S40 V40 Cars: - Hesitatant acceleration

Lordbob42 · Jun 11th, 2021, 15:22

Hi all!

Just bought a v40 2003 diesel estate for a family car load lugger type thing, for not much cash. It has a very odd prob and before I spend I fortune trying to get it sorted I thought I'd ask you fine guys if you had a idea what maybe up.

So on slight acceleration it hesitates, like a stutter pulsating losing power. Give it a boot full and it's fine. Also fine on motorways at speed.

Any ideas where to look, it has done 180k but kinda hope it'll last a few years before I need to replace.

Thanks in advance!

gatos · Jun 11th, 2021, 16:53

Try unplugging the MAF sensor and see if it makes a difference

Lordbob42 · Jun 12th, 2021, 22:05

Yep! That's stopped it, new one needed then I guess!

Thanks gatos, knew someone would have an idea on it.

gatos · Jun 13th, 2021, 22:52

Quote:

Originally Posted by Lordbob42

Yep! That's stopped it, new one needed then I guess!

Thanks gatos, knew someone would have an idea on it.

It could be the MAF, or it may also be one of the other sensors. When you disconnect the MAF, the ECU uses default values to operate the engine, while ignoring the inputs from all other sensors. So, ideally have the OBD2 codes read first, to see if any faults come up

Lordbob42 · Jun 30th, 2021, 21:55

Yeahhh new maf has helped but still plays up a bit. I'll pop my reader on tomorrow and see what is flagged up on it. Just drove 300 miles cross country in it and it was sweet even with sensor unplugged..

Jun 11th, 2021, 15:22	#1
Lordbob42 New Member Last Online: Jul 1st, 2021 08:52 Join Date: Jun 2021 Location: Preston	Hesitatant acceleration Hi all! Just bought a v40 2003 diesel estate for a family car load lugger type thing, for not much cash. It has a very odd prob and before I spend I fortune trying to get it sorted I thought I'd ask you fine guys if you had a idea what maybe up. So on slight acceleration it hesitates, like a stutter pulsating losing power. Give it a boot full and it's fine. Also fine on motorways at speed. Any ideas where to look, it has done 180k but kinda hope it'll last a few years before I need to replace. Thanks in advance!

Jun 11th, 2021, 16:53	#2
gatos Premier Member Last Online: Nov 15th, 2022 21:34 Join Date: Apr 2010 Location: London / Essex	Try unplugging the MAF sensor and see if it makes a difference __________________ Current car: 2002 S40 1.9D, 1992 240SE Nullius in Verba

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Jun 12th, 2021, 22:05	#3
Lordbob42 New Member Last Online: Jul 1st, 2021 08:52 Join Date: Jun 2021 Location: Preston	Yep! That's stopped it, new one needed then I guess! Thanks gatos, knew someone would have an idea on it.

Jun 30th, 2021, 21:55	#5
Lordbob42 New Member Last Online: Jul 1st, 2021 08:52 Join Date: Jun 2021 Location: Preston	Yeahhh new maf has helped but still plays up a bit. I'll pop my reader on tomorrow and see what is flagged up on it. Just drove 300 miles cross country in it and it was sweet even with sensor unplugged..

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