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Thread: CAS keeps dying

  1. #1
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    Default CAS keeps dying

    About a year ago I had to replace my CAS because my car died in the middle of an intersection. It went really well for 10 months but then it died again. I replaces the CAS again and this time it only lasted 2 months before dying. Does anyone have any clues as to why my CAS would be dying so often? I can't afford to keep buying these things let alone be put in dangerous situations when it decides to die.

    Any help would be appreciated.

    Cheers!

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    where are you getting your CAS from as I have heard of stories witht he ones off ebay being crap and fail quickly

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    Did you replace the balancer as well. It's always better to do both.
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    As aluded to above, sensors such as this I would stick with genuine GM. Yes they may cost a little more upfront, but most times have a far greater lifespan than some non-genuine items. What brand have you fitted?
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    I don't believe that the CAS's are genuine GM but they were purchased from Burson. I didn't replace the harmonic balancer either as I wasn't aware that I had to???
    Any more ideas guys/gals?

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    Not saying this is the case with yours, but my CAS had a bad connection, so I used some WD-40 of all things on the connector and the problem went away....

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    If the fins on the balancer are bend just a little it scrubs the CAS until it dies. The CAS needs to be "gap'd" properly when fitting a new one.
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    Quote Originally Posted by Dannal View Post
    I don't believe that the CAS's are genuine GM but they were purchased from Burson.
    Was it a *cough* ACA brand?

    As above, for a few extra dollars go genuine.
    If I told you I was a compulsive liar, would you believe me?

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    I think a genuine CAS is the right way to go as well as cleaning the connectors and replacing the harmonic balancer.

    Cheers!

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    Why replace the balancer if there's nothing wrong with it? Waste of money IMO. I done plenty of CAS's and not once changed the balancer.
    Quote Originally Posted by hakhawk View Post
    there are more pressing issues on the site, like choosing between vl's and potatos.


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    Quote Originally Posted by Hangman View Post
    Why replace the balancer if there's nothing wrong with it? Waste of money IMO. I done plenty of CAS's and not once changed the balancer.
    And I quote;
    If the fins on the balancer are bend just a little it scrubs the CAS until it dies. The CAS needs to be "gap'd" properly when fitting a new one.
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    Doesn't mention changing the balancer...

    You can see if the fins line up in the CAS by looking down behind the balancer as you put it on. That's how I've always done it, and never had an issue.
    Quote Originally Posted by hakhawk View Post
    there are more pressing issues on the site, like choosing between vl's and potatos.


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    Is the car question running dual fuel ? maybe a voltage feedback to the CAS from the LPG wiring ???

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    Quote Originally Posted by Hangman View Post
    Doesn't mention changing the balancer...

    You can see if the fins line up in the CAS by looking down behind the balancer as you put it on. That's how I've always done it, and never had an issue.
    Most of the time I have noticed when the CAS goes the balancer it's self looks pretty ordinary. But whatever works for you.
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    The only adjustable CAS's were fitted to the VN V6 and early VP V6's up until the 26th october 1992. After this date, the CAS was non adjustable, as the timing case now had locating pins to properly align and position the CAS.
    Id be checking that theres no scrape marks etc on the faulty CAS or on any of the balancers interruptor blades that pass through the CAS. Ive ran into a few problems with cheaper, non genuine CAS's failing, even from brand new. So save yourself some money in the long run, and only use genuine holden sensors.

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    UPDATE:
    I purchased a genuine CAS from Holden this morning and fitted it. I also checked the Harmonic Balancer and cleaned everything including the connector. I was driving around all day and it ran beautifully. When I went to leave town tonight it died again! This leads me to one of two possible conclusions:
    1. It was not the CAS this time. 2. Something is causing the CAS to die.
    Any more ideas please? I am so close to buying a pack of marshmallows and roasting the POS.

    Cheers!

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    The fuel pump can cause it to die...

    WHen it dies does it start again with no problem? normally a faulty CAS would need to cool down before it will start again.

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    Quote Originally Posted by Dannal View Post
    UPDATE:
    I purchased a genuine CAS from Holden this morning and fitted it. I also checked the Harmonic Balancer and cleaned everything including the connector. I was driving around all day and it ran beautifully. When I went to leave town tonight it died again! This leads me to one of two possible conclusions:
    1. It was not the CAS this time. 2. Something is causing the CAS to die.
    Any more ideas please? I am so close to buying a pack of marshmallows and roasting the POS.

    Cheers!
    The stalling issues on the VN/VP's can be several things. CAS, DFI, Coils, ECU or the connectors in between. Check the DFI connector and close al lthe pins a little so they are a snug fit. Get a replacement know good ECU and run that for a few days.

    Several years ago the 88 wagon had this stalling issue and in the end I just drove around with the lap top connected waiting for it to die and when it did 3 days later I caught it on the laptop data. Put all the numbers into a spreadsheet/graph and it was the ECU calling for the A/C fan that killed the engine. basicly the ECU flat lined the car at this point. Replaced the ECU and (having replaced all the other possible dud items like the list above) and away it went.

    1 thing to try is to wriggle all the wires and connectors while the car is running - like at the ECU and DFI - see if you can get it to stall that way. If that fauils to kill the spark - next is DFI unit or the ECU o nthe list on most probably.
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  20. #20
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    I believe that I can rule out the fuel pump (replaced 10 months ago) and the CAS (replaced a few days ago) and the Harmonic Balancer looks ok. What does that leave me as being the cause? Maybe the DFI module, the wiring or something else??? Finding a competent mechanic who is also honest is not easy where I am so I would really love to be able to get this sorted out myself.


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