[Eracer76]

Just an update on my car if anyone's interested... I took my car to the dealer Monday after I returned it to "stock", and they found a faulty #3 injector and replaced it under my 60 day used car warranty

The car runs much better now and I havent had a single code or misfire since, and I even installed my new Cobb S1 aggressive 93 map... and man oh man does it run GREAT! Now its time to re-install the rest of my mods

[Jeff@TopGearSolutions]

Originally Posted by Eracer76

Just an update on my car if anyone's interested... I took my car to the dealer Monday after I returned it to "stock", and they found a faulty #3 injector and replaced it under my 60 day used car warranty

The car runs much better now and I havent had a single code or misfire since, and I even installed my new Cobb S1 aggressive 93 map... and man oh man does it run GREAT! Now its time to re-install the rest of my mods

That is why I asked about fuel codes. They usually replace 3 injectors or 6 but atleast its working now.

[Eracer76]

Originally Posted by Jeff@topgearsolutions

That is why I asked about fuel codes. They usually replace 3 injectors or 6 but atleast its working now.

Yeah, I never got any other codes besides the misfire codes...
The dealer said that the HPFP and 4 of my injectors were already replaced under the recall last year... So I guess that means I still have one "old" injector in the car

But at least its running great for now

[Glowin]

Originally Posted by Jeff@topgearsolutions

All of this just comes with the territory. I always tell people to stay in warranty. I know I'm out of this car as soon as its done.

Car is great but too many quirks.

So what would you get? For the last 12 years or so, I've driven only turbo'd cars, and have intentionally only bought those, knowing the potential for tuning them to make big power with ease and little $. I don't think I'll ever go with an NA engine again!

Even Audi's 3.0T engine that's supercharged can be tuned to squeeze out a lot more power, and I at first thought that superchargers didn't leave much on the table, only turbos did, but looks like that's not the case with that engine!

[GQ335i]

Great writeup Jeff! Very helpful. Thanks!

[Yeahdickey]

Originally Posted by Eracer76

Yeah, I never got any other codes besides the misfire codes...
The dealer said that the HPFP and 4 of my injectors were already replaced under the recall last year... So I guess that means I still have one "old" injector in the car

But at least its running great for now

this sounds exactly like what i am going through right now. Recently purchased a 2008 335i sedan, has 43k miles, and i am getting the shuddering/hiccup at low (2-3k) rpms, and sometimes throwing misfire codes on cylinder 2,3 and random.

My HPFP and Injectors were never changed, so i am going to the dealer on Tuesday to take care of those, hoping that will solve it.

Also, my Spark Plugs have not been changed, so i am changing those this weekend.

Any other advice?

Ill post my results.

[Jeff@TopGearSolutions]

Originally Posted by Glowin

So what would you get? For the last 12 years or so, I've driven only turbo'd cars, and have intentionally only bought those, knowing the potential for tuning them to make big power with ease and little $. I don't think I'll ever go with an NA engine again!

Even Audi's 3.0T engine that's supercharged can be tuned to squeeze out a lot more power, and I at first thought that superchargers didn't leave much on the table, only turbos did, but looks like that's not the case with that engine!

Well my last car was N/A but I added a supercharger. It was quite fun and VERY reliable. Oh and might I mention 70K miles and it NEVER saw the dealer.

Next on my personal list is a c6 z06. For those who know me I've been talking about it for years even before I bought my BMW. Hopefully next year

Originally Posted by Yeahdickey

this sounds exactly like what i am going through right now. Recently purchased a 2008 335i sedan, has 43k miles, and i am getting the shuddering/hiccup at low (2-3k) rpms, and sometimes throwing misfire codes on cylinder 2,3 and random.

My HPFP and Injectors were never changed, so i am going to the dealer on Tuesday to take care of those, hoping that will solve it.

Also, my Spark Plugs have not been changed, so i am changing those this weekend.

Any other advice?

Ill post my results.

That should be it.

[Yeahdickey]

Originally Posted by Jeff@topgearsolutions

That should be it.

Thanks Jeff. Do you think i should check/replace the coils yet? or just try the above first?

[Jeff@TopGearSolutions]

Originally Posted by Yeahdickey

Thanks Jeff. Do you think i should check/replace the coils yet? or just try the above first?

