IS engine problem still not working

Mon Jun 23, 2008 1:00 am

hi guys just a quick question,i have just finished my IS conversion on my 316i,when the car is running its a bit lumpy,it kinda hezitates when you try and rev it,while it was running i was just checking all the,hoses and if there where any air leakes,i started checking the leads,i pulled number 1 lead out and the plug hole was full of either petrol or oil car did not change idle or get worse,put it back in,then i slowly pulled the rest out one by one,they were dry and the idle changes and runs even more lumpy,could the coil be at fault,not sparking 1 properly.any help would be greatful thanks INDY

Mon Jun 23, 2008 5:45 pm

The oil around the spark plug is just from a leak in the cam cover seal

Mon Jun 23, 2008 6:22 pm

Mine was the same . Be careful running the car like that as there is a fire risk, or so I'm told. A mate ran a 5 series with the same problem and the engine went up in flames. Changed mine the day after hearing that story. Rocker cover gasket set will only be buttons and take 5 mins to change.

Mon Jun 23, 2008 10:13 pm

so could the coil be at fault why it is running lumpy,the car backfires when you slightly rev it,when i pull number 1 lead out the idle stays the same,when i take the rest out the car runs worse,rab-doo i have recently done the headgasket and the rest of the gaskets,thanks INDY

Mon Jun 23, 2008 11:32 pm

No, the coil should be fine. Whats happening, is the oil that has leaked out of the cover gasket has surrounded the sprak plug and has run down the thread and onto the electrodes of the plug. Damp electrodes will not spark, therefore the cylinder will not 'run'. Take the plug out, wash the spark plug bore through with a small amount of brake cleaner, dry the plug, fix the leak and all will be ok

Happened to mine about 2 years ago

And yes, there is a fire risk

Sun Jun 29, 2008 11:45 pm

hi guys,i sorted the rocker cover gasket out and cleaned all the plugs and plug hole,but the problem has not been fixed and the car is still running lumpy,yesterday it got worse,,when i pull number 1 and 2 lead out the car runs the same,when i have put them back in and i i move the coil pack and push and move the leads the car runs more better,can anyone help please as this is my daily driver

thanks INDY

Mon Jun 30, 2008 7:21 am

Check the leads on 1 & 2, failing that try a known good coil pack.

Mon Jun 30, 2008 9:31 am

Sounds like the leads could be fecked.
Should you require a replacement set i have a good set from an iS here.

Mon Jun 30, 2008 1:57 pm

pm'd you spadge