| BMW Garage | BMW Meets | Register | Search | Today's Posts | Mark Forums Read |
|
|
|
  SUPPORT ZPOST BY DOING YOUR TIRERACK SHOPPING FROM THIS BANNER, THANKS! |
|||||||||
Post Reply |
|
|
Thread Tools | Search this Thread |
| 10-24-2016, 04:17 PM | #1 |
|
Lieutenant Colonel
 
323
Rep 1,804
Posts |
Slight surge under moderate throttle
I've been having a persistent annoyance with my Z4M where I'll give maybe 40% throttle in 2nd gear around 2000 RPM and after one or two seconds it feels like I just gave it 60% throttle and the car will surge. It's definitely not the linear power band I'm used to in the car - almost feels like turbo lag.
I read for codes and it's not pulling any. I'm not sure if it's VANOS solenoids, spark plugs, fuel filter or what. I cleaned the MAF not long ago and the problem persists. And the PO changed spark plugs about 20K miles ago, so I don't think they're faulty. 2006 Z4M, 82K miles
__________________
-Nick
2018 BMW 440i - M Sport, Exec Glacier Silver Metallic/Coral Red Dakota Retired: '00 323i, '06 325Ci, '09 135i, '06 Z4M Roadster, '93 525i, '76 2002, '14 X1, '14 M235i, '16 X4, '16 435i |
| 10-27-2016, 11:29 PM | #2 |
|
Captain
 
433
Rep 753
Posts |
A wild guess is potential issues with timing and it could be due to VANOS. I would get the VANOS exhaust cam hub inspected to ensure your tabs that drive the pump are intact. If it is the solenoid, I would have expected a bunch of codes ...
|
|
Appreciate
0
|
| 10-27-2016, 11:59 PM | #3 |
|
Major
 
111
Rep 1,351
Posts
Drives: in Anger.
Join Date: Sep 2010
Location: Newcastle, WA
|
Air filter? Type and when last replaced?
I have a AFS and it is very surgy
__________________
Gone (2006 STI, 2008 EVO MR, 1968 Mustang)
AFE Intake/Euro Cats/CSL Headers/Sportline CSL/H&R Springs 1217/1815 !!! BOILER UP !!! |
|
Appreciate
0
|
| 10-29-2016, 10:24 AM | #4 | ||
|
Lieutenant Colonel
323
Rep 1,804
Posts |
Quote:
 Quote:
__________________
-Nick
2018 BMW 440i - M Sport, Exec Glacier Silver Metallic/Coral Red Dakota Retired: '00 323i, '06 325Ci, '09 135i, '06 Z4M Roadster, '93 525i, '76 2002, '14 X1, '14 M235i, '16 X4, '16 435i |
||
|
Appreciate
0
|
| 10-29-2016, 11:30 AM | #5 | |||
|
Major
111
Rep 1,351
Posts
Drives: in Anger.
Join Date: Sep 2010
Location: Newcastle, WA
|
Quote:
__________________
Gone (2006 STI, 2008 EVO MR, 1968 Mustang)
AFE Intake/Euro Cats/CSL Headers/Sportline CSL/H&R Springs 1217/1815 !!! BOILER UP !!! |
|||
|
Appreciate
0
|
Post Reply |
| Bookmarks |
| Thread Tools | Search this Thread |
|
|
