Throttle oscillating? - BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)

pearlwhites · 07-14-2012, 02:45 AM

Hey folks,
Is anyone out there experiencing throttle oscillation when trying to cruise at constant speed? I recently installed a p3 gauge and a helix intake, and I'm wondering if I created a boost/vacuum leak.

Example: cruise control on at 70mph, level highway, throttle guage fluctuates between 22 and 24 constantly, resulting in noticeable jerking.

Thanks for any input!

robertm · 07-14-2012, 07:56 AM

Sounds like you have a leak. I'd check intercooler hoses

pearlwhites · 08-04-2012, 07:04 PM

Update: Turns out it was 2 bad primary O2 sensors... Related codes 2C39 (driver-side) and 2C3A (passenger-side).

07-14-2012, 02:45 AM	#1
pearlwhites First Lieutenant Drives: 1M, 06 CTT, 07 A8L Join Date: Mar 2007 Location: NY Posts: 381 iTrader: (3)	Throttle oscillating? Hey folks, Is anyone out there experiencing throttle oscillation when trying to cruise at constant speed? I recently installed a p3 gauge and a helix intake, and I'm wondering if I created a boost/vacuum leak. Example: cruise control on at 70mph, level highway, throttle guage fluctuates between 22 and 24 constantly, resulting in noticeable jerking. Thanks for any input!
	Tweet

08-04-2012, 07:04 PM	#3
pearlwhites First Lieutenant Drives: 1M, 06 CTT, 07 A8L Join Date: Mar 2007 Location: NY Posts: 381 iTrader: (3)	Update: Turns out it was 2 bad primary O2 sensors... Related codes 2C39 (driver-side) and 2C3A (passenger-side). Last edited by pearlwhites; 08-08-2012 at 04:03 PM.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

07-14-2012, 07:56 AM	#2
robertm Captain Drives: BSM 1M Join Date: Oct 2007 Location: dfw Posts: 730 iTrader: (0)	Sounds like you have a leak. I'd check intercooler hoses