engine loseing power

donnyboy · 13th August 2011, 21:55

Hi All
I hope someone can help with a problem that i am having with my rover 75 conni 2ltr diesel tourer (2002).
The problem i have is, as i am driving along the engines power goes just as if you have taken youre foot of the pedal, and if you put the pedal down harder nothing happens, no warning lights come on, and the engine is still running, but the car slows down to about 20 mph then all at once power will kick back in for a while, then it could happen again.
it doesn't do it all the time. but it seems to happen when the car has warmed up.
i have just had a service (oil change, and fuel/air/oil filters).
sometimes if you try to pull away quck putting your foot down this can happen for a few seconds. so have to be easy on the pedal.
What can i do and where to start looking?
Thanks in advance.
Donnyboy

suffolk boy · 13th August 2011, 22:05

try disconecting the maf and see if that makes any diffrence

donnyboy · 13th August 2011, 22:15

Hi Suffolk Boy.
Please can you tell me where the maf is as i know nothing about cars.

Thank-you for your quick reply.

Starman · 13th August 2011, 22:20

Hi donnyboy. Welcome along to the forum.
How well do you know your engine?
As Sufolk boy says it could be your MAF. It lives under the lip of the air filter behind the oil filler cap.
Try this page

http://tuning-diesels.com/75Zt/R75maf.htm

This is a page from one of our members Rover Ron who is very knowledgeable.

Regards. Steve.

donnyboy · 13th August 2011, 22:25

Hi Starman
I will try in morning. Thank-you
Will the car run ok if the maf sensor is unpluged?

suffolk boy · 13th August 2011, 22:25

i thought that might be the next question

its is under the air filter cover next to the oil filler.remove the big cover over the engine x 3 10mm bolts.then take of the cover over the air filter from memory x 4 allen bolts x2 are on top x 2 are at the back you need a long allen key to undo them.take off oil filler cap then remove cover.you will then see a plug on the engine next to the oil filler unplug it .ps replace oil filler cap asap or stuff some rag in it you dont want to drop anythink down there belive me

hope fully your car will run better if it does its new maf time

Starman · 13th August 2011, 22:37

Quote:

Originally Posted by donnyboy

Hi Starman
I will try in morning. Thank-you
Will the car run ok if the maf sensor is unpluged?

It will run yes. Not optimal as the engine ECU goes into fall back mode thinking the MAF is dead. But if your MAF is faulty... It will run better..

Sorry Sufolk boy. Didn't mean to step on your keys

Regards. Steve.

suffolk boy · 13th August 2011, 22:40

no worries glad we are both think along the same lines i hope this sorts it

just annoyed i cannot remember the allen key size!is it m5?

Starman · 13th August 2011, 22:45

Oooh now you're asking.... You know ive got a bit in the end of a multi driver which I keep in the boot just in case.... Except...it's gone AWOL

Just had a look for it.

Pretty sure your right.

Regards. Steve.

13th August 2011, 21:55	#1
donnyboy Newbie ROVER 75 CONNOISSEUR SE CDT TOU Join Date: Mar 2010 Location: WOOLPIT Posts: 10 Thanks: 10 Thanked 0 Times in 0 Posts	engine loseing power Hi All I hope someone can help with a problem that i am having with my rover 75 conni 2ltr diesel tourer (2002). The problem i have is, as i am driving along the engines power goes just as if you have taken youre foot of the pedal, and if you put the pedal down harder nothing happens, no warning lights come on, and the engine is still running, but the car slows down to about 20 mph then all at once power will kick back in for a while, then it could happen again. it doesn't do it all the time. but it seems to happen when the car has warmed up. i have just had a service (oil change, and fuel/air/oil filters). sometimes if you try to pull away quck putting your foot down this can happen for a few seconds. so have to be easy on the pedal. What can i do and where to start looking? Thanks in advance. Donnyboy

13th August 2011, 22:05	#2
suffolk boy This is my second home fiat panda Join Date: Sep 2009 Location: haverhill Posts: 6,720 Thanks: 96 Thanked 586 Times in 526 Posts	try disconecting the maf and see if that makes any diffrence __________________ fiat panda 1.2 eco

13th August 2011, 22:20	#4
Starman Posted a thing or two 03 CDTi Tourer Conn SE auto Join Date: Jul 2007 Location: Shrewsbury Posts: 1,405 Thanks: 0 Thanked 15 Times in 4 Posts	Hi donnyboy. Welcome along to the forum. How well do you know your engine? As Sufolk boy says it could be your MAF. It lives under the lip of the air filter behind the oil filler cap. Try this page http://tuning-diesels.com/75Zt/R75maf.htm This is a page from one of our members Rover Ron who is very knowledgeable. Regards. Steve. __________________ [SIGPIC][/SIGPIC]

13th August 2011, 22:25	#6
suffolk boy This is my second home fiat panda Join Date: Sep 2009 Location: haverhill Posts: 6,720 Thanks: 96 Thanked 586 Times in 526 Posts	i thought that might be the next question its is under the air filter cover next to the oil filler.remove the big cover over the engine x 3 10mm bolts.then take of the cover over the air filter from memory x 4 allen bolts x2 are on top x 2 are at the back you need a long allen key to undo them.take off oil filler cap then remove cover.you will then see a plug on the engine next to the oil filler unplug it .ps replace oil filler cap asap or stuff some rag in it you dont want to drop anythink down there belive mehope fully your car will run better if it does its new maf time __________________ fiat panda 1.2 eco

13th August 2011, 22:40	#8
suffolk boy This is my second home fiat panda Join Date: Sep 2009 Location: haverhill Posts: 6,720 Thanks: 96 Thanked 586 Times in 526 Posts	no worries glad we are both think along the same lines i hope this sorts itjust annoyed i cannot remember the allen key size!is it m5? __________________ fiat panda 1.2 eco

13th August 2011, 22:15	#3
donnyboy Newbie ROVER 75 CONNOISSEUR SE CDT TOU Join Date: Mar 2010 Location: WOOLPIT Posts: 10 Thanks: 10 Thanked 0 Times in 0 Posts	Hi Suffolk Boy. Please can you tell me where the maf is as i know nothing about cars. Thank-you for your quick reply.

13th August 2011, 22:45	#9
Starman Posted a thing or two 03 CDTi Tourer Conn SE auto Join Date: Jul 2007 Location: Shrewsbury Posts: 1,405 Thanks: 0 Thanked 15 Times in 4 Posts	Oooh now you're asking.... You know ive got a bit in the end of a multi driver which I keep in the boot just in case.... Except...it's gone AWOL Just had a look for it. Pretty sure your right. Regards. Steve. __________________ [SIGPIC][/SIGPIC]