Question about 1996 Ford Econoline

5 Answers

I have a 1997 Class C Damon motor home on a 1996 E350 chassis.. I have a low fuel volume problem, I have changed the in tank fuel pump and of course the fuel filter. The problem arises after driveing aout 25 miles, the speed will drop down to about 40 mph. If I shift into neutral and shut off the engine and start it right back up I can go another 10 miles or so, then it will do it again. I have put a pressure gauge on the fuel rail, when the problem arises the fuel pressure drops off when I try to raise the engine rpm, in gear or not, but comes right back up when at an idle. I have isolated this to a fuel problem by jumpering the fuel pump relay. The problem only goes away when the fuel pump is restarted,

Posted by on

  • 6 more comments 
  • jenhvac Sep 30, 2010

    Thanks for the responce, but I have tried driving it without the cap even on there and I have the same symptom. The filter has been changed at least four times, as that is the first thing everybody suggests. I have a pressure guage adapter that goes in where the filter fittings are and have ran it without the filter even in the line with the same results. I'm looking for some solution above and beyond the usual answer.

    Thanks again.

  • jenhvac Oct 01, 2010

    I have changed the line filter 4 or 5 times just to be sure that isn't involved, I have had the tank down 4 times, I had it flushed the first time and havn't seen any residue since. I haven't found any evidence that the lines are clogged and there are no bends or kinks. I can't figure out why shutting off the pump for an instant and turning it back on makes the problem go away temporarily. I have disconnected the fuel line from the fuel rail and jumped the pump relay and run 50 gallons of gas out of the tank and it never missed a beat. I guess I'm looking for someone who has run into this type of problem and did something other than change the fuel filter. By the way I have been doing my own automotive work for about 50 years so I'm pretty sure of my skills.

    Thanks for trying to help.

  • jenhvac Oct 01, 2010

    I have tried all the usual fixes for this problem. New pump,clean the tank, fuel filter, etc. I have isolated the fuel pump from the pcm by putting a jumper wire in place of the fuel pump relay, all with no improvement. I am looking for something outside the box or I would have figured this out myself. Thanks

  • jenhvac Oct 01, 2010

    This motor home has the 7.5L (460) Ford bigblock V8 if you read what I have already posted you will see that I have pretty much tried all the usual solutions. I'm stumped and was hoping someone out there in www land had seen a problem like this and had a solution. I will be happy to provide any other information I can to help find that solution.

    Thanks

  • jenhvac Oct 01, 2010

    This motorhome has a 7.5L (460) Ford bigblock V8 gas engine. THe biggest mystery for me is why does shutting the pump off for a second and turning it back on clear the problem for a while. I have had the tank down and the pump out twice since I installed it originally trying to find a reason for the fuel flow problem, but I can't find anything wrong. I went on Fixya hoping to get something new to look for but so far no luck.

  • jenhvac Oct 02, 2010

    The only "switch" in the fuel pump circuit is the fuel pump relay which I have bypassed with a jumper wire to see if there was a problem there. Everthing perforemed the same with the jumper in as it does with the relay in. The only other connection I can find is the plug back at the tank, I have crawled under there while the problem is occuring and found no hotspots or other evidence of a bad connection. When I shut the engine off and restart it it only off a couple of seconds, If it is something hot it wouldn't have time to cool off much. Like I said it has me stumped. Thanks

  • jenhvac Oct 02, 2010

    The reason I am calling it reduced flow is because the fuel pump does not stop pumping. it just stops pumping enough. At a low volume the proper pressure is maintained but when the engine needs more fuel the pressure drops to almost nothing. It does this whether the engine is under load or not.
    Thanks.

  • jenhvac Oct 03, 2010

    I haven't really checked those vacuum operated things because when I drive the motorhome with the fuel pump relay jumpered and the problem arises and i shut the engine off and restart it I still have the problem until I restart the fuel pump. I can't figure out what restarting the pump does. I have tried to reproduce the problem by running the pump sitting in a bucket of gas ( being very careful not to cause a spark) but it will sit there and run with no visible reduction in flow for hours. Very frustrating, but I hope to figure it out eventually.

