I have a 1990 Ford e250 w4.9L. The front fuel tank gets vapor lock (vacume in tank because tank is not venting as fuel is removed) Started when the rear tank forced fuel from the return line

5

Asked by Jul 16, 2014 at 12:12 PM about the 1990 Ford E-250

Question type: Maintenance & Repair

1990 ford e250 with front/rear tank.  Tank switching valve malfunctioned ( has been replaced ) and sent returned fuel from the rear tank into a full front tank forcing fuel out somewhere at the top of the front tank.  Now when using the front tank it has vapor lock (creates a vacume because no venting takes place as fuel is removed).  Where is the venting done on the tank when fuel is removed; at the vapor canister?  The tank works ok if the gas cap is off.  Any ideas?  dfcmike@iserv.net

3 Answers

78,285

There is a valve in the top of the tank that provides venting into the canister purge system, but as it only happens on the front tank check for a damaged hose or crushed line as you will have to drop the tank to get to the valve.

5

Your answer was helpful and the problem is the front tank. I believe the vent valve may have been damaged by the rear tank forcing the return line fuel into a full front tank which forced the excess gas out through the vent valve and probably destroyed it in the process. Could you please e-mail me a drawning of the location of this vent valve, mabe a name or part number from ford and the best way to replace it, if I can get one. Thanks Mike

78,285

F67z9b593ca I believe is the engineering number, your ford dealer can convert it to a Ford part number. there are 2 way to access it, one way is to drop the fuel tank, the other is to take out all of the bed hold down bolts and raise and block the bed enough to gain access to the front tank. Be careful with either way. I use the tank drop method with a floor transmission jack.

Your Answer

Add photo

Related Questions

  • Where can I find a 16 gallon center tank for my 138 in wheelbase e250 or will the 18 gallon from the 124 in van fit? 1 answer

    I've been to several auto parts stores and looked on the net for hours. I bought a used 1990 econoline e250, 351v8 that obviously sat for awhile. When I changed the fuel filter it was full of rust an...

    1990 Ford E-250 3 Dr XL Econoline Cargo Van Extended

    -

    Maintenance & Repair

  • Fuel tank vent 1 answer

    Has a 3rd vent line that is not connect at filler assembly. Seems to connect to some vents on the fuel tank. Lately gas spits out of this line when hot. What are the vents for? Do they fail? What...

    1997 Ford E-250 3 Dr STD Econoline Cargo Van

    -

    Maintenance & Repair

  • I replaced the brake line on my ford cargo van and now it wont start. 2 answers

    I replaced the brake line on my van and now it wont start. I had to drop the fuel tank to replace the brake line. Is there something that I could have missed.

    1996 Ford E-250

    -

    Maintenance & Repair

  • problem with my 1989 ford e250 conversion van 1 answer

    I have just purchased a 1989 ford e250 conversion van. It has apparently been sitting for several years. The mileage is 59,000. It stops running after 5 miles. I have had it towed 4 times in the pas...

    1990 Ford E-250 3 Dr STD Econoline Cargo Van Extended

    -

    Maintenance & Repair

  • how to remove rear fuel tank completely 4 answers

    I have a 95 f150 I would like to remove rear tank and just run on the front one. The rear tank leaks and if I put gas in the front one it ends up in the rear tank. Any idea's.

    1995 Ford F-150 Eddie Bauer LB

    -

    Maintenance & Repair

E-250

Looking for a Used E-250 in your area?

CarGurus has 91 nationwide E-250 listings and the tools to find you a great deal.

ZIP:

Search Ford E-250 Questions

Ford E-250 Experts

#1 FordNut
FordNut
Reputation 190
#2 zzski
zzski
Reputation 100
#3 chassy
chassy
Reputation 80
View All

Related Models For Sale

Used Ford E-350
253 listings starting at $495
Used Ford E-150
164 listings
Used Ford Transit Cargo
59 Great Deals out of 18,807 listings starting at $10,099
Used Ford F-150
3,393 Great Deals out of 205,480 listings starting at $1,273
Used Ford F-250
552 listings starting at $1,977

Used Cars For Sale