Quote:
Originally Posted by 10E92335
This is gonna be a post two months in the making trying to scour forums for information to no avail trying to fix my completely bone stock 2010 N54 335i. I'm gonna list everything i know about my car right now Any help would be hugely appreciated! hoping someone in here knows a whole lot more than i do.
Symptoms are as follows:
No Long Cranks ---> Starts to extreme rough idle jumping around 1200RPM---> Only slight rough idle once closed loop (very minor shakes every second or so increasing frequency with the amount of RPMs) ---> hard to hold RPMs stable (drops slightly over time even with the same throttle input) ---> Burble with stock exhaust as RPMs drop (may be normal IDK)
What i know:
- Bank 1+2 LTFTs 25-30% at idle, starts at 20-25 slight increase with throttle to a max of 30
- Bank 1+2 STFTs close to 0 at idle but increase greatly with throttle but drop to 8-10% holding at same RPMs
- 02 sensor values in normal ranges of each other and act with normal behaviour in response to throttle
- Normal LPFP and HPFP values
- Extreme Rough Idle in open loop and only slightly rough once in closed loop
- Spark plugs (Brand New) blackened after less than 20km (although car doesnt move from driveway and idles mostly)
- Spark plugs pulled and completely dry
Things already done
- PCV Valve replaced
- 6x Ignition Coils (Eldor)
- 6x Spark Plugs (OEM Bosch)
- Vanos Solenoids Cleaned
- Both MAP sensors "Cleaned" (Intake Manifold Sensor black even after cleaning in which it was covered in gunk)
Thankyou for your time and Thankyou for your help in advance
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What values are you getting for your AFR, HPFP and LPFP? Log would help. How are you checking these values?