AFR Help
02-08-19, 08:15 AM
#1
Driver
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AFR Help
I noticed the other day when cruising if I begin to roll into boost in 4th or 5th gear the AFR stays pretty steady around 14.5-15 and will not budge all the way up to 1bar. When not in boost AFR is constantly
trying to stay around 14.7 and when I'm in a lower gear and begin to start boosting the AFR will richen up like normal, idle is also good on AFR 14.6-15. Now if I begin boosting and going through the gears when I go from 3rd to 4th the AFR will stay in the rich zone like it should but when already in 4th or 5th and begin rolling into boost it will not richen up for some reason. Could it be because I'm rolling into the boost at like 35-40% throttle and the TPS is not triggering it to change fuel however I thought the MAP would recognize the pressure and tell the ECU to increase fuel. On occasion when I go to start the car up after leaving the store or somewhere I drove to the AFR's will be on the lean side 16-17 at idle but if I blip the throttle it will correct itself and stay steady. No engine codes or performance issues. Thanks for any help in advance.
Mods:
Ariston ECU, S366, IS300 Coils, FMIC, FFIM, Q45 TB, AEM WB, 3" Exhaust, walbro 485 w/ 12v mod, Turbosmart WG, timing at 8 degrees, new fuel filter, HKS BOV, 440cc injectors, stock FPR, new spark plugs.
trying to stay around 14.7 and when I'm in a lower gear and begin to start boosting the AFR will richen up like normal, idle is also good on AFR 14.6-15. Now if I begin boosting and going through the gears when I go from 3rd to 4th the AFR will stay in the rich zone like it should but when already in 4th or 5th and begin rolling into boost it will not richen up for some reason. Could it be because I'm rolling into the boost at like 35-40% throttle and the TPS is not triggering it to change fuel however I thought the MAP would recognize the pressure and tell the ECU to increase fuel. On occasion when I go to start the car up after leaving the store or somewhere I drove to the AFR's will be on the lean side 16-17 at idle but if I blip the throttle it will correct itself and stay steady. No engine codes or performance issues. Thanks for any help in advance.
Mods:
Ariston ECU, S366, IS300 Coils, FMIC, FFIM, Q45 TB, AEM WB, 3" Exhaust, walbro 485 w/ 12v mod, Turbosmart WG, timing at 8 degrees, new fuel filter, HKS BOV, 440cc injectors, stock FPR, new spark plugs.
Last edited by suprasoup; 02-08-19 at 08:28 AM.
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