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  1. dieseljohn

    dieseljohn New Member

    Messages:
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    Location:
    lincolnshire
    Help appreciated !!!

    We are running a 1998 Corsa S reg 1.0 ecotec 3 cylinder.

    Cars has done over 120 k miles, engine was tired, head gasket blowing, oil leaking etc etc , but rest of car is in good nick. So picked up a used engine and been changing it out over the last week.

    Engine changeout has gone reasonably ok but came to start it and engine management light is flashing with ignition on and engine will not start. Fires a few times with dampstart sprayed into inlet but won't start or run at all.

    Used engine came from car with a chipped key, so may have been a year or two newer, but I don't think my car has a chipped key (?).

    Reading another thread it looks like the flashing light may be to do with an imobiliser, but I didn't know I'd got one fitted !!

    The used engine came with all the ancillaries, including ECU which has gone in with the engine. Should I have changed this ECU for the old one and would this cure the problem? Problem I've got now is that it looks very difficut to get to the ECU to change it out , studs look tight also ( I tried removing the old one from the old engine which is on the gararge floor now, and the studs have rounded so the one installed may also prove difficult to remove).

    Is there anything else I can do ?

    Any help greatly appreciated thanks John
  2. R33GT-ST

    R33GT-ST The Turbo-nator

    Messages:
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    Location:
    taunton
    if u can get the ignition barrel & key for the engine & ecu that you have put in the car, then the ecu will recognise the transponder & barrel as it is coded for them,

    alternativly u can do what i had to do before, put the key in the ignition & then place the transponded key next to it so the plastics of both keys are touching turn ignition on & the eml light should go out,
    or you can remove the transponder from the key & tape it on the barrel under the cowling, this should also work(y)
    hope this helps
  3. Dynamic Dave

    Dynamic Dave Qualified lego bricklayer

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    Location:
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  4. dieseljohn

    dieseljohn New Member

    Messages:
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    Location:
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    Thanks for your help , much appreciated.

    looks like thats the problem, I didn't know I had an imobiliser fitted. Unfortunatly I cant get the key that goes with the replacement engine , guy didn't have it when I bought the engine. Looks like best option is to try to change the ECU for the original one. Lokks difficult to get at with engine in and I may have to drill out the studs if original one is any thing to go by. Another way may be to get an auto electrician to re programme the ECU ?? reading some other posts I guess this may cost me around £80- 100.
    Will sleep on it and look at trying to change ECU first over the next few days.
    Thanks again for your help much appreciated , john
  5. Dynamic Dave

    Dynamic Dave Qualified lego bricklayer

    Messages:
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    Location:
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    You might find you'll only be able to get it reprogrammed if you have the Car Pass (the credit card sized document that has all the security codes written on it) - I suspect you didn't get this with the replacement engine.
  6. greasemonkey

    greasemonkey VXon Frontera Monkey VxON Club Member

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    Location:
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    Drives:
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    Hi it seems you have the problem sorted - as already posted - use your original ecu - not really sure why you fitted the other ? the engine swop should have been straight forward and then it would have ran first time without the messing around - unless the ECU has a fault you should always use the original matched to the car - this way the immobiliser ,key and radio codes always match the chassis
    cheers
    Steve
  7. dieseljohn

    dieseljohn New Member

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    Location:
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    Thanks Steve, yes I rushed into it didn't think it was a chipped key and only realised later!! I've learnt the hard way and am in the process of changing the ECU which is difficult to get to with the engine in !! Thanks for your and everyones comments which have helped me work out what I've done wrong, a great forum and great advice, thanks again joh
  8. walker74

    walker74 Member

    Messages:
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    Location:
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    Ive just do exactly the same thing. Changed the engine and it would'nt start. I read the replys you had and changed the ECU this morning, Its not to bad of a job if you take out the battery, battery tray and the expansion tank. I had it all back together and running within about a 1/2hr

    good luck

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