11-27-2013, 10:56 PM
Join Date: Nov 2013
Location: cary, nc
Total Cats: 0
Bogging down while cruising. 9.5:1 AFR?
Ive been having issues recently with the car bogging down while cruising at a steady rpm. My wideband shows cruising around 13-14 then all of the sudden it will drop down to 9.5 10 to 1 and bog down a bunch. It literally throws you forward a little in your seat.
Other symptoms include:
Dying while idling
Engine cutting off from too low of an idle after revving and letting off
I am running a fuel management system and a timing controller. However this is under normal driving circumstances.
I was running the ecu off the widebands narrowband emulation, and I swapped it back to stock to see if it made any difference. It did not.
only running 3lbs boost
1.6L - good compression 155 across the board
JDM Sport FMU 12:1
MSD Ignition Unit
Anyone have a similar problem? Throttle position sensor? Vacuum leak?
Last edited by racoonfrenzy; 11-27-2013 at 11:39 PM.