Help! Weird car wont stay running sometimes

[Muq Jon]

So I have a weird problem on my golf 1.9 TDI 2007, when I switch the ignition on the car starts up however as soon as I let go of the key SOMETIMES the engine will shut off. Sometimes the car will stay running no problem. When the engine shuts off i have to switch ignition to on to start car, hold the key in on position and very slightly give gas for a few seconds. Then when I let go of the key, whilst still having gas pressed, car will stay running. At this point when letting the key go rarely it tries to shut off for half a second the engine will shut off/skip but then stay running. Some background, this problem only started happening when 2 weeks ago I switched the ignition on and the engine was shaking a bit so i gave it some gas but gave too much and the engine shook a lot then shut of. When trying to switch back on it wouldnt start, it would crank but no start. I left it till the next day and it did start after some cranking but then this problem started. It starts first stime straight away now. Also around 3 weeks ago i changed the ignition housing and switch, could it be to do with the electrics in the control module under the steering wheel? No engine light, no fault codes. Very perplexed.

Topic