Ricardo Ramos Posted August 17, 2018 Share Posted August 17, 2018 Hi everyone My name is Ricardo, and I'm looking for help My A3 1.8T 2000 is misfiring on 4th cylinder so bad. I have change the spark plugs, ignition coil, swap the injector, and the problem still there on the 4th cylinder. the engine sputtering all the way even more with the acceleration, the data reader shows only mixture. any help is very welcome Thanks Quote Link to comment Share on other sites More sharing options...
cliffcoggin Posted August 19, 2018 Share Posted August 19, 2018 I suggest you start the diagnosis with a compression test on the engine. It's a simple cheap test that will reveal if there are major mechanical problems with the engine. If cylinder 4 pressure is well below the others you face a very expensive repair. 1 Quote Link to comment Share on other sites More sharing options...
Magnet Posted August 19, 2018 Share Posted August 19, 2018 I would certainly agree with Cliff, since it's simply wasting (already wasted?) money until you ascertain there is adequate and reasonably even, compression on all cylinders. Kind regards, Gareth. 1 Quote Link to comment Share on other sites More sharing options...
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