Page 2 of 4 FirstFirst 1234 LastLast
Results 11 to 20 of 37
  1. #11
    Silver Member
    Join Date
    Mar 2010
    Posts
    194

    Default Re: help troubleshootinf pickup, 91 f150 6cyl

    Speed density injection systems need an RPM input butt I can't remember where they get it.

  2. #12
    Silver Member
    Join Date
    Mar 2010
    Posts
    194

    Default Re: help troubleshootinf pickup, 91 f150 6cyl

    I don't think the pump is your problem, but it would be helpful if you could check fuel pressure. I think the port is on the back of the fuel rail, looks like a tire valve.

  3. #13
    Elite Member Tig's Avatar
    Join Date
    Oct 2006
    Posts
    2,522
    Location
    The County, Ontario, Canada
    Tractor
    Kubota, B7100HST-D

    Default Re: help troubleshootinf pickup, 91 f150 6cyl

    How old is the fuel?
    Steve

    The best things in life are not things.

  4. #14
    Super Star Member LD1's Avatar
    Join Date
    Apr 2008
    Posts
    11,358
    Location
    Central Ohio
    Tractor
    Kubota l3400

    Default Re: help troubleshootinf pickup, 91 f150 6cyl

    Not sure on the 91's, but the 89's had THREE fuel pumps. One in each tank and ONE on the frame rail under the drivers side floorboard. So thats worth a look there.

    As to the pump switching off, When just cycling the key, yes I think it switches off after a few seconds. Now I dont know if that is on a timer or a pressure switch, but i think it is a timer cause even if you cycle real fast it always seems to run the exact same amount. But I dont know for sure.
    ".........there is only one way to find out."
    "Ok, hold my beer and watch this.........."


    Ford 5500 Backhoe
    Kubota L3400GST W/LA463 FEL
    2005 Dodge 3500 4x4 Diesel
    8N Rebuilt and restored
    Bushhog 306
    3 Homemade wood hauling trailers
    Dolmar 6400 84cc ported
    Sachs-Dolmar 120SI Ported
    (4) Sachs-Dolmar 116SI Ported
    Dolmar PS540
    Sachs-Dolmar 115i
    Sachs-Dolmar 117
    Sachs-Dolmar 112

  5. #15
    Bronze Member
    Join Date
    Mar 2002
    Posts
    91
    Location
    East Texas

    Default Re: help troubleshootinf pickup, 91 f150 6cyl

    Quote Originally Posted by Tig View Post
    How old is the fuel?
    1+ on that

  6. #16
    Bronze Member
    Join Date
    Jun 2011
    Posts
    71
    Location
    Enfield, CT
    Tractor
    Kubota B7100

    Default Re: help troubleshootinf pickup, 91 f150 6cyl

    Any possibility of a vacuum leak on a hose that an animal may have chewed?

  7. #17
    Elite Member SPIKER's Avatar
    Join Date
    Jun 2002
    Posts
    4,677
    Location
    Ohio, Jeromesville, Ashland County
    Tractor
    Jinma 284

    Default Re: help troubleshootinf pickup, 91 f150 6cyl

    Hey Guys:

    Pulled the truck inside (raining for 4 or 5 days straight now) but had forgotten the fuel pressure tester kit in trunk of womans car so no go on the testing today.

    The gas is older but should be fine. cleaned & re-gapped the plugs all seemed good (except one I broke getting it out.)

    I had pulled & repaired the wiper switch prior to moving it to where it was parked when it failed to start. One of the things I'm going to look at is to be sure I didn't knock something loose under dash or behind switch as it sets right above fuse panel.

    took about 5 tries of re-firing it to get it to move enough to go into barn.

    The 1990 was 1st with in-tank HP pumps not the older low pressure in-tank pumps and external high pressure pump.

    I am worried there could be a chew mark or wire somewhere as the spot I parked it was higher grass...

    tomorrow I'll be stopping out to hopefully dry truck to work on it.

    Mark
    I may remember why I went to the other end of the shop, I'm just afraid once I get there I'll forget how to get back!

