Enforcer
Just like the title says, on hard acceleration, the power delivery isn't smooth like it should be. It's really herky jerky (its almost like the tires lose traction then regain it). It feels like the car is tripping over its own feet when accelerating. Power below 3k RPMs is pretty weak and when you hit 3k it kicks in, albeit not smoothly.
At first I thought it was from the cold weather, but now its around ~60 degrees outside and its really getting on my nerves
Any thoughts?
03 TiAg 330i ZHP-Alex
Boss
Vanos would be a prime suspect for me.
Had yours had the DME update?
-Be yourself; everyone else is already taken.
ZHP Pre-Ride Briefing
2005 ZHP, Alcantara, Silver Cube, Nav, Sharked, BMW Perf Intake, BMW Perf CF Strut Brace, CF Valve/Fuel Rail Covers,
Shadowline Grills, CF Splitters, Fog Light Inserts, Euro-mirrors, CDV Delete, Beisan vanos, GAS DISA, BP Coded
Enforcer
Does it feel like your clutch is slipping?
Vanos would be guess #1
-JJ
2005 Zhp Sedan (Sold), back in the 2004 Allroad 2.7t
Capo di tutti capi
Try to move.....from a stop.......in 6th gear. If you can...it probably isn't the clutch
Call Me Dane l 2/2004 330i ZHP l 18x8 ET45 BBS CK's wrapped with Michelin Pilot Sport AS3+ @ 245-40-18 l KW V1 Coilovers in front l KW V1 springs w/ Bilstein B8 dampeners in rear l BMW Performance Rotors l UUC StrutBarbarian l Racing Dynamics Rear Strut Bar l Jim Conforti Shark Injector l Light Birch Interior Trim l Bimmian Celly Mount l M3 Trunk Mat l l e90 Performance E-Brake & Shift Knob l M3 Tri-Stitched Boots l AL Headlight Retrofit with ZKW Lenses l CobyWheel Wrap w/M3 Stitching l LCM sw 4.5 triple blink and rear fogs l Maple Interior Trim
Enforcer
As far as I know, the DME has never been updated. I'm still waiting on BMW of Manhattan to send me the PO's maintenance records
The clutch feels fine, I don't think its slipping. I did the test where you go 30mph, put it in 6th and floor it. RPM's didnt shoot up, they just gradually climbed as I gained speed, so I think the clutch is OK.
VANOS is my prime suspect also. I never noticed how loud it was until I was able to drive with my windows open yesterday, its actually pretty embarrassing how loud it is. Another thing I noticed when I had my windows open was a high pitched whistling sound when accelerating at low RPMs (I'm thinking torn lower intake boot?). Maybe the VANOS, DME, and this whistling are all related?
Thanks for the help fellas.
03 TiAg 330i ZHP-Alex
Boss
Whistle could very well be the boot. Certainly would contribute to your acceleration problem as well.
-Be yourself; everyone else is already taken.
ZHP Pre-Ride Briefing
2005 ZHP, Alcantara, Silver Cube, Nav, Sharked, BMW Perf Intake, BMW Perf CF Strut Brace, CF Valve/Fuel Rail Covers,
Shadowline Grills, CF Splitters, Fog Light Inserts, Euro-mirrors, CDV Delete, Beisan vanos, GAS DISA, BP Coded
Enforcer
Torn intake boots, Vanos, and DME can all create that bogging/hesitation through the power band. The whistling sound however, is usually traced down to a torn lower intake boot.
BMW 330i / Silbergrau / Zhp / 6 spd manual
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Torn intake boots would, however, most certainly cause a lean condition, therefore, most certainly prompting a code and SES light.
Call Me Dane l 2/2004 330i ZHP l 18x8 ET45 BBS CK's wrapped with Michelin Pilot Sport AS3+ @ 245-40-18 l KW V1 Coilovers in front l KW V1 springs w/ Bilstein B8 dampeners in rear l BMW Performance Rotors l UUC StrutBarbarian l Racing Dynamics Rear Strut Bar l Jim Conforti Shark Injector l Light Birch Interior Trim l Bimmian Celly Mount l M3 Trunk Mat l l e90 Performance E-Brake & Shift Knob l M3 Tri-Stitched Boots l AL Headlight Retrofit with ZKW Lenses l CobyWheel Wrap w/M3 Stitching l LCM sw 4.5 triple blink and rear fogs l Maple Interior Trim
Boss
Mine was weird on the 325 though, Dane-- I had just enough of a tear to get a high RPM whistle, but never threw a code--
leaning it a little, but just short of lean enough to trigger it I guess.
-Be yourself; everyone else is already taken.
ZHP Pre-Ride Briefing
2005 ZHP, Alcantara, Silver Cube, Nav, Sharked, BMW Perf Intake, BMW Perf CF Strut Brace, CF Valve/Fuel Rail Covers,
Shadowline Grills, CF Splitters, Fog Light Inserts, Euro-mirrors, CDV Delete, Beisan vanos, GAS DISA, BP Coded
Capo di tutti capi
Did yours stumble and drive like poopy?Originally Posted by kayger12
Call Me Dane l 2/2004 330i ZHP l 18x8 ET45 BBS CK's wrapped with Michelin Pilot Sport AS3+ @ 245-40-18 l KW V1 Coilovers in front l KW V1 springs w/ Bilstein B8 dampeners in rear l BMW Performance Rotors l UUC StrutBarbarian l Racing Dynamics Rear Strut Bar l Jim Conforti Shark Injector l Light Birch Interior Trim l Bimmian Celly Mount l M3 Trunk Mat l l e90 Performance E-Brake & Shift Knob l M3 Tri-Stitched Boots l AL Headlight Retrofit with ZKW Lenses l CobyWheel Wrap w/M3 Stitching l LCM sw 4.5 triple blink and rear fogs l Maple Interior Trim
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