Fuel Gauge Problem? Other Problems.
Hows it going guys?
1998 Ranger XLT
Anywho, so i'm starting to slowly go through my truck. There are a few things that i could really use some assistance with. I'll start off with the Fuel Guage reading. Anyways, my fuel gauge has always been off. I will fill the truck up and the pump will kick off, leaving my gauge between 3/4 and full. I always thought it was the sending unit. The previous had replaced the sending unit and pump assembly right before i got it from them. So today, i decided to see if my tank was actually full. So i went to the gas station, and put some gas in. Keep in mind, the tank was just filled up, to where the pump kicks itself off. I began filling it some more and it would kick off every .50 or so. I kept going until i out about 2 more gallons in it. Once back in the truck, the gauge actually read full! So my question would be, whats kicking it off prematurely and not letting my tank get filled all the way? I mean it seems like it kicks off about 1.5-2 Gallons too early. Would it possibly have something to do with the Evap hoses back there? maybe something kinked or crudded up?
Next up would be my rear-end noise. Around 15MPH i can hear a shearing sound coming from between the center of the vehicle to the rear. I cannot pinpoint it. I've had it on the lift and had the drums and tires of while the vehicle was set on cruise control. It seemed to get really bad around 40MPH and you could really hear it. I'm starting to get vibration around that speed on the highway. I've checked the balance of the tires and they are all good. I did a rear-end flush about 5 months ago and didn't notice anything abnormal. Could it be a pinion bearing or wheel bearing? I've tried moving the driveshaft around to check for play, and it seems to be within spec (hardly any movement).
Thirdly- I'm getting the dread PO171 and PO174, I'm luckily shooting to do the Upper and Lower Manifold gaskets tomorrow. My question being, how many of you guys actually just replaced the Upper Gaskets and had good luck with that being your problem? I've already ran a smoke machine on it, and replaced my intake tubing because it had a tear in it, but it didnt fix the problem. I recently replaced the EGR tube as well. I did notice the Valve Cover gaskets were getting a little seepy, so it may be a good idea to just do the whole shabang. I have all the gaskets needed.
Sorry for the book, but hopefully someone has some guidance. I've searched through numerous posts, but none really answered my direct questions. Thanks guys.