  8. #18
    Veteran Member deerefan's Avatar
    Join Date
    Aug 2005
    Posts
    1,617
    Location
    louisiana
    Tractor
    1952 8N, 2005 JD 5103

    Default

    Quote Originally Posted by SPIKER
    Hey Guys:

    Pulled the truck inside (raining for 4 or 5 days straight now) but had forgotten the fuel pressure tester kit in trunk of womans car so no go on the testing today.

    The gas is older but should be fine. cleaned & re-gapped the plugs all seemed good (except one I broke getting it out.)

    I had pulled & repaired the wiper switch prior to moving it to where it was parked when it failed to start. One of the things I'm going to look at is to be sure I didn't knock something loose under dash or behind switch as it sets right above fuse panel.

    took about 5 tries of re-firing it to get it to move enough to go into barn.

    The 1990 was 1st with in-tank HP pumps not the older low pressure in-tank pumps and external high pressure pump.

    I am worried there could be a chew mark or wire somewhere as the spot I parked it was higher grass...

    tomorrow I'll be stopping out to hopefully dry truck to work on it.

    Mark
    Check your throttle body for excessive carbon buildup. Also, if your truck has one, check the throttle position sensor. Any codes?

  9. #19
    Elite Member SPIKER's Avatar
    Join Date
    Jun 2002
    Posts
    4,677
    Location
    Ohio, Jeromesville, Ashland County
    Tractor
    Jinma 284

    Default Re: help troubleshootinf pickup, 91 f150 6cyl

    Deerfan: the check engine light is on now, it showed up on the last time it was running on way home. My code reader is messed up so not sure what is up with it (or the ECM) I'm waiting for SANDY to get out of the way so I can get back working on it. I'll hook up y analog meter and try testing it that way to see what code it has up.

    throttle body was clean, had intake ducting off when I cleaned plugs

    Mark
    I may remember why I went to the other end of the shop, I'm just afraid once I get there I'll forget how to get back!

  10. #20
    Elite Member SPIKER's Avatar
    Join Date
    Jun 2002
    Posts
    4,677
    Location
    Ohio, Jeromesville, Ashland County
    Tractor
    Jinma 284

    Default Re: help troubleshootinf pickup, 91 f150 6cyl

    Hey Guys: did a bit of work on it today,
    Fuel Pressure is perfect with a NEW Pressure Regulator (was probably fine prior but did not put OLD one back On)

    Pressure held for a good time like it should. Ran pumps independently of each other and both were same/good pressure. One of the pumps sounds a bit worse than the other but functioning.

    I pulled ECM (Power systems modal) and confirmed pumps did not run and check eng light went of. Tried to jumper test the modal for codes but it will not respond to testing procedure and would not test with the FORD specific OBD1 tester I have. The Engine will RUN if a shot of ether is used to start the engine. it however has little or no power. I'm now thinking maybe the ECM may be bad? I THINK the fuel injectors fire in 2 sets 3 & 3 at same time so maybe only 1/2 of them are firing???

    Next testing will be on the Injectors to see if any of them are ON/OFF the right way or not... Anyone know best/easiest way to test them?

    How about the fuel Pumps no one answered if they are supposed to only start and stop when Pressure is UP.? As they run NOW they stay running when the KEY is on and STAY ON as long as the KEY is on...

    thanks
    Mark
    I may remember why I went to the other end of the shop, I'm just afraid once I get there I'll forget how to get back!

Page 2 of 4 FirstFirst 1234 LastLast

Similar Threads

  1. Parting 95 f150
    By mark in boonville ny in forum Private Party Ads
    Replies: 0
    Last Post: 01-14-2012, 03:17 PM
  2. 6.4 Powerstroke in F150?
    By dgl24087 in forum Trailers & Transportation
    Replies: 27
    Last Post: 11-26-2007, 07:21 PM
  3. The New F150
    By Bob_In_MN in forum Related Topics
    Replies: 174
    Last Post: 10-25-2003, 08:46 PM
  4. F150 Commercials Got Me
    By thcri in forum Photos
    Replies: 7
    Last Post: 10-09-2003, 05:22 PM
  5. F-650 Custom Pickup Conversion(now heres a pickup)
    By Scott_in_WVA in forum Related Topics
    Replies: 42
    Last Post: 09-05-2002, 08:08 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
© 2014 TractorByNet.com. TractorByNet is a registered trademark of IMC Digital Universe, Inc. Other trademarks on this page are the property of their respective owners.