daveparkinson
Member
My 2.2 z4 when I start the engine on a slow rev it coughs and burbles hard to explain but on full foot down it seems ok any help would be greatly appreciated
On acceleration
- Thread starter daveparkinson
- Start date
Attleborough, Norfolk
daveparkinson
Member
Engine miss fires sounds rough rev counter goes up and down new plugs looked for air leeks none took the disa valve off seemed ok took maff of seems ok now I’m lost was running well until February took it off the road until June that’s when it started
Scan it for codes, should be the first thing you do when a problem arises.
If there are no codes set I would then take a look at live data with a good scanner and see with the engine running and up to temp what the fuel trims are doing. High fuel trims are a pointer to possible air leaks as enuff_zed listed. If you can't find any then a smoke test usually finds any across the engine.
Just seen your update with rev counter rising and falling, check out the idle control valve, spray carb cleaner in it off the car to clean the internals. When clean if you shake it in your hand the inner workings should rattle. Put it back on and see if that solves the issue.
If there are no codes set I would then take a look at live data with a good scanner and see with the engine running and up to temp what the fuel trims are doing. High fuel trims are a pointer to possible air leaks as enuff_zed listed. If you can't find any then a smoke test usually finds any across the engine.
Just seen your update with rev counter rising and falling, check out the idle control valve, spray carb cleaner in it off the car to clean the internals. When clean if you shake it in your hand the inner workings should rattle. Put it back on and see if that solves the issue.
You will have all sorts of codes set, cancel them, go for a run and see what comes back, if you have a BMW compatable code reader it will show where the problem is.