    Thanks

×

5 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Master
  • 1,796 Answers

Hi!!
I have an 95 F350 7.5L dully. I had a problem, not as severe as yours, wasted too much gas and it felt as if I the parking brake was on. The difference is that my truck has an standard transmission and yours is automatic. Check your purge solenoid, the canister and the EGR valve, make sure all the vacuum lines are properly connected and not cracked or loose.
The problem could be vapor lock caused by excessive emission/exhaust gases not being properly routed and disposed of.
Also check the status of the dist. cap and rotor and the spark plugs.
Good Luck!!

Posted on Oct 02, 2010

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Master
  • 1,509 Answers

You discribe a stopped up fuel filter or a bad gas cap. If air can't get into the tank the fuel won't come out their is a canister purge soliod that may not be letting air into the tank. To test this idea remove the gas cap or put it on loosely and see if the problem goes away. restarting the fuel pump sort of sounds like a bad pump or an overheating pump as it tries to flow pash a stopped up fuel filter. the fuel pressure can be too high and cause this too but you say the pressure is normal and goes low.

Posted on Sep 30, 2010

  • John P Schwantes Jr Sep 30, 2010

    On the motor home the fuel lines may have been extended and the fuel tank itself may not be a ford part. all the lines need to be inspccted for bends and cloogged. being motor homes tend to sit alot the fuel tanks may accumulate water and rust, If the tank has a drain plug you may what to drain some of the fuel to see if water comes out. You may have to jack the car on anangle so that the plug is right at the lowest part of the tank, so sthe water will come out I'd still remove the fuel filter first as it can stop up quick with rust. If it's hard to blow though cut it open and see what's in it. You may have to change the filter more than once in the next little while. If it stoppes up more than once then take the tank down and get it clened or replace it with a new one. Be careful working on all fuel jobs as fire and getting fuel in your eyes are something to avoid. Get professional help if your unsure of your skills.

×

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Expert
  • 2,973 Answers

After having read all your comments, I feel that it is not a mechanical fault. It is an electrical fault. Meaning that after you have driven the vehicle for about 25 miles, something gets heated up and lowers the current to the pump. When you switch it off for a moment it cools a little and gives you 10 more miles. Could it be the switch that has a loose connection?

Posted on Oct 02, 2010

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Ford Master
  • 17,970 Answers

We dint know exactlty what engine sizes there? 6.0L or 7.3L Diesel. Keep in mind that its possibe that you need check several thnigs there:

Idle Speed Adjustment
6.0L Engine
The fuel system is controlled by the PCM.

7.3L Engine

  1. Place the transmission in Neutral (manual transmissions) or P (automatic transmissions).
  2. Bring the engine up to normal operating temperature.
    NOTE Idle speed is measured with the manual transmission in Neutral or the automatic transmission in D .
  3. Ensure that the curb idle adjusting screw is against the stop. If not, correct the vehicle linkage.
  4. Check curb idle speed. Curb idle speed is specified on the Vehicle Emissions Control Information (VECI) decal on the underside of the vehicle's hood. Adjust the idle speed to specification using the idle speed adjusting screw.

    I have a 1997 Class - 9537d61.jpg

    Fig. Raise or lower the curb idle speed by turning the curb idle speed adjusting screw-7.3L diesel engines

  5. Place the transmission in Neutral (manual) or P . Rev the engine momentarily, then place the transmission in the specified gear and recheck the idle speed. Adjust again if necessary.
  6. Remove the tachometer and close the hood.

Also if its possible, check (drain) the Fuel Condition Module, this device contains the fuel pump and water separator (on Diesel engines).
Its possible that your problem isn't the fuel pump or fuel filter (you comment that this is new), I suggest test injection system, any problem with the Fuel Pressure Regulator, Fuel Injector Control Module or finally with the Fuel Injectors.

