[saks]

Have a 07 335i 60k miles, twice in the past week I have punched it when trying to pull out into oncoming traffic and the check engine light has come on. When I slowed down to a stop light its runs really rough. I appreciate any advice

[saks]

Also, once the car is turned off and back on the check engine light is off and no rough idle

[catcher22]

check for codes

Same thing used to happen to me before HPFP went out

[saks]

Thanks... how do i check codes?

[datbimmer]

Had this happen when a coil was on its way out.

[Gizm0]

You are getting a misfire for some reason. It could be your plugs, coils, injectors, fuel pump etc... many things.

To read the code, you need to bring your car to an auto store so they can plug a code reader into your OBD II port and tell you the code. Then come back here to tell us what the codes are.

Is your car stock?

[saks]

Thanks Gizmo! I'll let you know..

[saks]

Car is Stock

[saks]

misfire on cylinder 5, going to replace spark plugs this weekend but need to find spark plug socket

[Miller335]

Originally Posted by saks

misfire on cylinder 5, going to replace spark plugs this weekend but need to find spark plug socket

That is the first step in all of this.
Let us know how it goes.

[mike3000fl]

Originally Posted by saks

misfire on cylinder 5, going to replace spark plugs this weekend but need to find spark plug socket

i would check the coils first. switch coil 5 with another one and see if the code changes to another cylinder.

[saks]

Does anyone know the Bosch Coil part #?
Thanks Mike3000fl I will try that first

[mike3000fl]

I meant try switching it with a coil from one of good cylinders. Then order a new one if the ecu says the misfire moved to whatever cylinder you put the coil from 5 onto.

[saks]

I dont have a code reader of my own, Advanced auto has the bosch coil for $30. I figured I would just replace.. just need to make sure i have the right part number

[hockeyplayer]

Originally Posted by mike3000fl

i would check the coils first. switch coil 5 with another one and see if the code changes to another cylinder.

^^^THIS^^^

[Gizm0]

Originally Posted by saks

misfire on cylinder 5, going to replace spark plugs this weekend but need to find spark plug socket

http://www.burgertuning.com/N54_BMW_...t_adapter.html

As said above, don't waste $30 buying a new coil if you don't know for sure that's the cause of your misfire.

By swaping the coil, what mike meant is you should first take the coil on cylinder 6 and move it to cylinder 5, and vice versa. Then drive your car around again until it starts misfiring again. After that, go back to advance auto parts to see if the misfire still comes from cylinder 5, or if it has moved to cylinder 6. If it has moved to cylinder 6, it means that your coil is the culprit and needs to be replaced. If it stays on cylinder 5, then you need to change your plugs first and hope it will fix the problem. If it doesn't then there is a great chance the injector is bad and chances are the dealership will have to change all 3 injectors on that bank (cylinder 4,5 & 6) which isn't cheap.

[theblackmamba]

try changing your gas up.

shell v-power on an empty tank to full.

report back.

[saks]

Ok thanks guys, I am going to change the spark plugs this weekend, got the spark plug adapter from Snapon wiht "Free" overnight shipping. I will also fill up with Shell this weekend. Is there anyway to reset the 'service engine soon" ?

[Gizm0]

Originally Posted by saks

Ok thanks guys, I am going to change the spark plugs this weekend, got the spark plug adapter from Snapon wiht "Free" overnight shipping. I will also fill up with Shell this weekend. Is there anyway to reset the 'service engine soon" ?

You know that the spark plugs on this engine have a special star patern right? I doubt snapon has the correct socket but I may be wrong. All I see on their website is just the regular HEX socket. This is the one you need: http://www.burgertuning.com/N54_BMW_...t_adapter.html

Also, when you replace your spark plugs, make sure you don't use anti-seize!!! Otherwise you'll risk breaking the spark plug in the head and then you'll be screwed. Torque to 17 ft.lbs. If you don't have a torque wrench, then hand tight the spark plug, then use a ratchet to go another quarter of a turn.

[saks]

I read on here that others have used this with no problem
Am I wrong?


http://buy1.snapon.com/catalog/item....re&dir=catalog

[Gizm0]

Originally Posted by saks

I read on here that others have used this with no problem
Am I wrong?


http://buy1.snapon.com/catalog/item....re&dir=catalog

Looks like the correct one. I didn't find it when I researched it. You could have bought it for $19 + shipping from BMS instead of $36 from Snapon

[saks]

True, but I needed it for this weekend and got free overnight shipping...oh well