UK: Misfire and start stop A3

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01-29-2023, 10:01 AM

Radagast190

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UK: Misfire and start stop A3

I’m hoping someone here has had a similar issue or can shed some light on the issues I have. I have a 2013 A3 1.4 tfsi sport with 44k on it. For the last few years it’s had a problem with the stop start. It works fine sometimes then it’ll stall, and if that happens the the car will run rough, until I turn it off and on which in the past cleared it. It’s been looked at numerous times by an Audi specialist but never got to the bottom of it. Battery changed, and they tried a speed controller (I think) replacement but no good. Wasn’t a real problem as I just turned it off, however: A new problem has developed, which may or may not be linked. It’s ‘soft misfiring’ all the time, only very slightly but fells slightly rough at idle. Twice it has got worse and the engine management light has flashed. Off and on resets but still slightly rough. Taken it in and misfires show up but can’t find the problem. Plugs changed, ignition coils are fine and an air intake performed. Also filled it up with v power… still misfiring. Any ideas?