Injector Pulse Width and O2 sensor readings Question
10-26-2004, 11:55 PM
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Injector Pulse Width and O2 sensor readings Question The car (in sig) has been down on power recently (runs consistently 2 mph slower in the 1/4 in better conditions). After doing some scanning with HP Tuners, I have found the following:
At WOT, the IPW for bank 2 is around 12.5-13.2 and the IPW for bank 1 is consistently ~ .5 MSEC less than bank 1. Also, the O2 readings (albeit they aren't all that accurate) on bank 2 will stay steady around 930mv and bank 1 will hold 880-930 for a split second, then drop down to as low as 100mv and stay there for the rest of the WOT pull.
Am I correct that bank 1 is running considerably leaner than bank 2? I know the O2 sensors aren't the best thing to reference when looking at a/f ratios, but bank 1 drops off to 100 or so mv on almost every WOT run while bank 2 remains around 900 or so.
I extended the O2 wires myself and I'm thinking this may be the source of this problem. I would think that bank 1 leaning out like that could cause the decrese in performance and the O2 extension may be the problem. I will be installing Caspers O2 extensions tomorrow but I wanted to get some feedback from you guys. I'm somewhat new at tuning so any help is appreciated. Thanks.
At WOT, the IPW for bank 2 is around 12.5-13.2 and the IPW for bank 1 is consistently ~ .5 MSEC less than bank 1. Also, the O2 readings (albeit they aren't all that accurate) on bank 2 will stay steady around 930mv and bank 1 will hold 880-930 for a split second, then drop down to as low as 100mv and stay there for the rest of the WOT pull.
Am I correct that bank 1 is running considerably leaner than bank 2? I know the O2 sensors aren't the best thing to reference when looking at a/f ratios, but bank 1 drops off to 100 or so mv on almost every WOT run while bank 2 remains around 900 or so.
I extended the O2 wires myself and I'm thinking this may be the source of this problem. I would think that bank 1 leaning out like that could cause the decrese in performance and the O2 extension may be the problem. I will be installing Caspers O2 extensions tomorrow but I wanted to get some feedback from you guys. I'm somewhat new at tuning so any help is appreciated. Thanks.
10-27-2004, 12:49 AM
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Originally Posted by luv2spd
Well I would definately try new 02 sensors and new extensions on the wires. Were you getting some kr?
10-27-2004, 01:01 AM
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Originally Posted by luv2spd
This in itself could cause most of your loss in the 1/4.
Guess I'll find out tomorrow.
