Volvo AWD 850 Forum

INDEX FOR 10/2025(CURRENT) INDEX FOR 1/2004 850 INDEX

[<<]  [>>]


THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD




  REPLY TO THIS MESSAGE    PRINT   SAVE 

855 GLT fuel pump without electric feed-relay or mystery? 850 1997

posted by  chuck from fresno on  Sat Sep 3 09:32 CST 2005
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS] [RELATED]

I need direction to the next troubleshooting test.
Friday my wife phoned,"Help, I need tow, "Precious" suddenly won't start-no warnings leading up to this". 1997 855GLT Turbo then got towed home.
My Saturday analysis of car in garage is as follows-what next?
Only Codes showing: PO300,PO301,PO302,PO303,PO304,PO305 (all cylinders interpreted as "general misfire"). No sensor codes or ignition issues. must be a fuel problem.
No initial fuel pump start up sound when ignition key rotated from "On" & "Start positions. Engine turns over continueously and NO fuel pressure registering from schrader valve on fuel rail. No voltage at pump. Ground is good.
No pump start when "jumpwired" direct from battery (with a 15 amp fuse inline with "positive jump wire". No buzz sound or anything during this.
Not sure though about testing procedure of the pump relay. With relay cover removed and replugged into the fuse block the contacts click when going from "Off" to "On"/"Start" ignition positions. No pump start when relay contacts are cleaned and massaged together.
I then removed the relay from the fuse block and came up with the following results from the fuse block contacts: Volt meter shows 12 volts across both #15 to #31 & #15 and #87. when in "on" position. #15 to #31b shows no voltage.
Are these normal readings? I dread putting a $350.00 pump into "Precious" to later find the relay was the initial cause.
Is there another item to explore?
chuck from fresno








  •   REPLY TO THIS MESSAGE    PRINT   SAVE 

    855 GLT fuel pump without electric feed-relay or mystery? 850 1997

    posted by  someone claiming to be bob on  Sat Sep 3 19:21 CST 2005 [RELATED]

    Jump terminal 15 and 87. If the pump runs, you have a relay, wiring or ecu problem. If not, pump or wiring after relay problem.








    •   REPLY TO THIS MESSAGE    PRINT   SAVE 

      855 GLT fuel pump without electric feed-relay or mystery? 850 1997

      posted by  someone claiming to be chuck from fresno on  Sun Sep 4 01:16 CST 2005 [RELATED]

      Bob,

      You gave me the sort of straight response I was looking for. Stay tuned, I will try it at sun up.
      It is 4:57PST here in california. What are you doing up so early. I can't sleep cause I feel sorry for myself. Teenage daughters and terrific cranky wife. You know how it goes. I'll fix the Volvos and keep my space.
      Secondary question:
      Why would the following happen?
      Key in "ON" position, the pump relay removed, volt meter grounded to frame, volt meter positive on terminal 31b on the fuse block.
      Why do I get 2 volts + out of term. 31b ? Is that coming from the ECU to signal something or what?
      Thank you Bob,

      chuck








      •   REPLY TO THIS MESSAGE    PRINT   SAVE 

        855 GLT fuel pump without electric feed-relay or mystery? 850 1997

        posted by  someone claiming to be chuck from fresno on  Sun Sep 4 04:48 CST 2005 [RELATED]

        I jumped the wires as suggested. No gas out of schrader test port and my wires to the pump are 12 volt. No pump sounds.
        Tommorow I'll order pump..., regulator and relay for good measure. This is going to be spendy.

        Thanks,
        Chuck








  •   REPLY TO THIS MESSAGE Replies to this message will be emailed.    PRINT   SAVE 

    855 GLT fuel pump without electric feed-relay or mystery? 850 1997

    posted by  MadeInJapan on  Sat Sep 3 10:15 CST 2005
    Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
    last visit: Sat Oct 2 06:34 CST 2010
    [RELATED]

    Try them: Cheaper and less hassle than replacing the feul pump just to find out it was the relay:
    http://www.carpartsemergency.com/volvo-850-fuel-pump-relay.html
    --
    1998 S70 T5 Emarald Green Metallic, 2004 V70 2.5T Ruby Red, Previous Owner of Black '94 850 Turbo Wagon







<< < > >>



©Jarrod Stenberg 1997-2022. All material except where indicated.


All participants agree to these terms.

Brickboard.com is not affiliated with nor sponsored by AB Volvo, Volvo Car Corporation, Volvo Cars of North America, Inc. or Ford Motor Company. Brickboard.com is a Volvo owner/enthusiast site, similar to a club, and does not intend to pose as an official Volvo site. The official Volvo site can be found here.