Mismatch on MAF plug

Dave shirley · 4th September 2007, 22:00

Hello, new member with first post. ( Puzzle ) On recently purchased 75 tourer diesel found plug not inserted into socket on MAF senser.It could never ever have fitted the senser on the inlet manifold, shape all wrong. on removing plastic insert up inside plug it will fit senser but not lock into place. Suspect senser has been changed at some time for the wrong item say off a petrol engine car but does not look as though it has ever been removed. Any suggestions, I think I should order a new diesel MAF senser against the cars chassis number but where from to save a bit of cash. All help appreciated, Dave.

MGOracle · 5th September 2007, 12:57

Hi Dave, & welcome.

It sounds like you have an odd problem indeed.

If you are a BOSCH fan boy and love having to clean a non serviceable MAF sensor every 2-3k miles then by all means pay £150+ for a new MGR unit.

Alternatively, as all diesels are the same, you can speak to Rover Ron (you might see his advert at the top of this page). He can supply you with a Pierburgh unit for about £58 which will outlast the Bosch one. However, it needs to have its signal amplified and Ron makes and sells these units too. I think the whole thing can be had for about £80 or there abouts.

Drop him an email and he'll gladly sort you out.

Dave shirley · 5th September 2007, 23:31

Thanks for the reply, I have the ECU away at the ECU Doctors at the present time as got very wet with the recent rains we had. ( blocked drain trouble)Will try and match everything up when it returns. Will these engines run without the MAF being connected, I ask because this one as far as I can see never ever was plugged in. Dave.

MGOracle · 6th September 2007, 11:39

Yes they will, but over a long period of time it wont be doing much good.

Keith · 7th September 2007, 12:31

Dave it will run fine, in the winter perhaps better than fine! but in warmer weather the car might smoke a bit due to over fuelling that's all

Dave shirley · 7th September 2007, 22:02

Thanks for the reply Keith, will let you know when I finally get it running, as I said before plug does fit but I have had to take a plastic insert out of the plug to do so, I will try it with and without connecting it. Thanks Dave.

Dave shirley · 28th September 2007, 23:06

As promised update on above topic. Now have the car running with a reconditioned ECU ( expensive or what?) Plugged in MAF and engine will not pick up revs beyond tickover, disconnected engine runs fine. Now having to make decision to replace MAF as it should have one ( more money) or leave as it is. With this is mind as I mentioned before how did the currently fitted MAF get onto the engine in the first place as clearly it has never ever been capable of being connected to the plug which definately is original. Any ideas please.

pondweed · 29th September 2007, 07:58

"well, what were the 'intentions' of the last owner" is the first thing that springs to mind...

4th September 2007, 22:00	#1
Dave shirley Regular poster ROVER 75 TOURER Join Date: Sep 2007 Location: Faringdon. Posts: 62 Thanks: 2 Thanked 5 Times in 4 Posts	Mismatch on MAF plug Hello, new member with first post. ( Puzzle ) On recently purchased 75 tourer diesel found plug not inserted into socket on MAF senser.It could never ever have fitted the senser on the inlet manifold, shape all wrong. on removing plastic insert up inside plug it will fit senser but not lock into place. Suspect senser has been changed at some time for the wrong item say off a petrol engine car but does not look as though it has ever been removed. Any suggestions, I think I should order a new diesel MAF senser against the cars chassis number but where from to save a bit of cash. All help appreciated, Dave.

5th September 2007, 23:31	#3
Dave shirley Regular poster ROVER 75 TOURER Join Date: Sep 2007 Location: Faringdon. Posts: 62 Thanks: 2 Thanked 5 Times in 4 Posts	mismatch on MAF plug Thanks for the reply, I have the ECU away at the ECU Doctors at the present time as got very wet with the recent rains we had. ( blocked drain trouble)Will try and match everything up when it returns. Will these engines run without the MAF being connected, I ask because this one as far as I can see never ever was plugged in. Dave.

7th September 2007, 22:02	#6
Dave shirley Regular poster ROVER 75 TOURER Join Date: Sep 2007 Location: Faringdon. Posts: 62 Thanks: 2 Thanked 5 Times in 4 Posts	mismatch on MAF plug Thanks for the reply Keith, will let you know when I finally get it running, as I said before plug does fit but I have had to take a plastic insert out of the plug to do so, I will try it with and without connecting it. Thanks Dave.

28th September 2007, 23:06	#7
Dave shirley Regular poster ROVER 75 TOURER Join Date: Sep 2007 Location: Faringdon. Posts: 62 Thanks: 2 Thanked 5 Times in 4 Posts	mismatch on MAF plug As promised update on above topic. Now have the car running with a reconditioned ECU ( expensive or what?) Plugged in MAF and engine will not pick up revs beyond tickover, disconnected engine runs fine. Now having to make decision to replace MAF as it should have one ( more money) or leave as it is. With this is mind as I mentioned before how did the currently fitted MAF get onto the engine in the first place as clearly it has never ever been capable of being connected to the plug which definately is original. Any ideas please.

5th September 2007, 12:57	#2
MGOracle Banned MG ZT CDTi 135+ Join Date: Mar 2007 Location: Cardiff Posts: 1 Thanks: 0 Thanked 5 Times in 2 Posts	Hi Dave, & welcome. It sounds like you have an odd problem indeed. If you are a BOSCH fan boy and love having to clean a non serviceable MAF sensor every 2-3k miles then by all means pay £150+ for a new MGR unit. Alternatively, as all diesels are the same, you can speak to Rover Ron (you might see his advert at the top of this page). He can supply you with a Pierburgh unit for about £58 which will outlast the Bosch one. However, it needs to have its signal amplified and Ron makes and sells these units too. I think the whole thing can be had for about £80 or there abouts. Drop him an email and he'll gladly sort you out.

6th September 2007, 11:39	#4
MGOracle Banned MG ZT CDTi 135+ Join Date: Mar 2007 Location: Cardiff Posts: 1 Thanks: 0 Thanked 5 Times in 2 Posts	Yes they will, but over a long period of time it wont be doing much good.

7th September 2007, 12:31	#5
Keith This is my second home ZT400 Join Date: Oct 2006 Location: Ellesmere Posts: 5,948 Thanks: 0 Thanked 43 Times in 29 Posts	Dave it will run fine, in the winter perhaps better than fine! but in warmer weather the car might smoke a bit due to over fuelling that's all

29th September 2007, 07:58	#8
pondweed This is my second home Waiter, Waiter! I seem to have a Roomster in my drive... Join Date: Nov 2006 Location: Sussex Posts: 3,268 Thanks: 0 Thanked 1 Time in 1 Post	"well, what were the 'intentions' of the last owner" is the first thing that springs to mind...