S2 Rs4 Code 21 Ignition Failure Misfiring

[Trowy88]

Hi guys I'm Daniel how are ya?

Sorry I'm new here and just bought a lemon and wondering if you could HELP PLEASE?.

my s2 c34 Stagea has been to the mechanics 3 times and they can't sort it

I had a misfire fault a while ago turned out to be coil pack, so replaced all 6 and spark plugs too.

I've had the battery seem to go flat for no reason too, multiple times I've had to charge it to be able to start it, not sure if it needs replacing or if there is something causing it to go flat???

Now I have this fault 21 which is "ignition failure" and after looking at it they noticed the clips from the coil harness a few had broken so the connectors could be coming loose and causing misfire, so I had to replace the coil pack harness.

Now past few days the car has done 3 things

1)

Turn on and no warning lights and runs fine for a bit, then runs like its on 4-5 cylinders,

2)

Then kept running like shit with the check engine light on all arvo.

3)

Stopped to get fuel, left accessories turned on by accident then went to start and it was like the battery was flat so I got a jump start and now everything seems ok

Now back to misfiring badly.

I replaced the battery yesterday too as my mate tested it and said it failed the test but still same issues.

ANY HELP AT ALL WOULD BE AWESOME.

Cheers

Daniel

[8ull8ar]

I'm no mechanic (nor autoelectrician), but this sounds like bad news. The symptoms may indicate a wiring or electrical insulation fault, your current isn't strong enough when it hits the sparks to give consistent igniton? Had the same issue. Losing some insulation can mean that your battery charge leaks out too, leading to your battery problems. I've had similar issues in the past.

If you have a decent autoelectrician amongst your contacts, it's time for a visit. This issue is often one they hate, as locating the source of the leak can often be troublesome.