BMW e39 540i Multiple Misfires

[Alexander778]

I have a bmw e39 540i year 2000 and only 2 cylinders are working... there seems to be no vaccum leak, or intake leak anywhere... NOTE this happend in 2 DAYS!? so i highly doubt 6 coils would go bad all at once, the fuel injecter lines seem a little worn... but i highly doubt thats the problem... the idleing is absolutely HORRIBLE, its rough, the whole car shakes. i have NO brakes, and when i give it a little gas nothing happends, nobody seems to know whats going on with my car.... sometimes i feel like karma just is out to get me any help....

[AMGlol6]

It wouldn't even start if it was literally not firing on 6 of the 8 cylinders. You need to find out specifically how many and which cylinders are misfiring. Have the engine codes read to begin with. What makes you assume there are no vacuum leaks? After pulling the codes, you will likely be pointed in the direction of finding an intake leak. Please provide us with more information and specific fault codes so we can help guide you in the right direction.

[bmwdirtracer]

+1; on this engine, intake/ccv leaks are by far the prime suspect - and unless you've had a professional smoke test of the intake system, I'd bet on at least one major leak. Make sure the car is smoke tested after any leaking parts are replaced, too!

That, and exact trouble codes from a BMW diag computer, and maybe a fuel pressure test, or a crankcase vacuum test, or exhaust backpressure test, depending on codes and live data.

Unless of course the car has overheated; in which case the problem may be WAY more serious.

[Alexander778]

It says cylinder 1-6 misfire codes, & a multiple misfire ... Also a cam sensor!?? Which I don't get ... I replaced the fuel filter because I might have guessed it was the regulator... It didn't do anything so i highly
Doubt it's fuel related

[02325]

since you have misfire codes for 6 of the 8 cyl.

when was the last time the plugs were replaced?
remove coil in cyl 7 and put it in cyl 6. clear faults and see what return, if cyl 6 still comes back than you know its not a coil.

but having a hard brake pdeal mean you have a massive vac leak. check the master cyl hose for breakage or splits.

[Alexander778]

I have all new coils it's not the coils... Or the plugs, I need to do a smoke test... Where & how can I do one?

[Mkuehl]

It wouldn't even start if it was literally not firing on 6 of the 8 cylinders. You need to find out specifically how many and which cylinders are misfiring. Have the engine codes read to begin with. What makes you assume there are no vacuum leaks? After pulling the codes, you will likely be pointed in the direction of finding an intake leak. Please provide us with more information and specific fault codes so we can help guide you in the right direction.

My codes
P0300
P0301
P0302
P0303
P0304
P0305
P0306
P0307
P1738
P1734
P1743
P1746
P1186
P1187
P0136
P0340
P0116

Its alot but please help

- - - Updated - - -

It wouldn't even start if it was literally not firing on 6 of the 8 cylinders. You need to find out specifically how many and which cylinders are misfiring. Have the engine codes read to begin with. What makes you assume there are no vacuum leaks? After pulling the codes, you will likely be pointed in the direction of finding an intake leak. Please provide us with more information and specific fault codes so we can help guide you in the right direction.

P0300
P0301
P0302
P0303
P0304
P0305
P0306
P0307
P1738
P1734
P1743
P1746
P1186
P1187
P0136
P0340
P0116

[shadowpuck]

Please post your own thread so that we can help you.
with the codes - please post the codes and the description.