      05-22-2012 04:36 PM #2
      typically if an ESS is bad you wont be able to start the car...now granded i have only dealt with this on 1.8t's...but the tell tell sign if an ESS is bad is that when you crank the car over the tach will not move....

      you had the head off didnt you? are you sure that your not off a tooth on the timing? i know several people who have played hell with timing 24v VRs....

      good luck mate!

    3. Member haf1zur's Avatar
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      05-22-2012 04:53 PM #3
      G40 is the camshaft position sensor towards the front of the engine

      Is it loose?

      Do you get the same error when the cable is disconnected from the connector?
      Last edited by haf1zur; 05-22-2012 at 04:57 PM.

    4. Member BIG DUB's Avatar
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      05-22-2012 06:34 PM #4
      Quote Originally Posted by haf1zur View Post
      G40 is the camshaft position sensor towards the front of the engine

      Is it loose?

      Do you get the same error when the cable is disconnected from the connector?
      No its not loose, I know that was a common problem: the sensors getting loose.

      the car runs like crap either way..

      Runs rich and idles like crap and vaccum is only-2 or so

    5. 05-22-2012 06:44 PM #5
      Quote Originally Posted by BIG DUB View Post
      No its not loose, I know that was a common problem: the sensors getting loose.

      the car runs like crap either way..

      Runs rich and idles like crap and vaccum is only-2 or so
      tooth out on the timing...or you have a bad chain tensioner in the back of the head....
      MK4 R36 x Precision 6776 Turbo = Large Grin

    6. Member BIG DUB's Avatar
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      05-22-2012 10:05 PM #6
      Quote Originally Posted by Slapbladder View Post
      tooth out on the timing...or you have a bad chain tensioner in the back of the head....
      I replaced the chains and tensioner and sliders. I removed the valve cover and the chain is tight as can be and everything else looks good.

      I'll check TDC on # 1 tomorrow when i get home from work. And I have never seem a car with chains jump a tooth. Now a worn belt is different.

      I'll try to test the speed sensors..

      Thanks again for all the help.

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      05-22-2012 10:31 PM #7
      So, you replaced the chains. did you time the intermediate gear correctly?

    8. Member BIG DUB's Avatar
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      05-22-2012 10:40 PM #8
      Quote Originally Posted by Arizman3 View Post
      So, you replaced the chains. did you time the intermediate gear correctly?
      Its a fresh 3.3 forged motor built by RAI motorsports. I did not personally check the intermediate gear. I did check the timing,tensioner,guides before i installed the valve cover.
      Last edited by BIG DUB; 05-25-2012 at 07:23 PM.

    9. Member BIG DUB's Avatar
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      05-23-2012 09:50 PM #9
      So I removed the valve cover and coilpacks and plugs, and set the motor to TDC on the #1 Cylinder. Now keep in mind that I run a the Nuespeed aftermarket crank pulley, but when I installed it I put a paint marker spot on it so I could time the crank.

      I don't have the cam timing tool so i used a ruler and it slide it pretty easy when I got the motor timed and then I checked the chain rollers between the cam timing marks and got 16 but the marks dont line up properly

      Is it possible that the chain is to tight with the new tensioner and guides? I have heard of this problem with guys running head spacers-But I am not running one but the chain seems to be super tight?





      Last edited by BIG DUB; 05-25-2012 at 07:24 PM.

    10. Member spitfire481's Avatar
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      05-23-2012 11:07 PM #10
      jay, did you rotate both cam adjustment sprockets before setting the timing? if i remember correctly both need to be rotated towards the firewall until they stop, then you can continue setting the upper timing, 16 rollers, etc. its been a few years since i put my cams in but i did remember rotating the sprocket

    11. Member spitfire481's Avatar
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      05-23-2012 11:09 PM #11
      found the pic i used when i did it


    12. Member BIG DUB's Avatar
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      05-23-2012 11:11 PM #12
      I'm not sure Bro RAI timed it, I'm looking at redoing everything soon to make sure its in time.

    13. Member spitfire481's Avatar
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      05-23-2012 11:21 PM #13
      Quote Originally Posted by BIG DUB View Post
      I'm not sure Bro RAI timed it, I'm looking at redoing everything soon to make sure its in time.
      hit me up if you do, ill come over and hang out and look it over with you. a second look never hurts

    14. Member BIG DUB's Avatar
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      05-23-2012 11:26 PM #14
      i may knock it out tomorrow or Friday. Cheers Bro

    15. Member BOUDAH's Avatar
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      05-23-2012 11:34 PM #15
      Quote Originally Posted by BIG DUB View Post
      i may knock it out tomorrow or Friday. Cheers Bro
      remember to check for the oil rings
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    16. Member BIG DUB's Avatar
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      05-24-2012 06:16 PM #16
      Quote Originally Posted by BOUDAH View Post
      remember to check for the oil rings
      Will do

    17. Member BIG DUB's Avatar
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      05-24-2012 07:02 PM #17
      Is there a way to check the engine speed sensors with vagcom

    18. Senior Member PowerDubs's Avatar
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      05-25-2012 12:49 PM #18
      Out of time. Off a tooth. Do over. Very common.


      Also, the oil you mentioned on your PM is very common on a newly rebuilt engine until everything wears together and seals up. Problem is, many bored motors never seal right ever again.


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    19. Banned ThatVdub's Avatar
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      05-25-2012 01:10 PM #19
      i see u have a bentley, did u follow EVERY step to the T, obviously not.
      not to be rude, but you should not do a job like that without doing everything precisely.
      do every step, not just tdc and cam orientation.

    20. Member BIG DUB's Avatar
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      05-25-2012 01:14 PM #20
      Quote Originally Posted by ThatVdub View Post
      i see u have a bentley, did u follow EVERY step to the T, obviously not.
      not to be rude, but you should not do a job like that without doing everything precisely.
      do every step, not just tdc and cam orientation.
      Thanks for your input... No i didnt time the motor a paid a shop to do it and its a tooth off so im retiming everything, now..

    21. Banned ThatVdub's Avatar
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      05-25-2012 01:28 PM #21
      Quote Originally Posted by BIG DUB View Post
      No i didnt time the motor a paid a shop to do it..
      Damn! Well, at least it will be corrected.

    22. Member spitfire481's Avatar
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      05-25-2012 01:30 PM #22
      the reason i trust no shop...

    23. Member BIG DUB's Avatar
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      05-25-2012 01:31 PM #23
      Well i was new to the area and didnt have all my tools at the time. I'll get it figured out.

    24. Member spitfire481's Avatar
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      05-25-2012 01:36 PM #24
      Quote Originally Posted by BIG DUB View Post
      Well i was new to the area and didnt have all my tools at the time. I'll get it figured out.
      yea i know. i wish i knew of somewhere better that i could have referred you to but i try to avoid shops in general, so i dont really know who is good and who is not

    25. Member BOUDAH's Avatar
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      05-25-2012 02:55 PM #25
      I like NGP but they are a tad pricy.
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    26. Member BIG DUB's Avatar
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      05-25-2012 03:31 PM #26
      Quote Originally Posted by BOUDAH View Post
      remember to check for the oil rings
      Oil rings are installed boss

    27. Member BOUDAH's Avatar
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      05-25-2012 05:17 PM #27
      Quote Originally Posted by BIG DUB View Post
      Oil rings are installed boss
      Huh ok
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    28. Member BIG DUB's Avatar
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      05-25-2012 07:26 PM #28
      Rai is coming to get the car and redo the timing.

    29. Member BOUDAH's Avatar
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      05-26-2012 12:20 PM #29
      Cool cool
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