KV6 suddenly misfiring

Dawn · 3rd January 2018, 02:01

The V6 suddenly decided to start misfiring when it was picked up for mot last night. What are the most common causes, as I am worried it could be something I can't afford �� Kayleigh mentioned a bad plug or coil pack could do it, which wouldn't be so bad, but what else?

Every time I go out in one of them its something lately ��

Lord of Hog · 3rd January 2018, 07:00

If it misfires when warm and under load then plugs or coil packs could well be the culprits. Warm it up and try accelerating up a hill in a higher gear than necessary. That normally overloads a dying plug or coil enough to get it to misbehave. Otherwise it may be a fuel related issue such as dirt or the dreaded orange clip.

Dawn · 3rd January 2018, 09:11

They took it for mot, management light has come and they'd saying lamda sensor which I only had last year. Its failed on stuff I checked at the weekend, or stuff replaced already like rear handbrake, etc etc. Bit annoyed. If the bill is a few hundred I am going to break it. Fed up of doing the same jobs and can't afford it.

EHD1978 · 3rd January 2018, 16:28

I have the same problem with my KV6 Contemporary SE. I'll be fitting new coil packs and plugs as soon as I have time.

Dawn · 3rd January 2018, 16:44

I don't know what it is, one minute they say sensor, then the next a coil pack or both...I am at my wits end with it. I don't even have the failure sheet, because they aren't bringing it back until tomorrow. The engine light is on and the emission no good as well now.

Fed isn't the word.

SD1too · 3rd January 2018, 17:09

Quote:

Originally Posted by Dawn

Fed isn't the word.

I know Dawn, and it's January! Christmas is over and it's cold and bleak. The last thing we want is problems with the car.

Quote:

I don't know what it is, one minute they say sensor, then the next a coil pack or both...

That's because they don't know either!

Is there a T4 near you? That should tell you which cylinder is affected which will make the repair easier.

Quote:

The engine light is on and the emission no good as well now.

The 'check engine light' is indicating an emissions problem which will be the result of the misfire. So you only have one fault.

I could sell you my Citroën. The 'check engine' light has been on for a year ever since I renewed a faulty ignition module. The emissions are good enough to pass the MOT. If you can solve that problem you might get a reward.

2018 is going to be better Dawn. It has to be. Don't let your car get you down.

Simon

Dawn · 3rd January 2018, 17:30

I can't afford to fix it - the only option I see is sell as spares or repairs or break it. I don't want to do either, but |I can't have it sat on my drive, I need the money for a towbar for the Toyota by the looks of it.

Coups · 3rd January 2018, 17:39

Quote:

Originally Posted by Dawn

I can't afford to fix it - the only option I see is sell as spares or repairs or break it. I don't want to do either, but |I can't have it sat on my drive, I need the money for a towbar for the Toyota by the looks of it.

Don’t despair yet Dawn! It might be a cheap fix. The lambda sensor will be picking up unburnt fuel through the exhaust and activating the engine management light. A poorly coil pack, spark plug or HT lead could be at fault. All cheap fixes! Any decent garage should be able to tell you which cylinder isn’t firing. T4 will help but if that’s all it is a T4 isn’t necessary.

With regards other failure items, you can check them online by entering you’re number plate on the mot enquiry .gov website. Sorry can’t remember the address but a quick google will bring it up.

Don’t despair.

Sent from my iPhone using Tapatalk

Dawn · 3rd January 2018, 17:51

I am despairing, they want £500 or more to do it!

steve-45 · 3rd January 2018, 17:56

Quote:

Originally Posted by Dawn

I am despairing, they want £500 or more to do it!

Their prices seem to be climbing rapidly. I used them a few years ago and they were then quoting really competitive prices.

3rd January 2018, 02:01	#1
Dawn I really should get out more....... MG ZT 180+ auto Join Date: May 2016 Location: Ilkeston, Derbys Posts: 2,743 Thanks: 285 Thanked 1,128 Times in 504 Posts	KV6 suddenly misfiring The V6 suddenly decided to start misfiring when it was picked up for mot last night. What are the most common causes, as I am worried it could be something I can't afford �� Kayleigh mentioned a bad plug or coil pack could do it, which wouldn't be so bad, but what else? Every time I go out in one of them its something lately ��

3rd January 2018, 07:00	#2
Lord of Hog Gets stuck in Rover 75 2.5 V6 in Wedgwood Blue Join Date: Dec 2015 Location: Felbridge, East Grinstead Posts: 982 Thanks: 250 Thanked 294 Times in 206 Posts	If it misfires when warm and under load then plugs or coil packs could well be the culprits. Warm it up and try accelerating up a hill in a higher gear than necessary. That normally overloads a dying plug or coil enough to get it to misbehave. Otherwise it may be a fuel related issue such as dirt or the dreaded orange clip. __________________ Conformity is not morality. Consensus is not truth.

3rd January 2018, 16:28	#4
EHD1978 Avid contributor Rover 75 Tourer & MG ZT 190 SE Join Date: Aug 2015 Location: Ipswich Posts: 193 Thanks: 52 Thanked 42 Times in 23 Posts	I have the same problem with my KV6 Contemporary SE. I'll be fitting new coil packs and plugs as soon as I have time. __________________ Ed 2004 Rover 75 Contemporary SE Tourer 2.5 2004 MG ZT 190 SE (Car number 96 of 151)

3rd January 2018, 09:11	#3
Dawn I really should get out more....... MG ZT 180+ auto Join Date: May 2016 Location: Ilkeston, Derbys Posts: 2,743 Thanks: 285 Thanked 1,128 Times in 504 Posts	They took it for mot, management light has come and they'd saying lamda sensor which I only had last year. Its failed on stuff I checked at the weekend, or stuff replaced already like rear handbrake, etc etc. Bit annoyed. If the bill is a few hundred I am going to break it. Fed up of doing the same jobs and can't afford it.

3rd January 2018, 16:44	#5
Dawn I really should get out more....... MG ZT 180+ auto Join Date: May 2016 Location: Ilkeston, Derbys Posts: 2,743 Thanks: 285 Thanked 1,128 Times in 504 Posts	I don't know what it is, one minute they say sensor, then the next a coil pack or both...I am at my wits end with it. I don't even have the failure sheet, because they aren't bringing it back until tomorrow. The engine light is on and the emission no good as well now. Fed isn't the word.

3rd January 2018, 17:30	#7
Dawn I really should get out more....... MG ZT 180+ auto Join Date: May 2016 Location: Ilkeston, Derbys Posts: 2,743 Thanks: 285 Thanked 1,128 Times in 504 Posts	I can't afford to fix it - the only option I see is sell as spares or repairs or break it. I don't want to do either, but \|I can't have it sat on my drive, I need the money for a towbar for the Toyota by the looks of it.

3rd January 2018, 17:51	#9
Dawn I really should get out more....... MG ZT 180+ auto Join Date: May 2016 Location: Ilkeston, Derbys Posts: 2,743 Thanks: 285 Thanked 1,128 Times in 504 Posts	I am despairing, they want £500 or more to do it!