Maf Question

wicksy_64 · 16th May 2009, 20:32

Just bought various bits to carry out a service, and due to poor fuel economy I am looking to replace PCV filter as well as the MAF as I believe this can cause low MPG. The current maf is a pierburg and has been in service for about 25000 miles it is also connected to a ron box. Do these have a use by date? thanks.

JohnDotCom · 16th May 2009, 21:36

No use by date as such.
I take it the Ron box is one with a Mafam section in it?

Easiest check is to disconnect MAF and see any difference in Performance and economy.
If a MAF gets wet at all through water being drawn through front then it can fail.
Pierburg MAFs normally last a lot longer than Bosch ones but no set mileage for them.
Bosch 22K upward
Pierburg 40K upward normally.
But time frame can also alter this somewhat.

wicksy_64 · 18th May 2009, 13:08

thanks John. No sign of deteriation, but still get poor fuel economy. Hopefully service should help.

baggie9 · 20th May 2009, 14:48

Hi Whicksy,I got my new pcv of ebay its a freelander one and cost around £20.Have you change the fuel filter?

16th May 2009, 20:32	#1
wicksy_64 Avid contributor Rover 75 connie se Join Date: Sep 2007 Location: Nottingham Posts: 184 Thanks: 0 Thanked 0 Times in 0 Posts	Maf Question Just bought various bits to carry out a service, and due to poor fuel economy I am looking to replace PCV filter as well as the MAF as I believe this can cause low MPG. The current maf is a pierburg and has been in service for about 25000 miles it is also connected to a ron box. Do these have a use by date? thanks.

16th May 2009, 21:36	#2
JohnDotCom * Rover 75 FaceLift Tourer CDTi 170BHP Auto ConnSE 2005 Model Starlight Silver Join Date: Nov 2006 Location: Abergele Posts: 28,735 Thanks: 0 Thanked 6 Times in 5 Posts	No use by date as such. I take it the Ron box is one with a Mafam section in it? Easiest check is to disconnect MAF and see any difference in Performance and economy. If a MAF gets wet at all through water being drawn through front then it can fail. Pierburg MAFs normally last a lot longer than Bosch ones but no set mileage for them. Bosch 22K upward Pierburg 40K upward normally. But time frame can also alter this somewhat.

18th May 2009, 13:08	#3
wicksy_64 Avid contributor Rover 75 connie se Join Date: Sep 2007 Location: Nottingham Posts: 184 Thanks: 0 Thanked 0 Times in 0 Posts	thanks John. No sign of deteriation, but still get poor fuel economy. Hopefully service should help.

20th May 2009, 14:48	#4
baggie9 Posted a thing or two Jaguar s Type Join Date: Feb 2009 Location: tipton Posts: 1,369 Thanks: 3 Thanked 1 Time in 1 Post	Hi Whicksy,I got my new pcv of ebay its a freelander one and cost around £20.Have you change the fuel filter?