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Old 03-23-2015, 04:40 PM   #1
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hope somebody can help me figure this out. So not to confuse you the problem is the MIL. The code is P1635 which my scanner tells me is a 5 voltage reference 1 circuit. this is just a autoscanner plus with code connect. when I look up top reported fixes they are replace fuel pump , replace map sensor , and repaired powertrain control module connector. In that order. so you know , while replacing the #6 injector in an attempt to solve a slight miss problem I have had since I bought the car 6 months ago, I unplugged the MAP and control mod, as well as broke and repaired a vacume line, and I also unplugged most everything in that area to get the back side fuel rail up far enough to R&R that injector. Well it did not solve the problem and now I have this code. Further more I have noticed my oil pressure gauge drops to 0 and back up to around 50 as well. the oil sender/ sensor was replaced a few months ago , but I replaced it again under warranty. I am not sure if I am acually loosing oil pressure or the gauge is reading incorrect. I think I need to start testing some wires to see which one I messed up but don't know where to start. so anyway if you have any thoughts on this and/or a wiring schematic that would be great.
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Old 03-30-2015, 09:58 PM   #2
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This code seems to be gone now but the oil pressure gage is still eratic?
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Old 03-31-2015, 05:50 AM   #3
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Best way to eliminate the gauge is to watch live data via a scanner and or hook a mechanical gauge up to the engine. The 2000+ Bonneville'* tend to have issues with the clusters.
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