How to check MAF

JimmyAky · Jun 26th, 2011, 17:02

Hi got a 53 T5 V70 thing is im not at all impressed with the performance seems to have bad turbo lag and when boost does come on its not that noticable. Had it on a rolling road and it produced 273BHP 380NM torque but iam doubting this as surley ths should give good performance?
Thinking MAF is goosed but dont wanna shell out a lot of money if it is not.
The car has had a brand new turbo 700 miles ago so that cant be a problem.
im comparing it to my 1998 V70 T5 which had 269BHP and had miles more performance. This car had a 3 inch exaust would that make a difference?
What can i check for on my present car? My car does seem to go better with the traction off
Thanks in advance Jimmy

The Hooded Claw · Jun 26th, 2011, 17:24

Dead Simple to check ..

1. Run car "normal" (with MAF connected)

2. Unplug MAF & run again

if the car runs exactly the same with the MAF unplugged then the MAF is Goosed!!!

Keith

JimmyAky · Jun 26th, 2011, 22:07

disconnected maf and car still ran the same as when it wa connected. So does that def say i need a new one?

The Hooded Claw · Jun 26th, 2011, 23:03

Sure Does .... No difference = the one thats connected is a duffer !!

v_matt_v · Jun 26th, 2011, 23:13

Before you buy MAF check the connectors if they're not corroded or loose.

aslan · Jun 27th, 2011, 04:58

Could it be the boost control solenoid?

Had that happened with my V40, very late and poor boost. Getting < 3 psi of boost.

A new boost control solenoid solved it and the new one from Volvo surprisingly is the same as that used for S80 and S60s.

october37 · Jun 27th, 2011, 10:32

Once changed the sensor element only on a previous 99 S80T6 I had several years ago and it worked ok. I was informed at that time that the sensor was the same on all Volvo maf units, its only the sensor housing that could be different. I used the one from a s70 2.4, but I dont know if that still applies. Anyway, the Volvo D5s are a far different car now to what the old S80 T6 was then.

Keith 55reg V70SE D5 AWD Geartronic

JimmyAky · Jun 27th, 2011, 22:38

taking my car to a volvo dealer on friday gonna get the codes read and a once over.
Would a T5 running right put a smile on your face cause all im getting is a frown.
When car is ideling it seems to drop revs then they go back on?
also does this if u blip the throttle then when let go it does it?

pictureimage · Jun 28th, 2011, 13:37

Hi,

My 52 plate T5 is kinda similar, at low down speeds ie pulling away it seems quite energetic, however once it speeds up it doesn't seem to go quite as I think it should.

I've looked into the Boost solenoid and they're not too bad to buy so maybe that first as I'm told it can make quite a difference. Out of interest do you hear the turbo spin up on these things. I'm using to driving VW diesels where you can always here the turbo whining.

C

JimmyAky · Jun 28th, 2011, 16:37

i dont hear mine spin up

Jun 26th, 2011, 17:02	#1
JimmyAky Junior Member Last Online: Aug 12th, 2011 18:03 Join Date: Oct 2008 Location: Barrow-in-Furness	How to check MAF Hi got a 53 T5 V70 thing is im not at all impressed with the performance seems to have bad turbo lag and when boost does come on its not that noticable. Had it on a rolling road and it produced 273BHP 380NM torque but iam doubting this as surley ths should give good performance? Thinking MAF is goosed but dont wanna shell out a lot of money if it is not. The car has had a brand new turbo 700 miles ago so that cant be a problem. im comparing it to my 1998 V70 T5 which had 269BHP and had miles more performance. This car had a 3 inch exaust would that make a difference? What can i check for on my present car? My car does seem to go better with the traction off Thanks in advance Jimmy

