I have a Dodge Ram Gas powered 2500 with a v-10 in it, It is surging noticeably at highway speeds and gets even worse in city driving yet idles just fine. I was thinking fuel filter and a fairly easy inexpensive solution. However on calling parts store to price a filter I was informed that there is no in line fuel filter and that it is built into the fuel pump and is none serviceable calling for complete replacement of the fuel pump at a cost of $199. At that kind of expense I am looking for some other possible solutions to this problem
I'm not specifically familiar with your truck, but I would check with a dealer to ensure there is no inline filter before taking the part store's word for it. While most vehicles have a pick up filter in the tank for big stuff, I've never seen a car without an inline filter for micro-particulate. The part store you called may simply not carry it, or may carry a desk help person who doesn't know what they're doing (happens all the time). Other possible issues for your surging could be that you have a sticky injector that isn't opening/closing properly, that your automatic trans is acting up (if you have one), or a pressure regulator in the lines (my wife's car also does this because the part that is supposed to hold fuel pressure in the line is bad (as a result it starts hard unless you let the pump "prime" the pressure just before starting) and so it surges just a little with the fuel pump's cycling when driving at freeway speeds. I think you're on the right track with an inline filter though and would try that first.
SOURCE: 1996 Dodge Ram 1500 kept stalling while driving now won't start
First off you can test the fuel pump 2 ways
1.have a assistant turn on the ign to on while you listen for the pump to run at the gas cap (gas cap off).
2.find the valve on the fuel rail looks like a a/c or valve stem,take the cap off and press the needle and if fuel comes out then it's not the fuel pump.
But from a lot of EXPERIANCE on dodge engines the stalling and restarting issue is ignition related i.e crank or cam sensor which will throw a diagnostic code of engine misfire xxx cylinders.
So If its one of those sensors then you will not have any spark,and staring fluids will not fire the engine.
As for the headlights flickering they get there power through a relay straight from the battery,so I would look at the relays under the hood and find the one for the headlights and swap it out with the horn relay as most of the relays will have the same numbers.
The crank sensor is about 70.00 and the cam sensor is about 50.
depending on where you get them (dealer or aftermarket)
the cam sensor is the round plastic thing under the dist cap,and the crank sensor is on the pass side under the head into the top of the transmission bell housing and it's a 2hr job to change because of it's location is really hard to get to.
Hint -take the breather off and place a rag over the intake and a board from the radiator core support to the intake to lay on,it has 2 10mm bolts and the wiring harness unplugs from underneath.
SOURCE: replace water pump cost
the time to replace is 3.8 hours. multiply this by the shop flat rate and this will give you a labor rate. call some local parts houses to find the price on the pump, dodge gets around 98dollars hope this helps, depending on when you last changed the timing belt you ight want consider doing this at this time as it has to come off to change the water pump. this is an interference engige if the belt breaks it will damage the valves, you should only have to pay for the belt. hope this helps if not ghet back tome and i'll try to help you further. please rate my fix, as i strive to the best Thanks Ray
SOURCE: Where is Fuel Relay for 2004 Dodge Ram 3500 Diesel Truck
it doesn't have a fuel pump relay it has a fuel pump control unit and it is located on the chassis back quarter drivers side near the tube cross member for chassis on top of chassis rail near bed mount. locate the rear springs front perch and it will be above that on top of rail.
hope this helps. good luck and please ask any question you have.
Testimonial: "Thanx for info..no wonder I couldn't find Relay! "
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