Quote:
Originally Posted by DougiesGoinDeep
I have been doing some research and it seems every thread has a difference answer. I am hoping if I lay everything out here someone else will be able to point me in the right direction.
I started the car yesterday and it was idling very rough, SES light comes on, really rough power while driving for the first couple minutes. Pull over, shut it off for a few minutes, turn it back on and it seems basically normal. Did a short and long drive later that day and nothing unusual other than the SES light still on.
Started the car up again today, same exact thing, except this time it stalled a few times. Turned it off and back on again, seemed to run smoother but not perfect. Went for another drive later in the day (just now) and it seemed normal except for the light.
The drive just now was to the go Autozone to read the codes. P0300, P0301, P0302, P0303. Lots of misfires.
So what I am looking at hear? HPFP? Sparkplugs? Coil?
Some more detail that may or may not help:
-new to me 2010 135i with Dinan S2 tune and 30,000 miles
-the last two mornings were on the cooler side, in the 50's (Boston)
-the car has never needed (according the previous owner and service records) anything replace, sparkplugs, coils, HPFP, etc.
Thanks in advance.
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First, you need a good code reader that can "see" shadow codes. Not just one that can see ODBII codes. With a generic code reader... you won't be able to see the BMW shadow codes.
Get a Bav Tech cable or a good cheap way is with a Can/Bus OBDII blue tooth dongle, like:
http://www.amazon.com/dp/B0084Y8HJA/...I3A0RCM5QL5QNM
...Then use an app like
Torque on your smart phone.
https://play.google.com/store/apps/d...l.torque&hl=en
Second, since your car has a tune(Dinan) the spark plugs should be replaced every ~25K or so. BMW says to change them every 45K miles for cars with no tune(stock). 1M's plugs get changed every 30K. So with a tune you should change the plugs every 20 to 25K miles. Did you use BMW bought spark plugs? Some guys had chased their tail when using aftermarket plugs. Only use BMW plugs, that have BMW/Bosch on the ceramic part of the plug.
Third, when you replaced your valve cover gasket - did you check the plastic valve cover for cracks? They are prone to cracking over time. Check out this thread bellow...
Oil leak, may need a new valve cover gasket
http://www.1addicts.com/forums/showthread.php?t=1008895
Your engine could also have carbon build up on the intake valves. But that would not throw an engine check light code.
Long cranks/cold starts, stalling, rough idle is classic HPFP failure. Has the HPFP ever been replaced?
HPFP failure FAQ!
http://www.e90post.com/forums/showthread.php?t=333519
These pdf's might be of interest. Have you checked with a dealer for any open recalls ? Your problem really sounds like classic HPFP to me.