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First I'm new here and would like to say hi. Second my 96 ram 4x4 5.9 v8 news a fuel pump checked rockauto.com and was gonna order it because they are about 100$ less on rock auto but they were asking if it was 4 or 6 pin electrical connection. I like to take stuff apart and put it right back together with no delay. I was wondering if anybody had any input on this. Thanks
It is a 4 pin. You have pump power, sender unit power, ground, sender unit signal out. The newer ones are 6 pin because they have fuel pressure sender and a low fuel warning light, and the sensor for that is in the tank.
 

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Fixed the vacuum leaks but truck still threw the same 2 codes I'm kinda confused how is it both rich and lean in bank one bad injector?
Could be a bad injector, could be a misfire... Although, if it was a misfire you would likely have a misfire code (1996+ years). See without a professional scan tool so you can run tests, it is hard to diagnose anything. A vacuum leak, fuel injector, valve, you name it and it could possibly cause it. I could go remove the plugs and see if there are any that are fouling up. Here is a chart, you can find which cylinder is running rich or lean http://4.bp.blogspot.com/-j0zzs4Ml8...ACt8/Z--jY0NwoDs/s1600/Spark+Plug+Reading.jpg
 

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So when it says bank one its refering to all 4 cylinders on the drivers side so in theory one could be rich and one could be lean and give me both codes. Its strange though cause its running so smooth.
Yup, a bank is a row of cylinders. Bank one is usually cylinders 1-3-5-7, and bank two is usually cylinder 2-4-6-8.
In theory yes one could be rich and the other could be lean. I would try and get a professional scan tool, an MT2500 would be the best. I have one and it is helpful. If you have this tool it can help you figure out if this is possibly a worn out oxygen sensor issue, maybe a issue with misfire. With the tool it has a misfire counter built in. So you can find out in the drop of a hat if it is misfiring. Just without any tools you have to inspect plugs and have a good ear to listen for misfires. Usually misfires sound somewhat like a pinging. Only it is a bit more faint. There is a special tool that is used to check for a misfiring injector, the tool is expensive but it works similar to an A/C current detector (just like electricians have). The pro scan tool isn't the end all, but it really helps point you in a direction. If the engine is controlled by a computer, the best place for information is the computer...

Anyways, check the plugs, see if something is rich or lean. Then you can mark that cylinder and figure out if it is fuel related for possibly spark related. Since you have had problems with the fuel pump my guess is that you have something fuel injector related. Possibly a sticking injector or something. If you can find out which cylinder is having a misfire you could rule out fuel injector by swapping the suspect injector with the neighboring injector and see if that neighbor cylinder misfires as well.
 
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