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#1
11-08-2007, 02:08 PM
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OBD Code help
The codes with an Actron reader are: P1159 - Fuel trim additive bank 1 high P1161 - Fuel trim additive bank 2 high Codes with Peak R5/fcx 2 reader are: OF 1C - Mixture control, idle, Cylinder #1 to 4 OF 1D - Mixture control, idle, chlinder #5 to 8 In simpler terms, what is the problem. It would seem that there is too much fuel going to the injectors. Is this an easy adjustment? 
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#3
11-08-2007, 07:07 PM
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Good call.....but read on...
I found that one of the clips had broken on the air filter cover so it was sucking too much air there so I just used a screw to secure it tightly. Now I am sure that it is tight. It is not sucking too much air around the filter. When I did that I also got some MAF cleaner and cleaned the MAF just to be sure. I just get the codes listed now -- nothing on the MAF. I talked to a friend and he said it could be a vacume problem....sucking too much air through some source or vacume hose and the sensors in the exhaust are reading that the mix is not right in the exhaust so that is why I am getting the codes. Since it is on both sides it would seem that it is some sort of air problem. But I wouldn't know where to start looking for a vacume hose crack or problem. Any suggestions.
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#4
11-08-2007, 08:02 PM
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You should be able to hear the sucking noise if a liner is broken.
Is it possible the idle control motor is defective instead? 
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#6
11-12-2007, 03:58 PM
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Usually the Idle Air Control valve will throw a code when it is stuck one way or another, but you might unplug it and see if you still get those codes.
It is the device that controls the mix at idle, and when it does not work right your idle will be hell. It may be going out. Your computer is trying to add fuel to the mix, and the sensors say it is too high. That usually means that your mix is leaning out (too much air/not enough fuel) and the computer is trying to compensate. That is btw exactly what mine did. My IAC valve crapped out, which leaned out my idle and the computer added fuel to keep from blowing up the engine (lean = hot). Check out the IAC, but in general everything in the air delivery stream, behind the MAF. If air is getting in that is unmetered, that can cause situations like this. An exhaust leak before the 02 sensors responsible for fueling, or produce a lean read and trigger this response from the computer, but odds are you would hear an exhaust leak, and those 02s are in the cast iron manifolds which are not likely to crack or leak. Go over the intake system from stem to stern focussing on everything after the MAF, and check that idle control valve.
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2001 E53 3.0 5pd
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