O2 Sensor problem and questions
07-11-2009, 06:26 PM
#1
O2 Sensor problem and questions
I have searched the forum and not found what I am looking for (my problem is different) My 02 seems to be running well but there are a few fueling issues. I am getting low voltage codes P0131 and P0151. I do use racing fuel in this truck sometimes 104 unleaded but most the time 110 leaded fuel. I have LPP long tubes and about 18-24 in of pipe and a turn down that is it on each side. (this truck does not see street time) My questions are what can be the issue with the O2's do I need to replace them and if so I have noticed a few people are using the vette rear O2's because of the longtubes these are the part numbers I have, The OE type is Bosch P/N 13111 and the Universal is Bosch P/N 15732. I am getting 8* of timing retard due to knock. My wideband is not of much use because it is showing rich conditions but Justin of black bear thinks it may be lean. I am just trying to see if the O2's are bad and if so should I replace them with either of the vette part numbers? or use the standard OEM for the truck?
07-12-2009, 09:38 AM
#3
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Well the race fuel doesnt help the 02's but it seams odd your wide band is reporting rich and you are seeing kr. is it audible? Also if you dont drive it on the street why not go Open loop?
07-12-2009, 10:00 AM
#4
I really don't have an answer as to why I am not running in open loop, but I do know Justin wanted try and keep the narrow bands for now. I am just not good enough with EFI Live to make adjustments as needed in open loop at this time as well. I know the race fuel is not good for them but it should not crap out on the first go huh?
07-12-2009, 10:10 AM
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if your running race fuel and it's not street driven, then go MAF only open loop or go SD. I run open loop MAF only now and mine is a DD runs great and dont have to worry about the flippin o2's not reading right all the time.