Losing faith in my first BMW
2001 540i 6sp
This is my first BMW and have had it for over almost a year. Unbelievably fast when i first got it and wasn't able to fully exploit it considering it was the first stick car i owned. By the time i learned how best to drive the car i already started having problems.
What i already went through?
Now i realize that i had went through the obvious so i was fine with it honestly. But then the real test for my patience began..
After that fiasco i had the check engine light come on. So i get an inspection 2 done and here is the verdict.
P0171 & P0174 (System Too Lean Bank 1 & Bank 2)
Jeez.. I take it to a mechanic that was highly reccomended and before i change o2 sensors he tells me it is 100% not 02 sensors and that it is my intake manifold. Needed to be resealed and change both knock sensors there along with rear plate.
That shit wasn't cheap.
I get it done and what do u know, still gettin the codes. Before i had that done the car turned off on me twice while it was raining. after these repairs it happens again. a lot more serious this time around. (everytime i turn it on, the rpms go up normally then go straight down and off on the way back down.
Turns out there is a hole in a hose. Apparently it was too close to exhaust or sumthin according to the friend who spotted it. Changed it. Noticed performance increase, but light comes back on. Same problem with the error codes although car doesn't turn off anymore and idl'es really well at a lower number now.
Then before i continue to do more things, after i had the hose replaced and the intake manifold stuff done, i was sitting idling and this code comes up twice:
ENGINE FAILSAFE PROG
ENGINE FAILSAFE PROG
So i go ahead and assume there must be just a few more issues left causing the codes.
Dirty or faulty MAF sensor, Pre-catalyst 02 sensors, fuel filter, or another air leak somewhere. What do i do? I change the fuel filter, both front 02 sensors, and get a smoke machine to check for vaccum leaks all in one shot so i can finally get on with my life.
So far i did an Inspection 2 and..
Sealing Intake + both knock sensors + rear plate
2 o2 Sensors
smoking the car out (no visible leaks btw)
if i count the whole radiator bs i spent almost $1k for with the $1300 i have spent for these 2 damn error codes i am really losing my patience here..
I am running out of ideas guys, and i have expired inspection stickers. I want this done with already, i don't have the time to keep playing this guess game. I have never seen such an industry anything like the automotive technician field. It's the only one where i have been told so many "i dunno.. it might be.." Why is it so hard to trouble shoot and problem solve for some people? I try to give these guys hints from my experience with the car, after all.. the customer or the "patient" is usually the best source of information to narrow down a diagnosis. I think i made the mistake of having more than one source servicing the vehicle. but how can i be blamed for that when i am supposed to not only fix the problem but also "shop around"?
anyway, after doing these repairs the perfomance is alot better and i haven't seen the engine failsafe prog message again but the problem isn't fixed yet and i feel like the performance still isn't up to par. It's not as smooth and agile as i remember when i first got it with 45k miles. The car was so fast at that time that if i were driving on the highway and accidentally pressed gas down too much it would burn out for a second. It was very impressive.
After these repairs it seems to be running a little quirky and will 'surge' or 'lurch' as another poster put it, when at a stop or during slow acceleration (idle up for a second, then back down while holding down clutch) (never happened before). sometimes might even cut off.
Some hints that may help in addition to the surge/lurch issue is that there is this hard to describe hesitation when i accelerate. It a split second sound i hear that sounds like the car is clearing its throat. I don't know how to explain it. I just want the car to be how it was when i first got it.
I have one more hint that may help. The car seems louder than normal. I made this complaint early when i had the car after i went through the cooling repairs. it just sounds like a hoover vaccum when i rev the engine and i remember it being so much quieter. i thought the hole in the hose would go ahead and fix that but it didn't. It still does the hoover sound now and the surge/lurch thing. that's really all i can say to help.
One time a few months back i accidentally reversed the car over a 2ft high curb. It got caught over it and couldn't get it off. One of the back wheels was actually elevated about the ground a few inches. anyway, we jacked the car up and luckily the car flew back and came unstuck. in the process some of the under body was scraped. There was minor damage (thank god) but this incident may have something to do with it. i highly doubt it personally because this happened well after the lights were on.
Anyway i'm talkin too much, please help. thank you.
Last edited by xx00xx; 11-03-2006 at 01:53 AM.