IPD sale XeMODeX - Experts in Volvo Electronics
Did you know? 🤔
Logged in users can get email notification of topic replies Log in or register (free).
Amazon Link Buy anything with this and it helps MVS!

00 S70 5-spd non-turbo lags/surges while cruising ( Bad fuel pump relay 103) Topic is solved

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

Brucebo
Posts: 237
Joined: Wed May 14, 2008 10:06 pm
Year and Model: 850 '96, S70 '99
Location: SF Bay Area
Has thanked: 0
Been thanked: 1 time
United States of America
Brucebo

00 S70 5-spd non-turbo lags/surges while cruising ( Bad fuel pump relay 103)  Topic is solved

Post by Brucebo » Wed Mar 15, 2017 10:01 pm

I have a 2000 S70 non-turbo that started acting up today. No codes or CEL. While driving along ~40 mph I started noticing an intermittent lack of throttle response, and then a surge. This happened a few times. I pulled over, put the car in neutral, idled for a second, rev'ed the engine a few times (without issue), put the car back in drive and drove the rest of the way home without issue. I've experienced ETM issues on my other S70 but I've never experienced this problem before. Does anybody know what is going on? This is my daughter's car. I'll be driving it the rest of the week in order to collect more data/symptoms.

User avatar
abscate
MVS Moderator
Posts: 21086
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99T5 ,99S70,2005V70
Location: NYC, ALBANY NY
Has thanked: 318 times
Been thanked: 982 times
Trinidad & Tobago
abscate

Re: 00 S70 5-spd non-turbo lags/surges while cruising

Post by abscate » Thu Mar 16, 2017 2:06 am

The nice part of ME7 engine management is it's pretty simple.

How many miles on car and spark plugs? Ignition coils?

Classic cause of running issues is Vacuum leaks..you have to remove and inspect to eliminate these.

Once the ETB starts getting worn, it typicall runs 10000 miles before the ETS light shows up, and limp mode follows that shortly thereafter
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
Link to Maintenance record thread
Link To Volvo Glossary

Brucebo
Posts: 237
Joined: Wed May 14, 2008 10:06 pm
Year and Model: 850 '96, S70 '99
Location: SF Bay Area
Has thanked: 0
Been thanked: 1 time
United States of America
Brucebo

Re: 00 S70 5-spd non-turbo lags/surges while cruising

Post by Brucebo » Thu Mar 16, 2017 4:36 pm

Drove it to work today. 30 miles on the freeway plus city driving. No issue. So it looks like I'm dealing with an intermittent ghost.

deardeergod
Posts: 16
Joined: Tue Jan 05, 2016 1:06 pm
Year and Model: 1999 V70 AWD
Location: Cincinnati, OH
Has thanked: 1 time
Been thanked: 0
United States of America
deardeergod

Re: 00 S70 5-spd non-turbo lags/surges while cruising

Post by deardeergod » Fri Mar 17, 2017 7:04 am

Is this while you are coasting? Or going down an incline?

User avatar
sleddriver
Posts: 975
Joined: Thu Apr 08, 2010 6:06 pm
Year and Model: 1998 V70 T5
Location: Tx
Has thanked: 11 times
Been thanked: 11 times
United States of America
sleddriver

Re: 00 S70 5-spd non-turbo lags/surges while cruising

Post by sleddriver » Fri Mar 17, 2017 6:39 pm

abscate wrote:Classic cause of running issues is Vacuum leaks..you have to remove and inspect to eliminate these.
+1
Beat me to it.
Easiest way to track these down is to build a DIY smoker.
1998 V70 T5 226,808 miles. Original Owner.
M1 10W-30 HM

Brucebo
Posts: 237
Joined: Wed May 14, 2008 10:06 pm
Year and Model: 850 '96, S70 '99
Location: SF Bay Area
Has thanked: 0
Been thanked: 1 time
United States of America
Brucebo

Re: 00 S70 5-spd non-turbo lags/surges while cruising

Post by Brucebo » Sun Mar 19, 2017 8:10 pm

I've had vacuum leaks before. They just cause overall constant degradation, not sudden intermittent stalls out of nowhere. It happened again today after 200 miles of driving. I pulled over, turned off the car. Started it again and it ran fine for the rest of the way home. I'm tending to think it may be an intermittent fuel pump issue.

JRL
Posts: 9351
Joined: Tue Nov 22, 2005 2:07 pm
Year and Model: Several
Location: 19333
Has thanked: 0
Been thanked: 12 times
United States of America
JRL

Re: 00 S70 5-spd non-turbo lags/surges while cruising

Post by JRL » Mon Mar 20, 2017 10:41 am

ETM
2000 V70R Black, 144,000 miles Wife's R.
2007 V70 2.5T White/Oak 111,000 MILES. Polestar tune, IPD bars, rear spoiler, dark grey Thors, DWS 06, HU850, sub.

Contact info for purchases: [email protected]

Brucebo
Posts: 237
Joined: Wed May 14, 2008 10:06 pm
Year and Model: 850 '96, S70 '99
Location: SF Bay Area
Has thanked: 0
Been thanked: 1 time
United States of America
Brucebo

Re: 00 S70 5-spd non-turbo lags/surges while cruising

Post by Brucebo » Fri May 12, 2017 9:03 pm

Found the problem. The problem became less intermittent, engine would reliably start then conk after a second, so I was able to track it down. Good fuel pressure before starting but no fuel pressure after starting. Turned out to be the big red "103" fuel pump relay. Swapped it with the one from my other Volvo and the problem tracked with the relay.

http://cdn4.pelicanparts.com/techarticl ... /pic15.jpg

cajunxchange
Posts: 22
Joined: Mon Mar 20, 2017 6:26 am
Year and Model: 1999 S70
Location: Louisiana
Has thanked: 0
Been thanked: 0
United States of America
cajunxchange

Re: 00 S70 5-spd non-turbo lags/surges while cruising

Post by cajunxchange » Fri May 26, 2017 3:12 am

Brucebo wrote:
Fri May 12, 2017 9:03 pm
Found the problem. The problem became less intermittent, engine would reliably start then conk after a second, so I was able to track it down. Good fuel pressure before starting but no fuel pressure after starting. Turned out to be the big red "103" fuel pump relay. Swapped it with the one from my other Volvo and the problem tracked with the relay.

http://cdn4.pelicanparts.com/techarticl ... /pic15.jpg
I think Im having the same issue with a 99s70 na. Intermittent lag and cruise issue...However, more recently Ive noticed it is having problems with warm cranks. I have to give it a lil gas for it to start up. Ive read on here it could be an ect issue. Im glad I came across this post because your problems seem to mirror mine. Should I change relay and ect?

Post Reply
  • Similar Topics
    Replies
    Views
    Last post