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!

2004 V70 2.4L NA, 5sp low idle, stalling

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive "P2" platform cars.

2001 - 2007 V70
2004 - 2007 V70 R
2001 - 2007 XC-70
2001 - 2009 S60
2003 - 2007 S60 R

ibs740
Posts: 6
Joined: Sat Oct 11, 2014 12:08 pm
Year and Model: V70 2004
Location: Canada
Has thanked: 0
Been thanked: 0
ibs740

2004 V70 2.4L NA, 5sp low idle, stalling

Post by ibs740 » Mon May 11, 2020 4:46 pm

Hi All,

Yesterday my 2004 V70, 2.4 NA, 5sp stalled in traffic. It would start then die, 10X starts and died each time so it came home on a hook.
I found a problem in the cable connecting the MAF. Voltage was as speced but the resistance between pins 4-5 was 1.8 M ohm. I found the ECU locking bars were not fully engaged. I tightened them and the car fired right up and drove normally except the idle was low 600 vs 750.

Starting cold the engine has the normal high idle then it drops.

Today I started the car backed out of the driveway and it stalled. When the throttle was let off the engine revs drop and the car stalls.

No codes so I'm guessing it's the ECU.

Thoughts?

User avatar
oragex
Posts: 4808
Joined: Fri May 24, 2013 6:20 am
Year and Model: S60 2003
Location: Canada
Has thanked: 95 times
Been thanked: 265 times
Contact:
Canada
oragex

Re: 2004 V70 2.4L NA, 5sp low idle, stalling

Post by oragex » Mon May 11, 2020 6:02 pm

Google up about FPS and PEM. PEM used off Ebay, FPS from Fcpeuro.com
Do not replace the fuel pump (cheap garages want to replace it)

cn90
Posts: 6688
Joined: Wed Mar 31, 2010 9:54 am
Year and Model: 2004 V70 2.5T
Location: Omaha NE
Has thanked: 0
Been thanked: 131 times
United States of America
cn90

Re: 2004 V70 2.4L NA, 5sp low idle, stalling

Post by cn90 » Tue May 12, 2020 7:21 am

Or clean Throttle Body.

I wrote the DIY throttle body for my 2005 XC90 2.5T in this forum. Please search for it...
2004 V70 2.5T 100K+
2005 XC90 2.5T 110K+

ibs740
Posts: 6
Joined: Sat Oct 11, 2014 12:08 pm
Year and Model: V70 2004
Location: Canada
Has thanked: 0
Been thanked: 0
ibs740

Re: 2004 V70 2.4L NA, 5sp low idle, stalling

Post by ibs740 » Tue May 12, 2020 2:23 pm

Hi, The PEM was replaced in 2016. Used VOLVO OEM

It has 50ish psi at the fuel rail. Not sure if there is a feedback loop including the ECU or just inside the FPS (self measuring)
Throttle body was cleaned a year ago and is usually a gradual symptom. This was OK 1 day NFG the next.
Have a spare FPS so it's fast to change.
Will get back to all.
Thanks

User avatar
oragex
Posts: 4808
Joined: Fri May 24, 2013 6:20 am
Year and Model: S60 2003
Location: Canada
Has thanked: 95 times
Been thanked: 265 times
Contact:
Canada
oragex

Re: 2004 V70 2.4L NA, 5sp low idle, stalling

Post by oragex » Tue May 12, 2020 2:53 pm

When it stalls, push the valve at the rail with a piece of paper towel on top of it, see if it got some pressure. There's either no power at the coils or no gas pressure. Was the pump replaced with aftermarket ? Any lights/messages ?

ibs740
Posts: 6
Joined: Sat Oct 11, 2014 12:08 pm
Year and Model: V70 2004
Location: Canada
Has thanked: 0
Been thanked: 0
ibs740

Re: 2004 V70 2.4L NA, 5sp low idle, stalling

Post by ibs740 » Sat May 16, 2020 9:46 pm

ibs740 wrote:
Tue May 12, 2020 2:23 pm
Hi, The PEM was replaced in 2016. Used VOLVO OEM

It has 50ish psi at the fuel rail. Not sure if there is a feedback loop including the ECU or just inside the FPS (self measuring)
Throttle body was cleaned a year ago and is usually a gradual symptom. This was OK 1 day NFG the next.
Have a spare FPS so it's fast to change.
Will get back to all.
Thanks
I started the car and let it idle until it reached operating temp and the idle changed from 550-600 to the normal 750 ish and smooth.
Let it cool off and popped the throttle body inlet hose and wiped down the TB bore and butterfly with MAF sensor cleaner (used to have a pair of 91-B230FTs, 740/940 with the hot wire MAFs). Sprayed the MAF also. The TB had a black greasy film in it. Fired it up the next day. It idled nicely, drove as before.
Thanks for the input.

User avatar
abscate
MVS Moderator
Posts: 21020
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99T5 ,99S70,2005V70
Location: NYC, ALBANY NY
Has thanked: 315 times
Been thanked: 969 times
Trinidad & Tobago
abscate

Re: 2004 V70 2.4L NA, 5sp low idle, stalling

Post by abscate » Sun May 17, 2020 4:07 am

Continue to monitor.

PEMs fail intermittently, and your used 2016 one is near end of life

Mine failed over about 4 months ,occasional miss under load, very subtle, then one day Nostart
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

Post Reply
  • Similar Topics
    Replies
    Views
    Last post