i saw my wideband it 15.7 on wot which i know is way to lean but i didnt think a motor would stay together at the a/r any other opinions? i figured maybe the wideband didnt have a good power source so i hooked it directly to the battery and then it said 14.9. got walbro,550,lexus afm, upgraded ct26 3 in turbo back exhaust.
wideband says lean
- Thread starter boostaddict
- Start date
The smallest of exhaust leak (upstream) will cause a bad reading. You have a fuel pressure regulator?
and where is the wideband located in the exhaust? right next to the turbo? replaced the OEM o2 sensor? 36inches away?
no i dont have an afpr cause with what i was doing i told that i wouldnt need one, but i do have a good paycheck coming to me and that was going to be my next purchase.at a cruise the wideband fluctuates between 14.4 and 15.2. i put the wideband about 36in away from the turbo, it is at the bottom of the downpipe at the bend just before where the cat should be. and as for an exhaust leak would that really screw with the reading since the air hitting the sensor should still have the same mixture, cause its not like there is new air coming in again im just thinking here could just be me but thanks for your guys input.
o and i just got finished checking the plugs they look good they are the golden brown color which youd think if theyd be clean metal if it was running as lean as this wideband says it is
If it was super lean they would be white, youll never get a plug to stay "clean". Well without water injection.:naughty: If there is an exhaust leak it lets fresh air into the exhaust stream which throws off the wideband. I wouldnt think a leak would affect it at wot though due to the amount of exhaust flow?
also does anybody know where the vacuum line under theaccordian hose comes from. i noticed a vacuum leak today and found that that hose is nowhere to be found
hvyman;1156267 said:
that's a vsv(vacuum switching valve)
and yes exhaust leaks pre sensor will effect the reading