[32valves]

yesterday my car started missing at idle but clears up when you accelerate.
then this morning I get a cel for misfire.
so I tried to do a search for my situation but cam up with 335i threads.
anyone got some direction for me, and I was about to do the deletes and tune.

[Nadir Point]

Originally Posted by 32valves

...I was about to do the deletes and tune.

Assuming it's not already too late for your injectors, add CBU cleaning to the list and you should be good to go.

[32valves]

funny you should say it has never had the cleaning yet...

[32valves]

took the intake off today to see if I have cbu.

[32valves]

so how are you cause rotating the engine and verifing the valves are closed?

[bimmerup-sonny]

Originally Posted by 32valves

yesterday my car started missing at idle but clears up when you accelerate.
then this morning I get a cel for misfire.
so I tried to do a search for my situation but cam up with 335i threads.
anyone got some direction for me, and I was about to do the deletes and tune.

I had CBU clean and at 71K miles, recently at 84K miles,
got bunch of injector codes, and now

P0303 – Cylinder 3 -misfire detected

Engine stutters under 1000 RPM and clears up above that
This issue happened at 77K miles, and I dump in double dose
of Power Service Diesel clean and it went away until now,
I just did another round of PS Diesel Clean then Liqui Moly
but the issue persists

Any recommendations?

[ideloera]

Originally Posted by 32valves

funny you should say it has never had the cleaning yet...

Looking at your intake and the flaps, the CBU is not bad at all. When it is bad you can barely move the swirl flaps.

[32valves]

Originally Posted by ideloera

Looking at your intake and the flaps, the CBU is not bad at all. When it is bad you can barely move the swirl flaps.

you are right the car has 78k and I run water meth it's much cleaner than my buddies 535xi. But I get #4 misfire but clears up after 1100 rpm.

[ideloera]

Originally Posted by 32valves

you are right the car has 78k and I run water meth it's much cleaner than my buddies 535xi. But I get #4 misfire but clears up after 1100 rpm.

Do you have the deletes in place?

[32valves]

no but I do have them

[Nadir Point]

Originally Posted by 32valves

funny you should say it has never had the cleaning yet...

I did not "say" that - I "assumed" it.

Thanks for adding that important bit of information.

[Mik325tds]

Originally Posted by 32valves

so how are you cause rotating the engine and verifing the valves are closed?

I used a borescope looking into the tangential ports. Then use a starter switch to turn the engine (it costs abot $10 at harbor freight).
I must agree with ideloera that your CBU doesn't look bad at all. Do actually have misfires or does the DDE just say it detected misfires?

[32valves]

it's has a rough idle, and it gets a #4 misfire code, and a #4 injector code also.

[bimmerup-sonny]

Originally Posted by 32valves

it's has a rough idle, and it gets a #4 misfire code, and a #4 injector code also.

I am having my indie garage sending all 6 injectors out for cleaning,
mine has rough idle with Inject #3 misfire code.

Will post back if they can clean them at all, otherwise I would have to replace at least #3 (misfire code) and #5 (many minor codes). They are expensive,
~$520 each and 2-3 hours of labor.

[Mik325tds]

There's always the possibility that the injectors are in fact bad. But I'd always try updating the DDE SW to the latest level and resetting all adaptations first.

[335dsleeper]

^ updating the SW took care of my Injector codes post CBU cleaning.

[32valves]

Originally Posted by Mik325tds

There's always the possibility that the injectors are in fact bad. But I'd always try updating the DDE SW to the latest level and resetting all adaptations first.

can bpc in n.c. do it I was about to do the stage 3 and all the deletes, I was running water meth dp the cbu isn't to bad.

[Mik325tds]

Originally Posted by 32valves

can bpc in n.c. do it I was about to do the stage 3 and all the deletes, I was running water meth dp the cbu isn't to bad.

I actually don't know if BPC can do it, but I would be very surprised if they can't .

[335dsleeper]

^ Yes BPC can do it!

[glitdi]

Originally Posted by 32valves

it's has a rough idle, and it gets a #4 misfire code, and a #4 injector code also.

Check the resistance on the injector.. should be about 180k omh if I remember off the top of my head

[32valves]

Originally Posted by glitdi

Check the resistance on the injector.. should be about 180k omh if I remember off the top of my head

I will today, after work when it's 100'f...

[32valves]

spent $6 and my dent puller got it out.

-m14 1.50 lug nut
-13 mm nut
-1" steel collar

dent puller, wel all three together and connect to dent puller and about 20 hits