Keep us updated. Hope helps.

Posted on Oct 01, 2010

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Expert
  • 4,070 Answers

HI! You may want to replace the PCM (powertrain control module). The PCM has connectivity on all electrical system that runs inside the car including the engine, transmission, accessories, etc. If the PCM is faulty something will surely fails and one of those is your fuel supply. Have it replaced and you'll be good. HOpe this helps and thank you for using FixYa!

Posted on Oct 01, 2010

  • dj_relly999
    dj_relly999 Oct 01, 2010

    Hows it going?

×

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Fuel pressure


Well most engines have a mechanical pump on the engine, but the E350 models used for motor homes and box vans also use an electric pump in the tank. The pressure rating is still 5-8 psi like the mechanical pumps.
Have you replaced the inline filter ?

Mar 11, 2014 | 1987 Ford Econoline

1 Answer

Cannot accelerate 1987 E350 motor home


If it idles but bogs when the accelerator is pushed, it has carb issues(if it has been sitting for a long time probably has carb issue) or low fuel pressure. If its low fuel pressure then it could be a bad/clogged fuel filter, fuel flow problems from the tank to the fuel pump, or a bad fuel pump.

Aug 05, 2012 | Ford Cars & Trucks

2 Answers

I have a 1984 class c motorhome on a ford e350 frame. I have no fuel at the carb. I pulled the output line on the electric fuel pump in the rear of the vehicle. ran the pump; no gas. I pulled the input...


I know this might sound odd but try replacing the ignition switch. I have a 86 c class e 350 and could not get the front fuel pump to run for the longest time. After changing everything else, I decided to change the ignition switch, and believe it or not the front pump came on and started working the way it is supposed to.

Jul 07, 2011 | 1983 Ford Econoline

2 Answers

I have a 2002 V10 ford chassis motorhome. Took it in to have exhaust manifold bolts replaced. Now will not start. No fuel. You can hear the fuel pump running but when cas line opened at inline filter under...


There is a strainer filter attached to the fuel pump in the tank however you really need to see how much gas is actually in your tank first. Sounds like a fuel line may be pinched.

Jun 04, 2011 | 2002 Ford E350

1 Answer

Where is the fuel pump located on the 1990 E350 van chassis?


there are two fuel pumps, the 1st is inside the fuel tank, the high pressure pump is inside the frame rail on the drivers side just bleow and aft of the driver seat, this is gas engines only.

Oct 17, 2010 | 1990 Ford F250

2 Answers

Ford 460 loses power then dies. Starts back up. Idles fine.


It sounds like you might have a clogged catalatic converter on the exhaust system.

Apr 23, 2010 | 1999 Ford Super Duty F 450

1 Answer

How to fix a fuel pump on 1996 e350


The pump is in the fuel tank.The tank has to be lowered enough to replace the pump.

Sep 25, 2009 | 1996 Ford Econoline

1 Answer

1987 Fleetwood 26C motorhome is on a Ford E350 Starting Problem


if it was me i would start with a new fuel filter and some STP gas treatment if you let it sit for a long time there maybe water in the gas tank and try these websites to see if they have your motorhome listed its www.autozone.com and the other one is www.alladtadiy.com if all fails stop by your local library and get your hands on a Haynes auto repair manual for your motor home

Jun 07, 2009 | Ford E-350 Cars & Trucks

2 Answers

Fuel pump does not work- 1999 ford super duty class a motorhome


Check your vehicles safeties. Your ECM is probably programed for engine shutdown if it senses low oil pressure or low coolant level. Do a preliminary check.

Apr 28, 2009 | 1999 Ford Super Duty F 550

Not finding what you are looking for?
1996 Ford Econoline Logo

226 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts

yadayada
yadayada

Level 3 Expert

75824 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

fordexpert

Level 3 Expert

5501 Answers

Are you a Ford Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...