190 V6 lacking power - Page 2

deeks · 11th October 2013, 22:56

Oh believe me its flat out. No oomph at all.

guru · 12th October 2013, 00:21

Yep, it'll be the VIS motors, I didn't realise just how much power mine had lost until Jules replaced them.....makes a massive difference!

kaiser · 12th October 2013, 03:56

To be fair, it can be caused by a number of things.

Generally the V6 is not the fastest thing around, and it lacks the torque you would expect from an engine this size, especially at the lower end. So to get performance out of the thing, you really need to bury your right foot in the carpet, in a most un-gentlymanlike clinch-biting determined fashion.

If, for any reason, you are not able to get the thing up in revs, it is dead in the water, and an average 1600 will outpace it with commensurate ease.

So to go through a list of possibles, you would need to look at
1. Check that the accelerator cable is correctly adjusted, very little or no slack!. Pay special attention to the plastic cable stop at the throttle body.
2. remove any restriction under the accelerator pedal.
3. Check the cam timing. With so many people fiddling with the sprockets on the cams, it is entirely possible some person has got something wrong.
4. Check the exhaust system is unblocked, the cat might have partially collapsed. De cat if possible.
5. the VIS motors might have seized to work, and some of the plastic flap valves might have stuck in closed position in the plastic inlet manifold. That could possibly be cured by giving attention to the motors.
6. Then again it might not, if they (the flap "power"

valves) in the manifold have parted company from the actuator rod. Then that can only be rectified by replacing the inlet manifold! I split my casing and removed them. They have never bothered me again!

One of the better modification I have done!
7. It is possible that there could be fuel or ignition related issues as well, but since you have not complained of erratic running, I have not mentioned those.

If I were you, I would find someone with another V6 and compare, for starters. It does sound as if yours is particularly slow.

And just a general word of warning. Check the water level in the cooling system, and check it often!

Paulontour · 12th October 2013, 07:08

Quote:

Originally Posted by deeks

I have just got my v6 on the road and the first time I have driven it. It appears to lack power on acceleration, definitely what I expected having had 3 diesels. Sounds nice when revving up but seems sluggish when putting foot down. This can't be right?
Deeks

Your only down the road from me. Give me a shout if you want to ride in a car with working VIS.

MrDoodles · 12th October 2013, 13:49

As others have said, get your VIS motors checked, but please also bear in mind, that it's a very different style of driving!

The CDT is flat out at 4,000 rpm, whereas a 190 will just be getting into it's stride at 4,000 rpm and has another 2,500 rpm to go!

12th October 2013, 00:21	#12
guru Posted a thing or two MG ZT, Rover Sterling, MG ZS EV & BMW X5 Join Date: Nov 2010 Location: The Norfolk Broads Posts: 1,491 Thanks: 20 Thanked 196 Times in 117 Posts	Yep, it'll be the VIS motors, I didn't realise just how much power mine had lost until Jules replaced them.....makes a massive difference! __________________ My car history http://m6jkk.com

12th October 2013, 03:56	#13
kaiser This is my second home 75 Tourer 2.5 Auto, 1.8T, 75V8ZT Join Date: Jun 2007 Location: Johannesburg ZA Posts: 6,200 Thanks: 1 Thanked 859 Times in 613 Posts	To be fair, it can be caused by a number of things. Generally the V6 is not the fastest thing around, and it lacks the torque you would expect from an engine this size, especially at the lower end. So to get performance out of the thing, you really need to bury your right foot in the carpet, in a most un-gentlymanlike clinch-biting determined fashion. If, for any reason, you are not able to get the thing up in revs, it is dead in the water, and an average 1600 will outpace it with commensurate ease. So to go through a list of possibles, you would need to look at 1. Check that the accelerator cable is correctly adjusted, very little or no slack!. Pay special attention to the plastic cable stop at the throttle body. 2. remove any restriction under the accelerator pedal. 3. Check the cam timing. With so many people fiddling with the sprockets on the cams, it is entirely possible some person has got something wrong. 4. Check the exhaust system is unblocked, the cat might have partially collapsed. De cat if possible. 5. the VIS motors might have seized to work, and some of the plastic flap valves might have stuck in closed position in the plastic inlet manifold. That could possibly be cured by giving attention to the motors. 6. Then again it might not, if they (the flap "power"valves) in the manifold have parted company from the actuator rod. Then that can only be rectified by replacing the inlet manifold! I split my casing and removed them. They have never bothered me again! One of the better modification I have done! 7. It is possible that there could be fuel or ignition related issues as well, but since you have not complained of erratic running, I have not mentioned those. If I were you, I would find someone with another V6 and compare, for starters. It does sound as if yours is particularly slow. And just a general word of warning. Check the water level in the cooling system, and check it often!

11th October 2013, 22:56	#11
deeks Posted a thing or two MG ZT 2.0 DIESEL Join Date: Sep 2010 Location: Barwell Posts: 1,037 Thanks: 12 Thanked 10 Times in 10 Posts	Oh believe me its flat out. No oomph at all.

12th October 2013, 13:49	#15
MrDoodles Banned MG ZT+ V6 190 Join Date: Nov 2011 Location: Spalding Posts: 13,245 Thanks: 369 Thanked 1,196 Times in 818 Posts	As others have said, get your VIS motors checked, but please also bear in mind, that it's a very different style of driving! The CDT is flat out at 4,000 rpm, whereas a 190 will just be getting into it's stride at 4,000 rpm and has another 2,500 rpm to go!