I always have a saying if it aint broke don't fix it. (But if you got them for free then yes). Otherwise wait and see. Coils are an easy swap.

[Eracer76]

Originally Posted by Eracer76

Yeah, I never got any other codes besides the misfire codes...
The dealer said that the HPFP and 4 of my injectors were already replaced under the recall last year... So I guess that means I still have one "old" injector in the car

But at least its running great for now

Well, guess what guys! I loaded my Cobb AP last week, and just last night I started getting a misfire code on cylinder 4 now!!

So I removed the engine cover and I took a look at the injectors and sure enough, the cylinder 4 injector looks different then other 5 injectors. On the top of the injector, there is a very small dimple in the metal, and 5 of my injectors have this dimple in the center, and the cylinder 4 injector has this dimple off to one side... what a coincidence? I think not...

And is just so happens my car is not covered under my 60 day used car warranty anymore... so, I guess I'll be buying and replacing a fuel injector real soon! I just need to find someone to code the injector for me in the Chicago land area, or just order the cable, do a lot of research, and try coding it myself.

[Yeahdickey]

Originally Posted by Yeahdickey

Thanks Jeff. Do you think i should check/replace the coils yet? or just try the above first?

Changed Spark Plugs over the weekend. Plugs looked pretty worn/black/burnt especially cylinder 1 or 6 (the one closest to the Front).



anyway, still having the issues. Missfire on Cylinder 2,3 and Random misfire codes. Still having the Engine stutter/hiccup in high gear low rpms mid throttle acceleration.

Going tomorrow to dealer to get the HPFP and Injectors looked at for the recall.

any other advice in the mean time?

PS: I have not changed or troubleshooted coils yet. Figure i would get the recall work done first.

Thanks in advance!

[Jeff@TopGearSolutions]

Originally Posted by Yeahdickey

Changed Spark Plugs over the weekend. Plugs looked pretty worn/black/burnt especially cylinder 1 or 6 (the one closest to the Front).



anyway, still having the issues. Missfire on Cylinder 2,3 and Random misfire codes. Still having the Engine stutter/hiccup in high gear low rpms mid throttle acceleration.

Going tomorrow to dealer to get the HPFP and Injectors looked at for the recall.

any other advice in the mean time?

PS: I have not changed or troubleshooted coils yet. Figure i would get the recall work done first.

Thanks in advance!

Its likely fuel related especially if the hardware has not been changed under recall yet.

[Yeahdickey]

Originally Posted by Jeff@topgearsolutions

Its likely fuel related especially if the hardware has not been changed under recall yet.

Fuel related as in Fuel pump?? or bad fuel??

[1sik_335]

Very helpful information.. Thank you

[Jeff@TopGearSolutions]

Originally Posted by Yeahdickey

Fuel related as in Fuel pump?? or bad fuel??

Sorry, fuel related as in hardware (ie injectors, high pressure fuel pump, and or lower pressure fuel pump).

[Yeahdickey]

Originally Posted by Jeff@topgearsolutions

Sorry, fuel related as in hardware (ie injectors, high pressure fuel pump, and or lower pressure fuel pump).

Thanks. Ill update my results tomorrow after my dealer visit.

[SlowerThanU]

Originally Posted by Yeahdickey

Changed Spark Plugs over the weekend. Plugs looked pretty worn/black/burnt especially cylinder 1 or 6 (the one closest to the Front).



anyway, still having the issues. Missfire on Cylinder 2,3 and Random misfire codes. Still having the Engine stutter/hiccup in high gear low rpms mid throttle acceleration.

Going tomorrow to dealer to get the HPFP and Injectors looked at for the recall.

any other advice in the mean time?

PS: I have not changed or troubleshooted coils yet. Figure i would get the recall work done first.

Thanks in advance!

Wow, that first one (#1 is closest to front) looks a bad as mine. Running really rich. I put 6 new plugs in and pulled them after a week. They all were good except for my #2 looks like your #1. I wonder what you new plugs look like now.

