XC70 running issue

Inver · Jul 17th, 2014, 21:19

Hello to all.

I have recently bought a 51 plate XC70 2.4 petrol. Its got a slight issue we knew about when buying but has inevitably got worse.

If its cold it will occasionally struggle to start. When its running its generally under power till the turbo hits. It will have spells of "normal power" when accelerating but is normally struggling. When accelerating it'll accelerate smoothly then (no matter the speed / gear / revs) will "hesitate" and feel under power, but not loose speed, then pick up again its self.

It has had the vacuum system looked for leaks by a garage. I have looked my self and replaced the MAF sensor. There is a ODB message for the maf occasionally P0103. I have read it should read approx 16Kg/h at idle but currently reads about 22Kg/h.

Help please, as I am now out of ideas!!!!

Thank you!

Chris_Rogers · Jul 17th, 2014, 21:24

"I have looked myself and replaced the MAF sensor"

Was it a genuine Bosch unit?

Idle should be around 12kg/hr.

Inver · Jul 17th, 2014, 21:33

As I wasn't sure it would fix it I put an after market unit in. Was that wise!?

Chris_Rogers · Jul 17th, 2014, 21:51

These cars don't run properly with non genuine sensors.

You don't need to buy one in a Volvo box but a genuine OEM (Bosch) for the turbo cars will do, these usually around 1/2 the price of the Volvo branded unit.

Use the 10 digit Bosch part No. on the original sensor to find a replacement.

Inver · Jul 17th, 2014, 22:03

Ok thank you, I will give that a try and get back!!

cheshired5 · Jul 17th, 2014, 23:36

Speaking from experience, go genuine on MAF every time.
I also echo what Chris says about using the Bosch part number. It'll widen your search options as the same unit will be used on multiple manufacturers.
If I remember right, my MAF is also on Alfa's. Not sure if that's good or bad.

I got a recon genuine Bosch from eBay for £30 delivered, which I bet is about what you paid for your generic.
If you have no joy sourcing one and you still have your original Bosch knocking about, you could always try CRC MAF cleaner for £9.99 from eBay.

Inver · Jul 18th, 2014, 16:16

Thank you for your input. Does 8670623 sound like the Bosch number?

Jul 17th, 2014, 21:19	#1
Inver New Member Last Online: Feb 15th, 2016 21:52 Join Date: Jun 2012 Location: Kirkwall	XC70 running issue Hello to all. I have recently bought a 51 plate XC70 2.4 petrol. Its got a slight issue we knew about when buying but has inevitably got worse. If its cold it will occasionally struggle to start. When its running its generally under power till the turbo hits. It will have spells of "normal power" when accelerating but is normally struggling. When accelerating it'll accelerate smoothly then (no matter the speed / gear / revs) will "hesitate" and feel under power, but not loose speed, then pick up again its self. It has had the vacuum system looked for leaks by a garage. I have looked my self and replaced the MAF sensor. There is a ODB message for the maf occasionally P0103. I have read it should read approx 16Kg/h at idle but currently reads about 22Kg/h. Help please, as I am now out of ideas!!!! Thank you!

Jul 17th, 2014, 23:36	#6
cheshired5 Premier Member Last Online: Dec 26th, 2021 13:42 Join Date: Dec 2013 Location: Crewe	Speaking from experience, go genuine on MAF every time. I also echo what Chris says about using the Bosch part number. It'll widen your search options as the same unit will be used on multiple manufacturers. If I remember right, my MAF is also on Alfa's. Not sure if that's good or bad. I got a recon genuine Bosch from eBay for £30 delivered, which I bet is about what you paid for your generic. If you have no joy sourcing one and you still have your original Bosch knocking about, you could always try CRC MAF cleaner for £9.99 from eBay. __________________ 2002 S60 SE D5 Manual 209000 miles

Jul 17th, 2014, 21:24	#2
Chris_Rogers VOC Member Last Online: Apr 10th, 2017 16:55 Join Date: Jan 1970 Location: South Kent Coast	"I have looked myself and replaced the MAF sensor" Was it a genuine Bosch unit? Idle should be around 12kg/hr.

Jul 17th, 2014, 21:33	#3
Inver New Member Last Online: Feb 15th, 2016 21:52 Join Date: Jun 2012 Location: Kirkwall	As I wasn't sure it would fix it I put an after market unit in. Was that wise!?

Jul 17th, 2014, 21:51	#4
Chris_Rogers VOC Member Last Online: Apr 10th, 2017 16:55 Join Date: Jan 1970 Location: South Kent Coast	These cars don't run properly with non genuine sensors. You don't need to buy one in a Volvo box but a genuine OEM (Bosch) for the turbo cars will do, these usually around 1/2 the price of the Volvo branded unit. Use the 10 digit Bosch part No. on the original sensor to find a replacement.

Jul 17th, 2014, 22:03	#5
Inver New Member Last Online: Feb 15th, 2016 21:52 Join Date: Jun 2012 Location: Kirkwall	Ok thank you, I will give that a try and get back!!

Jul 18th, 2014, 16:16	#7
Inver New Member Last Online: Feb 15th, 2016 21:52 Join Date: Jun 2012 Location: Kirkwall	Thank you for your input. Does 8670623 sound like the Bosch number?

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