Volvo 850 Made from 1993 to 1997, this Volvo line was available in both a wagon and a sedan, both with were graced with several trim levels.

Car died

Old Dec 24, 2012 | 03:04 PM
  #21  
gdog's Avatar
Senior Member
Joined: Jul 2008
Posts: 2,052
Likes: 4
From: Pac NW
Default

Originally Posted by Phil 850
New update. The fuel pump is not running and of course no fuel pressure. I had a friend turn on the ignition while I had my ear to the pump and no sound at all.
And you're sure you had 12v across the pump red and black wires at the time?

Assuming so, I would pull the pump out and ck the two wire continuities down from the connector to the pump itself using a VOM. Suspect maybe one, or both, of the connections/connectors might be faulty. You had to splice in connectors when you installed, yes?

DO NOT ATTEMPT TO RUN THE PUMP WHILE IT'S OUT OF THE TANK!!

Why? Two reasons:
  1. It's a fire hazard! These pumps are designed to be operated when submerged in fuel; i.e. sans any oxygen. When out of the tank it will have residual fuel in the pump and plenty of air around it. These are DC motors so the commutator can and will spark.
  2. Bad for the pump; the fuel going through it actually lubricates it and keeps it from over-heating.
If the wire connections are good, did the screen fall off of the fuel pickup? Operating the pump w/o the screen could cause the pump to fail prematurely...
 

Last edited by gdog; Dec 24, 2012 at 03:12 PM.
Reply
Old Dec 24, 2012 | 03:20 PM
  #22  
Kiss4aFrog's Avatar
Administrator
Joined: Mar 2010
Posts: 4,517
Likes: 12
From: Cape Coral, FL
Default

You might want to try a new fuel pump relay. There is a way to jump the relay in the box but I don't the the terminal numbers off the top of my head. If you jump the relay and you hear the pump then you know it's the relay that's faulty.
 

Last edited by Kiss4aFrog; Dec 24, 2012 at 04:34 PM.
Reply
Old Dec 24, 2012 | 04:02 PM
  #23  
Phil 850's Avatar
Thread Starter
|
Senior Member
Joined: Jun 2012
Posts: 472
Likes: 1
From: Sonoma County, California
Default

I checked the voltage using my VOM across the two leads at the connector at the pump and had 12 volts.
 
Reply
Old Dec 24, 2012 | 04:35 PM
  #24  
Kiss4aFrog's Avatar
Administrator
Joined: Mar 2010
Posts: 4,517
Likes: 12
From: Cape Coral, FL
Default

Re: fuel pump relay

by Ozark Lee » 27 Nov 2009, 10:35
Using a paper clip to jump between the socket positions associated with pins 15 and 87 on the relay is the procedure to by pass the relay itself. If the car runs OK the relay was bad, if you still have no fuel pressure then the fuel pump itself is likely bad.

...Lee
 
Reply
Old Dec 29, 2012 | 09:44 PM
  #25  
Phil 850's Avatar
Thread Starter
|
Senior Member
Joined: Jun 2012
Posts: 472
Likes: 1
From: Sonoma County, California
Default

Newest update
I pulled the fuel pump to change it out and when I was removing it from the upper housing the red wire dropped off the solder connection where it joins to the external wires. This was on the inside connection so it was not visible until the pump was out and then it looked connected until I moved the wire and found it not connected.
I resoldered the connections and put it all back together and the car started right up.
 
Reply
Old Dec 30, 2012 | 12:44 PM
  #26  
Kiss4aFrog's Avatar
Administrator
Joined: Mar 2010
Posts: 4,517
Likes: 12
From: Cape Coral, FL
Default

Another happy 850 back on the road
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
gumslinger
Volvo 240, 740 & 940
9
May 8, 2008 11:11 AM
ludeless
Volvo 850
6
Mar 1, 2008 04:41 PM
bowhunterick
Volvo 240, 740 & 940
3
Jan 21, 2008 11:38 PM
Squiggy
Volvo 850
3
Jan 12, 2008 10:55 AM
Spazum888
Volvo S70
6
May 14, 2007 12:48 PM


Thread Tools
Search this Thread

All times are GMT -5. The time now is 06:39 PM.