[Yeahdickey]

Originally Posted by SlowerThanU

Wow, that first one (#1 is closest to front) looks a bad as mine. Running really rich. I put 6 new plugs in and pulled them after a week. They all were good except for my #2 looks like your #1. I wonder what you new plugs look like now.

damn ... i was thinking of checking mine after a few days, but figured I would wait and see what the dealer says tomorrow since i am hoping its going to be a bad injector(s) replaced under warranty and fuel pump. (neither recall was done on my car yet)

You have any idea whats going on with yours?

[SlowerThanU]

Originally Posted by Yeahdickey

damn ... i was thinking of checking mine after a few days, but figured I would wait and see what the dealer says tomorrow since i am hoping its going to be a bad injector(s) replaced under warranty and fuel pump. (neither recall was done on my car yet)

You have any idea whats going on with yours?

I have no idea.

-I distroyed 2 plugs in my #2 cylinder in about a months time
-Third plug is already black with carbon after a week
-piston top looks pretty wet with fuel and carbon
-compression test is OK, just a little lower than than the others
-currently not misfiring (just light rumble on cold starts) but I have not done a long 1/4 run on the new plugs yet

I am thinking the injector is done or the coil is not giving enough voltage to get a good burn. I am taking her in under CPO warranty this week to see if they can figure it out. Fingers are crossed that ther is no cylinder or valve damage.

[Yeahdickey]

Originally Posted by SlowerThanU

I have no idea.

-I distroyed 2 plugs in my #2 cylinder in about a months time
-Third plug is already black with carbon after a week
-piston top looks pretty wet with fuel and carbon
-compression test is OK, just a little lower than than the others
-currently not misfiring (just light rumble on cold starts) but I have not done a long 1/4 run on the new plugs yet

I am thinking the injector is done or the coil is not giving enough voltage to get a good burn. I am taking her in under CPO warranty this week to see if they can figure it out. Fingers are crossed that ther is no cylinder or valve damage.

Well ... I am officially depressed. Brought it to the dealer today and they are telling me that at least two of the injectors were replaced or checked, back in May at another BMW dealer, and they botched the install, as these injectors have a broken tab and perhaps O ring???

Either way they do not want to touch it and are telling me that i should go back to the other dealer. Their concerns are that they will not get paid for the work they do, because when they send the parts back to BMW NA, they will see they were installed incorrectly, and deny to pay the claim.

I have been on the phones all day with both dealers and with BMW NA. I am getting no where and to be honest with you, I do not want to go back to the original dealer (Braman BMW Miami) regardless, because they clearly messed it up the first time and I am hearing horror stories on their incompetence .

I went back to the dealer this afternoon and pleaded with their Service Director to work with me. They are looking at it deeper now and I honestly think they best i can hope for from them, is a discount on parts and labor. They will "work with me".

I feel defeated. Again, BMW NA, did not want to work with me at all.

[crypticc]

hey - quick question. I don't know if I've watched the matrix too much but my car is showing timing patterns that almost look designed by hand.
e.g. 5 out of 6 cylinders at a partial (but not neutral) throttle load are the same but cylinder 2 is a retarded by a couple of degrees until higher revs or more load applied.
At other times, under a trailing throttle cylinders 1,3 and 5 share one timing, 2,4 and 6 share another timing value, out by a couple of degrees. Or as the throttle is lifted cylinders 1 and 2 go out of time to the rest.

Is this timing, or 'sound effects' engineered by BMW / COBB? It almost looks designed by hand - very linear.

no codes were thrown when I look at the AP.

Thanks in advance.
Chris

e.g.

