850 1995 turns over doesn't start

Post by **HML** » 13 Feb 2009, 10:57

was running fine engine turns won't start
1st time waited and then it started
2nd time started made it out of drive and died
checking for relay problem
looking for advice in case it is fuel pump

Post by **Ozark Lee** » 13 Feb 2009, 12:19

Welcome to MVS HML,

You need to start by checking the fuel pressure at the fuel rail. A quick and dirty way to do it is to use a tire gauge if you don't have a fuel pressure gauge. The test is made at the schrader valve on the end of the fuel rail. It should be around 44 PSI.

Fuel pumps normally fail in an all or nothing manner. The fuel pump relay does tend to fail in an intermittent fashion like you describe though.

If you don't have fuel pressure you can try to jumper the fuel pump relay. It is relay 103 and it is located under the cover of the fuse box. The relay has 4 pins and the pin numbers are molded into the base next to each pin. The numbers are 31, 31b, 15 and 87. Jumper the socket positions associated with pins 15 and 87. If the car starts and runs with the relay jumpered the the relay either needs to be replaced or repaired.

If you have no fuel pressure with the relay jumpered then the pump itself is likely bad.

...Lee

Post by **HML** » 16 Mar 2009, 10:36

Thanks, for the quick reply and my apologies with my slow follow up. I did the test at the Schrader valve, no pressure. I changed out the relay for a working one, no pressure. I listened for the prime noise, nothing. So, the fuel pump seems to be the culprit?

Post by **Ozark Lee** » 16 Mar 2009, 11:44

I listened for the prime noise, nothing. So, the fuel pump seems to be the culprit?

The fuel pump indeed. Most people just change the guts out with a Walbro kit. JHEIII874T5M over on Volvospeed sells the replacement kits.

...Lee

Post by **HML** » 16 Mar 2009, 17:06

Many thanks!

pagarb · Post by **pagarb** » 20 Mar 2009, 22:31

Hi, I'm new to the forum but found this thread matches a situation I have with a '94 850 Turbo.

Wanted to share some information on a source for a fuel pump..

http://sfbay.craigslist.org/eby/pts/1080305488.html

He's a real nice guy named Rusty Cohn, his website is http://www.rprusa.com and he'll take calls and his prices are very reasonable.

regards,

pagarb

John Cherubini Dublin · Post by **John Cherubini Dublin** » 21 Mar 2009, 06:53

Hi. I recently changed a fuel pump on an 850 and found a thread by luketrash called 'fuel pump removal made easy' very helpfull,it includes step by step instructions inc photos,
best of luck
John.

96 volvo 850 2.0GLT 211k miles
00 volvo S80 2.0T 82k miles

Post by **HML** » 01 Apr 2009, 13:29

Ozark Lee wrote:
I listened for the prime noise, nothing. So, the fuel pump seems to be the culprit?
The fuel pump indeed. Most people just change the guts out with a Walbro kit. JHEIII874T5M over on Volvospeed sells the replacement kits.

...Lee

That guy took two weeks to get me the pump his pay pal/bank connection wasn't working. He sent just the pump alone for $90, he told me there were no such things as kits I need a Walbro pick up filter. I can' find one locally.

Post by **confused_al** » 01 Apr 2009, 14:10

Craigd2599 wrote:I bought the Volvo pump from Darrell Waltrip and changed it in less than 30 minutes. Very easy to do. Cost me under $90

Post by **Ozark Lee** » 01 Apr 2009, 14:44

That guy took two weeks to get me the pump his pay pal/bank connection wasn't working. He sent just the pump alone for $90, he told me there were no such things as kits I need a Walbro pick up filter. I can' find one locally.

Wow, I'm sorry to hear that. I've never used him as I've not yet had a pump fail. The guys over on VS always raved about him and that is why I made the recommendation. Thanks for letting me know so that I don't make that recommendation any more.

...Lee