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V50 1.8 Hesitation

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Old Jul 26th, 2019, 18:00   #11
andyv40turbo
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When I had the issue with MAF on V40, another member sent me a spare to try. Perhaps you know someone with the same engine who could loan you? Scrap yard replacement? Someone on ebay breaking?

It ran perfect with the new one in. I believe a way to determine is to drive with the MAF unplugged and see if it runs better. if it does the MAF is kaput.

I also understand they dont take to well to being cleaned. I will try find the thread I had my issues in which where resolved.

Hope you can get it sorted!
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Old Jul 26th, 2019, 18:10   #12
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Old thread here https://www.volvoforums.org.uk/showthread.php?t=170435
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Old Jul 27th, 2019, 20:41   #13
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Originally Posted by Lumpkin View Post
Hi, I have a V50 1.8 2006, with 82k on the clock. The vehicle has developed an annoying intermittent hesitation and lack of power on acceleration. This issue normally appears after the vehicle has been driven for a number of miles and has reached full running temperature, and is more noticeable at higher speeds. There are no eml codes or warn lights on, but have also noticed that the engine sounds a bit rough/vibration if I rev it in neutral between 2000 -2500 rpm. Not sure if the two are linked. I have started with some simple fixes checking for vacuum air leaks (none found), changed spark plugs and a full set of new coil packs, but none have made the slightest change to the symptoms. Has anyone experienced the same and found the cause?


I have a C30 1.8 2007, some weeks ago the car has a issue with a lack of power under 3000rpm, we replace a solenoid that control the swirl flaps,sparks and air filter and the issue disappeared

The part n° of the solenoid its 31375551, https://rover.ebay.com/rover/0/0/0?m...2F322362246257
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Old Jul 27th, 2019, 21:52   #14
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Originally Posted by Fede984 View Post
I have a C30 1.8 2007, some weeks ago the car has a issue with a lack of power under 3000rpm, we replace a solenoid that control the swirl flaps,sparks and air filter and the issue disappeared

The part n° of the solenoid its 31375551, https://rover.ebay.com/rover/0/0/0?m...2F322362246257
that usually stores a fault code when that goes faulty , it might not put the light on though .
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Old Aug 1st, 2019, 20:02   #15
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The 1.8 engine in the V50 does not have a MAF sensor. I think you're referring to the MAP sensor. Is it the little thing screwed into the bottom of the plastic manifold? If so it will be covered in oil, because (sensibly) they put it straight opposite the oil breather in there.

I'm having exactly the same issues though with (what was) my V50 1.8 and I'm at a loss! No engine light or fault codes though. EGR occasionally sticking open possibly? Or the throttle bodies sometimes play up. Don't want to go spending money on part after part trying to diagnose the problem though.

EDIT: Hence why the sensor you're finding is only £25. MAP's are pretty cheap, MAF's are expensive.
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Old Aug 24th, 2019, 14:00   #16
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So I'm having this very slight hesitation between 2500-3000 rpm. No codes, no major acceleration problems, however you can feel a very light dip in acceleration twice between 2500 and 3000rpm. looking at the rpm needle there is no noticeable 'dip'

It only happens after the engine is warmed up. And if you floor it with warm engine and the stumble around 2800rpm happens and you slowly lift your food of the accelerator it actually starts to accelerate a little bit better
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Old Sep 13th, 2019, 15:05   #17
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back in 2006 there was a mod to fix a loose throttle housing plug .
if you try to wiggle the black plastic plug it should be very firm ...
Clan i tried to send a pm and it wouldnt let me

Hi clan , i hear your the best in the business on here so thought id ask. got a 2.0d 2008 v50 . it has single throttle body and cant see any signs of a dpf. we did find a dpf pressure sensor lying under a seat though when we bought it.

I had an issue where revs would stutter at 1800 to 2000 rpm, a few ways resolved that, disconnected maf, driving hard or towing. now disconnected egr and blocked it and its fine that way.

But my issue now is, and had it before the egr was blocked off. sometimes and getting worse now, the car doesnt start correctly, no throttle response, heavy black smoke out back, and some smoke from back of the engine, i think below the egr. throttle been cleaned but im told i should shave it a bit so it doesnt / cant stick. any other ideas, thanks
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Old Sep 13th, 2019, 15:09   #18
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Clan i tried to send a pm and it wouldnt let me

Hi clan , i hear your the best in the business on here so thought id ask. got a 2.0d 2008 v50 . it has single throttle body and cant see any signs of a dpf. we did find a dpf pressure sensor lying under a seat though when we bought it.

I had an issue where revs would stutter at 1800 to 2000 rpm, a few ways resolved that, disconnected maf, driving hard or towing. now disconnected egr and blocked it and its fine that way.

But my issue now is, and had it before the egr was blocked off. sometimes and getting worse now, the car doesnt start correctly, no throttle response, heavy black smoke out back, and some smoke from back of the engine, i think below the egr. throttle been cleaned but im told i should shave it a bit so it doesnt / cant stick. any other ideas, thanks
HEllo !
Yes that is typical of the throttle flap you talked about sticking , take the unit off and file around the edge of the flap both sides so that when it is shut you can just see the smallest amount of light through the edges ...
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Old Sep 13th, 2019, 16:08   #19
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Old Sep 14th, 2019, 17:35   #20
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thanks clan. just read your comment, i did that this morning, and so far so good . sorry for commenting someone elses post, buthopefully it helps someone else too. is it ok to run with egr fully blocked and just unplugged.
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