R53, a few small problems I'm having

[jordanfaf]

Cars just back from a service a few days ago, went for a long drive today and put the car through its paces.

1) I have a slight shuddery idle which I have put down to a rusty pin 3 on my ignition coil ( is this correct?)

2)I seem to be getting a misfire under harsh acceleration around 2500 revs in second (coil aswell??)

3) Pulled into my driveway after a flat out run down the road and got a foul smell from the exhaust. Don't think it was cat, but not too sure.

As I said cars back from a service. Had its plugs and oils changed aswell as diagnostics to check for any problems and nothing came up as problematic. Just wondering if these few things are normal or down to the bad pin 3 coil. Thanks a lot

[irlmin]

It is impossible to say from this distance , have you cleaned up the no 3 lead and contact if not try a bit of sandpaper on both and check if it helps . the smell you got may or may not be cat related , was it like rotten eggs or do you have an oil leak onto the exhaust manifold or indeed residual oil from the filter change burning off the exhaust --- its common . without a decent diagnostic session I can't be any more specific .
G

[jordanfaf]

It is impossible to say from this distance , have you cleaned up the no 3 lead and contact if not try a bit of sandpaper on both and check if it helps . the smell you got may or may not be cat related , was it like rotten eggs or do you have an oil leak onto the exhaust manifold or indeed residual oil from the filter change burning off the exhaust --- its common . without a decent diagnostic session I can't be any more specific .
G

Cleaned the pin 3 wit some wire wool. Idle is a lot better. But I'm getting a problem with misfiring under heavy acceleration. Have it booked in on Monday to check for any fault codes. Any idea what's causing the misfire. It's generally in high gears above 3k revs I get random misfires.

[jordanfaf]

Update:
Idle has returned to being very rough. This problem is really beginning to annoy me now. I've seen others with similar problems ( rough idle and misfiring) and theyr saying to check for vacuum leaks on my intake.

Also seen it may be a clogged cat, which may explain the smell aswell? But I thought that would have been noticed in a service on emissions. Beginning to worry I'm gonna spend a fortune trying to find the problem and never fix it

[irlmin]

The R53 is a very simple design and I am surprised you have not found the problem taking into account the things you have checked , has a diagnostic check revealed anything does your EML light come on has anyone done a 'live' data check there should really be no reason you should have to spend a fortune to solve what may be a small issue .
G

[jordanfaf]

The R53 is a very simple design and I am surprised you have not found the problem taking into account the things you have checked , has a diagnostic check revealed anything does your EML light come on has anyone done a 'live' data check there should really be no reason you should have to spend a fortune to solve what may be a small issue .
G

No warning lights, Its booked in tomoro at the garage to check for fault codes. It was in for a service 2 weeks ago and had no fault codes on it.

[jordanfaf]

Back from the Garage now. Misfire in cylinder 3, likely being caused by a rusty pin 3 on the coil as suspected. when I'm replacing it do you reccoment an OEM or something like an msd pack