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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2 Answers

Prob with honda prealude runs when it wants to will start fine one min then u turn it off and it wont start seems like no fire to cioil

what engine?
fails hot engine, or cold engine and what engine of the many?
seems dont work in repairs.
ever do a tuneup ever?
sinces it sometimes runs we can check off bad engine. of the 4.
here they are. NO STARTS:
1: loss of 12vdc electric power to the EFI system. (dash lights dim?)
2: bad engine (skip this)
3: bad spark , seems is not an option here, we test all spark at all cylinders using a good new test spark plug.
Its a honda, and we check timing, too,, using , a timing light.
if the spark is good and timing is bad, then the timing belt slipped
if it slips more, the valve in the head bend. end of motor.
sometimes no starts, saves the engine, from itself. so i do spark 100% or better, on all honda's, i do a cylinder leak down test by hand
so i dont MAKE IT WORSE. (it's and interference engine)
4: bad fueling, flooding or starvation, readling spark plug tips tells me
which it is.

3.0L & 3.2L is Non-Interference , no engine stated. so ....

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1 Answer


if vechicle getting spark and fuel.timing could be off due to a worn timing belt.i would do a compression test see what condition the engine is in.

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I have a 2000 chey tracker and there is no spark going to the spark plugs. the engine cranks over just fine.. but wont start. the spark plugs use a coil pack the ignites it but they dont seem or look bad.....

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I have a 2003 audi a4 cabriolet 2.4 petrol, mileage is over 100,000 and it is misfiring, coil pack has been changed twice now, spark plugs have also been changed, oil has been changed and it is still...

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In the mornings my car doesnt want to start until after trying for about 2 minutes.

Hi, if your car is a diesel then the chances are that the glow plugs need replacing as this is the most likely cause.

If the car is petrol then i would get the plugs and leads looked at make sure they are clean and not damaged.

Its worth getting the fuel line checked in case the fuel is draining back into the tank this would happen if the fuel pump is on its way out.

Let me know if its petrol or diesel then i can assist you further ok

Oct 08, 2009 | 1994 Volkswagen Golf

1 Answer


There are some common things that causes a misfire, one of them could be a faulty spark plug or a bad spark plug wire, another could be a clogged fuel filter, if both of those solutions fail try having the timing checked. Good luck.

Mar 11, 2009 | 2001 Audi TT

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Mar 09, 2009 | 1994 Volvo 850

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Audi 2001 a4 1.8t

There are two things to check.
1. It is producing a spark.
2. It is getting petrol through.
To check whether is producing a spark.
Remove one spark plug from engine. Reconnect HT lead and hold it touching car chassis and turn the engine. Do no hold the Ht lead with bare hands while doing this as it carries thousand of volts and will give you nasty shock. Hold it with some insulted material .
When you turn the engine you see spark across the plug electrodes.
As for fuel, trace the fuel pipe coming into the carbureter and disconnect pipe and have someone turn engine .Petrol should gush out showing that the petrol pump is working.

Oct 14, 2008 | 2004 Audi A4

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