while on the highway oil pressure on edge was dropping to zero and then jumping back up to 20 or so, mechanical gauge was doing it to. If this was the oil pump I think that it would not drop and go back up so fast. Also my water in fuel light is on, but I have the fass system installed so that sensor is not there. Yes I checked the oil level

 

If a mechanical gauge is dropping to zero, there's a problem somewhere.
Or are you refering to the gauge in the instrument panel? (that's a electronic gauge with a sender)

Could be a leak/low oil level, could be a bad filter, could be a pump.

What oil filter are you using?
(reason I ask is I had the same problem on a 318 gasser years ago when I used a FRAM filter for the 1st and LAST time )

 

got it towed home Hooked up mechanical gauge lots of pressure. Now the problem is my check engine,water in fuel,and oil pressure lights are on. When I accelerate at normal speeds it stumbles. I believe these all run through the pcm is it possible and how do I check if this is the case.

 

they are run theru the pcm i would check the wires coming from those sensors and make sure they are not shorting somewhere

 

Be sure to check all the grounds too, that looks a whole lot like a ground problem

 

You could have two problems. Your oil pressure sender. (known problem area) and you could actually have water in your fuel. Take a sample and see.

 

took it to the dealer to get the codes. Turns out the edge module was shorting out. When I unplugged the map sensor from the edge and just hooked up the original connector it bypasses the edge and runs stock. Have to send it in to get fixed

 

Thanks for posting the culprit and fix action.

That will hopefully save someone else a few headaches in the future.

 

Good advice! His symptoms are pretty much identical to mine (also posted in 'Help'). I had the wiring diagrams out yesterday, and grounds are just abou the only thing common to these symptoms.