Jun 26th, 2011, 17:24	#2
The Hooded Claw Owner Volvovehiclesclub Last Online: Apr 4th, 2014 12:18 Join Date: Dec 2008 Location: Choosing which Volvo to go out in Today !!! lex parsimoniae View Photos By: The Hooded Claw	Dead Simple to check .. 1. Run car "normal" (with MAF connected) 2. Unplug MAF & run again if the car runs exactly the same with the MAF unplugged then the MAF is Goosed!!! Keith __________________ 2000 C70 T5 Phase 1 240 Bhp in Saffron Orange ("SAPPHIRE") 2001 S80 2435cc Now with Andy Northface () 1994 960 CD 3.0 Estate ("The Purple Monster") VOC 25900 lex parsimoniae

Jun 26th, 2011, 23:03	#4
The Hooded Claw Owner Volvovehiclesclub Last Online: Apr 4th, 2014 12:18 Join Date: Dec 2008 Location: Choosing which Volvo to go out in Today !!! lex parsimoniae View Photos By: The Hooded Claw	Sure Does .... No difference = the one thats connected is a duffer !! __________________ 2000 C70 T5 Phase 1 240 Bhp in Saffron Orange ("SAPPHIRE") 2001 S80 2435cc Now with Andy Northface () 1994 960 CD 3.0 Estate ("The Purple Monster") VOC 25900 lex parsimoniae

Jun 26th, 2011, 22:07	#3
JimmyAky Junior Member Last Online: Aug 12th, 2011 18:03 Join Date: Oct 2008 Location: Barrow-in-Furness	disconnected maf and car still ran the same as when it wa connected. So does that def say i need a new one?

Jun 26th, 2011, 23:13	#5
v_matt_v Volvo Fan Last Online: Jul 27th, 2023 23:35 Join Date: Mar 2009 Location: Edinburgh View Photos By: v_matt_v	Before you buy MAF check the connectors if they're not corroded or loose.

Jun 27th, 2011, 04:58	#6
aslan From far away Last Online: May 9th, 2023 05:21 Join Date: Dec 2006 Location: Selangor	Could it be the boost control solenoid? Had that happened with my V40, very late and poor boost. Getting < 3 psi of boost. A new boost control solenoid solved it and the new one from Volvo surprisingly is the same as that used for S80 and S60s.

Jun 27th, 2011, 10:32	#7
october37 Senior Member Last Online: Mar 17th, 2023 13:24 Join Date: Nov 2001 Location: Whitehaven	Once changed the sensor element only on a previous 99 S80T6 I had several years ago and it worked ok. I was informed at that time that the sensor was the same on all Volvo maf units, its only the sensor housing that could be different. I used the one from a s70 2.4, but I dont know if that still applies. Anyway, the Volvo D5s are a far different car now to what the old S80 T6 was then. Keith 55reg V70SE D5 AWD Geartronic

Jun 27th, 2011, 22:38	#8
JimmyAky Junior Member Last Online: Aug 12th, 2011 18:03 Join Date: Oct 2008 Location: Barrow-in-Furness	taking my car to a volvo dealer on friday gonna get the codes read and a once over. Would a T5 running right put a smile on your face cause all im getting is a frown. When car is ideling it seems to drop revs then they go back on? also does this if u blip the throttle then when let go it does it?

Jun 28th, 2011, 13:37	#9
pictureimage New Member Last Online: Aug 27th, 2011 22:31 Join Date: Dec 2010 Location: Bromley	Hi, My 52 plate T5 is kinda similar, at low down speeds ie pulling away it seems quite energetic, however once it speeds up it doesn't seem to go quite as I think it should. I've looked into the Boost solenoid and they're not too bad to buy so maybe that first as I'm told it can make quite a difference. Out of interest do you hear the turbo spin up on these things. I'm using to driving VW diesels where you can always here the turbo whining. C

Jun 28th, 2011, 16:37	#10
JimmyAky Junior Member Last Online: Aug 12th, 2011 18:03 Join Date: Oct 2008 Location: Barrow-in-Furness	i dont hear mine spin up

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