Question about 1992 Audi 80

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I have a 94audi 80tdi.The yellow vacuum unit beside the air filter box is clicking mad fast when the ignition is on. she wont start. she is taking diesel to injector pump but wont pump any to the injectors. I have changed this vacuum unit, Injector pump, and the Engine ECU. Still the same, clicking and wont start. Any ideas?.The ignition key is just a solid one, [no chip]. The Injector pump has a fly by wire system.[no throttle cable]. Does this car still have some kind of immobiliser system. if so where is it located. Maybe this has nothing to do with my problem.If i dissconect the black round plug from injector pump on another Audi80tdi the same clicking occurs. Please help me fix this.Regards,Terrance, Opel mechanic for 18 years.

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  • terranceodon Jun 24, 2009

    hi, I changed the ignition relay 339 inside car behind pocket under steering wheel. but no good. would you know the no, on top of this relay under the bonnet. on other audi80tdi i removed all them relays 1 by 1 and the clicking did not start. sorry, i asked before, is their some kind of immobliser on this car, as i hope i do not have to change back injector pump. Regards , Terrance.

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Hi

The clciking noise is due to fuel pump relay, which has gone bad or has one of its terminals shorted with other and needs a replacement. Please check the fuel pump relay and other relays aswell. Check the relay in the fuse box besides the airfilter box.

Please do accept this solution and revert for further assistance.

Thanks
Rylee

Posted on Jun 24, 2009

  • Rylee Smith
    Rylee Smith Jun 25, 2009

    Hi Terrance



    I dont think there is a immobiliser in this car, however you can try to change the injector pump, or before that change the fuel pump relay & check if it works.



    Please do accept this solution and revert for further assistance.

    Thanks
    Rylee

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