Question about 1992 Audi 100

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I am Having the same problem can anyone tell me the solution. 1994 Audi A100 2.8L engine wont start no spark at plugs and all seem ok Petrol seems to work electrics seems ok

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  • frankket163 Oct 09, 2010

    Car was going Ok but it cut out suddenly So dont think its a crank sensor thing. Have checked that there is no power going into power unit . Engine cranks alright . Have checked ignition switch and also immobilizer all ok

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If you can physically see there's no spark at the sparkplugs then you need to check the HT leads(spark plug leads), resistance should be no more than 14 Kilo Ohms per foot of cable! If they're ok check the coil pack for signs of arcing to earth(very common in these cars!) and if they are getting a 12 Volt supply from the ignition, if ok then check the amplifier which is screwed to the top of the air filter housing to see whether voltage is getting through from there, if ok check the crankshaft position sensor! (Also a common fault on these) Has your vehicle got an immobilizer? These when activated, disable the engine control unit and stop the signals from getting to your ignition amplifier module!

Posted on Oct 09, 2010

  • benzev Oct 09, 2010

    If there's no voltage at your power unit that means the problem is from the supply of your engine control unit. Check that you have a good 12 Volt supply and a good earth going into your ecu if not check your main power relay, these are common to fault!

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