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  • [Corsa B 1993-2000] Corsa B fault codes

    Car has been running fine all winter throwing no fault codes. However, last summer I experienced some stuttering/misfiring and EGR-valve faultcode was present.This went on for a while, then stopped after I blanked off the EGR. Some times I would also get fault code 43 Primary ignition (distributor systems) High voltage.Problem is,-there is no distributor on this engine. It has a coilpack.Diagnose contact is the 16-pin type.I'm at my wits end here regarding which fault code list applies to my Corsa.

  • #2
    What year and engine is it?
    1972 Viva restoration thread - http://www.thecorsa.co.uk/projects-b....html#post1534

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    • #3
      Originally posted by Taurus View Post
      What year and engine is it?
      1997 - X12SZpicture here: [url="[url]http://s1103.photobucket.com/user/ChrisyNeill/media/DSCF0120.jpg.htmlThis"]http://s1103.photobucket.com/user/Ch...0.jpg.htmlThis site: Topbuzz Web Site - Technical Information - ECU Fault Codes @ www.topbuzz.co.uk has lots of faultcode lists, and looking up the list for Corsa B and the X12SZ-engine shows a list with the faultcode I've mentioned before that states code 43 to be ignition/distributor related. Other lists state code 43 and 47 to be EGR-related, and when fiddling around with the EGR-valve last summer code 43 and 47 would pop up. The Haynes manual however, doesn't mention code 43 at all.I'm a bit obsessed with getting the correct list to properly diagnose the engine instead of throwing parts at it. The fault code system is after all there for a reason, and is of great help provided one has the correct list.

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      • #4
        Ah - I remember this issue. You're not the first to have this issue. The problem is that in 97 Vauxhall were changing specifications on engines so quickly that things can get 'interesting'. When these engines were more common this was quite a frequent issue.

        So far as I can recall the DIS module should throw a 41 or 42 depending which circuit was playing up. The DIS system works on the wasted spark basis - ie it fires 1&4 and 2&3 at the same time. One cylinder is on a TDC ignition stroke, the other on exhaust. It's simpler with fewer moving parts. But there is still a primary and secondary circuit and the DIS is both the coil and in effect the distributor.

        When 43 came up on those the usual cause, if I remember right, was that it was actually an EGR issue. A blanked EGR can still throw a code - though to be honest I don't think I ever found the full explanation why it threw 43 in those circumstances.

        My hunch would be that if it's running OK then ignore it. If there are problems check the EGR blanking isn't leaking. I know people who got it replaced the DIS module and found it made no difference.
        1972 Viva restoration thread - http://www.thecorsa.co.uk/projects-b....html#post1534

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        • #5
          Thanks for helping out. The code 43 issue has been a concern ever since I got the car. A blanked EGR can still leak through the gasket, and that will cause stumbling from time to time.I found a 3 mm. thick aluminium plate that I used for a blanking gasket together with some gasket cement. When spring comes I'll find a better material.Another cause may also be that the EGR causes buildup of soot inside the inlet manifold. Petrol engines aren't as troubled with this as diesel engines are, but I'd like to take the manifold off and give it a good clean. If bits of soot comes loose and gets passed the valves it will also cause the engine to act up. The Corsa has been running fine all winter, the only issue now is when driving at cruising speed down hill and depressing the clutch while using the brakes to come to a stop. In these situations the engine often dies. I've owned cars that do that, but it's not a big problem, and the cause may simply be momentum,-something moving when it shouldn't that causes the engine to stall.

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          • #6
            Sounds like a sticking ICV or just a dirty throttle body - not uncommon on those when they get to higher mileages. I use a cleaner for marine engines which is far better than carb cleaner. Look on ebay for Quicksilver Powertune - Johnson and Evinrude do a version as well which is just as good.
            1972 Viva restoration thread - http://www.thecorsa.co.uk/projects-b....html#post1534

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            • #7
              Throttle body has been cleaned last summer, but a sticking ICV sounds about what it could be. That would also explain why the idle sometimes revs up when it is very cold outside.If cars were maintained like an aircraft these problems would never happen. I'll try to get hold of some Quicksilver Powertune.

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