RPM (RPM /10) Accel Pos. (%) Cyl. 1 (°) Cyl. 2 (°) Cyl. 3 (°) Cyl. 4 (°) Cyl. 5 (°) Cyl. 6 (°)
39.44 22.27 34.88 34.88 34.88 34.88 34.88 34.88
39.45 22.27 34.88 34.88 34.88 34.88 34.88 34.88
39.47 24.19 34.88 34.88 34.88 34.88 34.88 34.88
39.55 28.15 33.75 33.75 33.75 33.75 33.75 33.75
39.61 28.54 33.75 33.75 33.75 33.75 33.75 33.75
39.72 29.3 31.88 31.88 31.88 31.88 31.88 31.88
39.8 33.45 28.88 28.88 28.88 28.88 28.88 28.88
39.95 36.4 23.62 20.25 23.62 23.62 23.62 23.62
40.24 37.38 19.12 15.75 19.12 19.12 19.12 19.12
40.41 41.72 18 15 18 18 18 18
40.7 45.75 16.5 13.5 16.5 16.5 16.5 16.5
40.74 46.24 15 12.38 15 15 15 15
41.27 47.29 14.25 11.25 14.25 14.25 14.25 14.25
41.43 47.05 11.25 8.25 11.25 11.25 11.25 11.25
42.03 47.53 8.25 5.25 8.25 8.25 8.25 8.25
42.42 47.27 6.38 3.38 6.38 6.38 6.38 6.38
42.98 47.31 6 3 6 6 6 6
43.09 47.39 7.5 4.5 7.5 7.5 7.5 7.5
43.63 48.05 7.88 4.88 7.88 7.88 7.88 7.88
43.82 48.12 7.88 4.88 7.88 7.88 7.88 7.88
44.53 49.24 6.75 3.75 6.75 6.75 6.75 6.75
44.86 49.32 6 3 6 6 6 6
45.2 51.34 4.5 1.88 4.5 4.5 4.5 4.5
45.72 54.3 3.75 1.12 3.75 3.75 3.75 3.75
46.42 54.39 3.75 1.12 3.75 3.75 3.75 3.75
46.89 54.79 3.75 1.5 3.75 3.75 3.75 3.75
47.11 54.88 3.75 1.5 3.75 3.75 3.75 3.75
47.73 54.96 4.5 2.62 4.5 4.5 4.5 4.5
48.03 55.05 4.5 2.62 4.5 4.5 4.5 4.5
48.61 55.47 4.5 2.62 4.5 4.5 4.5 4.5
49.12 56.15 4.5 3 4.5 4.5 4.5 4.5
49.58 57.93 4.5 3 4.5 4.5 4.5 4.5
50 62.04 4.5 3 4.5 4.5 4.5 4.5
50.64 67.68 4.88 3.75 4.88 4.88 4.88 4.88
50.75 68.73 4.88 3.75 4.88 4.88 4.88 4.88
51.59 74.34 4.88 4.12 4.88 4.88 4.88 4.88
51.82 79.91 4.88 4.12 4.88 4.88 4.88 4.88
52.36 80.98 4.88 4.12 4.88 4.88 4.88 4.88
52.71 82.98 4.88 4.5 4.88 4.88 4.88 4.88
53.3 84.18 4.88 4.5 4.88 4.88 4.88 4.88
53.76 84.3 4.88 4.5 4.88 4.88 4.88 4.88
54.14 90.62 4.88 4.88 4.88 4.88 4.88 4.88
54.51 99.17 4.88 4.88 4.88 4.88 4.88 4.88
54.86 99.61 4.88 4.88 4.88 4.88 4.88 4.88
55.28 99.61 5.25 5.25 5.25 5.25 5.25 5.25
55.6 99.61 5.25 5.25 5.25 5.25 5.25 5.25
56.03 99.61 5.25 5.25 5.25 5.25 5.25 5.25
56.59 99.61 5.25 5.25 5.25 5.25 5.25 5.25
57.05 99.61 5.25 5.25 5.25 5.25 5.25 5.25
57.13 99.61 6 6 6 6 6 6
57.9 99.61 6.38 6.38 6.38 6.38 6.38 6.38
57.85 99.61 6.38 6.38 6.38 6.38 6.38 6.38

[GQ335i]

Went to take my car out for the first time again today since it was nice out and immediately knew something was wrong. The car took a couple cranks to start up, had a very rough idle, and could definitely tell it was misfiring. Read the codes via the JB4 and told me the following:

29CD Misfirings, cylinder 1
29CF Misfirings, cylinder 3
29CE Misfirings, cylinder 2
29CC Misfirings, several cylinders

Spark Plugs were just changed by the dealer about 5,000 miles ago, HPFP was replaced about 10,000 miles ago, and Injectors did not fall under the recall according to the dealer. Do you think the Spark Plugs would go bad that quickly? If I replace the Coilpacks would you suggest replacing all Spark Plugs as well? Even with the Spark Plugs being pretty new? Thanks!