Hi all,
I'm posting here to see if anyone had a similar experience and to see how they resolved the issue.
I got an 08 E85 Z4 3.0i N52 Auto with 83,XXX miles and no mods.
The issue initially started the day I picked up the car. While coasting down hill in a parking lot trying to do a U turn, the car suddenly shut off. Afterwards, the car kept on attempting to shut off when I come to a stop sign but drives really smooth otherwise. This was avoided by revving the engine a little to raise the RPM. Soon the SES light came on so I took it to the dealership, where the MAF sensor was replaced with a new one.
Few weeks later, I noticed the RPM needle slightly dipping below the normal 600 RPM range with the SES light returning. The diagnosis was issues in Bank 1 and 2. This time, I've went ahead and replaced all 6 spark plugs and coil packs per specification. However, the RPM dip and slight shudder issue kept returning.
Thinking this is related to a vacuum leak, I took the Z4 to my indy BMW mechanic and completed a smoke test, which did NOT reveal any leaks and performed some preventative maintenance: gasket cover seal replaced, and electric water pump and thermostat replaced. He even went as far as to get me a new MAF sensor to see if the dealership gave me a faulty MAF sensor as the diagnostics revealed that the codes thrown were due to MAF and Bank 1 and 2 running rich.
With the new MAF sensor in place, I've been driving about 100 miles. Yesterday evening, when I started the car, the RPM needle started to bounce up and down between 600 RPM and 1200 RPM and then leveled out at 600 RPM: Assuming the engine is trying to compensate and adjust for faulty air/fuel ratio. However, it drove fine for another 20 miles allowing me to get back home without the weird RPM bounce.
This morning, when I started the car, the RPM was fine. Then I tried to drive to work and car was running fine until I came to a red light. When I was idling at the stop light, the engine suddenly shut off very smoothly as if I turned the ignition off. I put the gear back into Park and started the car without any issues. Drove a little again to the second set of red lights, and when the car was idling it shut off again. Again restarted the car and drove back home, thinking I cannot drive to work in this LA traffic with the car stalling like this. While I was driving back home, I had couple of slight stops, but the car did not shut off (While waiting for the garage gate to open and right before parking). Also when I was backing into my parking spot, I did feel the RPM being a little rough in reverse gear.
Any ideas as to what may be causing this???
Definitely not a vacuum leak..but would it be logical to suspect CVV issue or is there anyone else who had the same experience?
Most recent issues:
1. SES Fault Code: MAF Sensor, Bank 1 and 2 running rich
2. Occasional slight RPM drop to 500 RPM then back at 600 RPM (once/day)
3. RPM bounce between 600 RPM - 1200 RPM (only once, then never agian)
4. Car running smooth, but then stalling while at idle (today)
Cleared out following causes:
Vacuum leak
MAF Sensor
Spark plugs/coil packs
**I do have a new battery (Interstate AGM)
Please helppp I'm getting very frustrated with the Z4
++++++++++++++++++++++++++++++++++++++++++++++++++ ++++++++++++++++++++++++
EDIT: I found this post and thought may be a DME update might help? Any thoughts?
I checked with the dealership and they told me I still have the original DME software.
http://ift.tt/1JhLZ4S
I'm posting here to see if anyone had a similar experience and to see how they resolved the issue.
I got an 08 E85 Z4 3.0i N52 Auto with 83,XXX miles and no mods.
The issue initially started the day I picked up the car. While coasting down hill in a parking lot trying to do a U turn, the car suddenly shut off. Afterwards, the car kept on attempting to shut off when I come to a stop sign but drives really smooth otherwise. This was avoided by revving the engine a little to raise the RPM. Soon the SES light came on so I took it to the dealership, where the MAF sensor was replaced with a new one.
Few weeks later, I noticed the RPM needle slightly dipping below the normal 600 RPM range with the SES light returning. The diagnosis was issues in Bank 1 and 2. This time, I've went ahead and replaced all 6 spark plugs and coil packs per specification. However, the RPM dip and slight shudder issue kept returning.
Thinking this is related to a vacuum leak, I took the Z4 to my indy BMW mechanic and completed a smoke test, which did NOT reveal any leaks and performed some preventative maintenance: gasket cover seal replaced, and electric water pump and thermostat replaced. He even went as far as to get me a new MAF sensor to see if the dealership gave me a faulty MAF sensor as the diagnostics revealed that the codes thrown were due to MAF and Bank 1 and 2 running rich.
With the new MAF sensor in place, I've been driving about 100 miles. Yesterday evening, when I started the car, the RPM needle started to bounce up and down between 600 RPM and 1200 RPM and then leveled out at 600 RPM: Assuming the engine is trying to compensate and adjust for faulty air/fuel ratio. However, it drove fine for another 20 miles allowing me to get back home without the weird RPM bounce.
This morning, when I started the car, the RPM was fine. Then I tried to drive to work and car was running fine until I came to a red light. When I was idling at the stop light, the engine suddenly shut off very smoothly as if I turned the ignition off. I put the gear back into Park and started the car without any issues. Drove a little again to the second set of red lights, and when the car was idling it shut off again. Again restarted the car and drove back home, thinking I cannot drive to work in this LA traffic with the car stalling like this. While I was driving back home, I had couple of slight stops, but the car did not shut off (While waiting for the garage gate to open and right before parking). Also when I was backing into my parking spot, I did feel the RPM being a little rough in reverse gear.
Any ideas as to what may be causing this???
Definitely not a vacuum leak..but would it be logical to suspect CVV issue or is there anyone else who had the same experience?
Most recent issues:
1. SES Fault Code: MAF Sensor, Bank 1 and 2 running rich
2. Occasional slight RPM drop to 500 RPM then back at 600 RPM (once/day)
3. RPM bounce between 600 RPM - 1200 RPM (only once, then never agian)
4. Car running smooth, but then stalling while at idle (today)
Cleared out following causes:
Vacuum leak
MAF Sensor
Spark plugs/coil packs
**I do have a new battery (Interstate AGM)
Please helppp I'm getting very frustrated with the Z4
++++++++++++++++++++++++++++++++++++++++++++++++++ ++++++++++++++++++++++++
EDIT: I found this post and thought may be a DME update might help? Any thoughts?
I checked with the dealership and they told me I still have the original DME software.
http://ift.tt/1JhLZ4S
HELP: N52 Engine Stall and Weird RPM Bounce
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