Throttle still sticking

Dansrockin · 22nd August 2013, 14:54

Hi all, I've had a long running issue with my 190, where every now and again my revs will stick at around 2.5k when I put the clutch in, until I tap the throttle and they drop back to normal.
I've replaced the iacv, checked and lubed the cable, and given everything a good clean, but it's still happening. It looks as though occasionally the spring isn't returning the butterfly all the way closed, and if I press the linkage down it shuts.
I'm guessing the butterfly return spring is getting worn, or there is more grime in the linkage area that I can't get to.
Any ideas on how to sort it, or is it just a case of replacing the tb?
Cheers
Dan

sikelsh · 22nd August 2013, 15:42

Have a look inside the throttle body, it may be gunky in there

bubs · 22nd August 2013, 15:43

Do they have a throttle position sensor on the pedal?

Dansrockin · 22nd August 2013, 16:02

I've cleaned all inside the tb, the only place there could be dirt left is inside the actual butterfly spindle that goes through the tb or inside the spring mechanism.
The only way I can see to clean that is to actually disassemble the spring mechanism from the side of the tb and take the butterfly our, which I don't really fancy doing!

22nd August 2013, 14:54	#1
Dansrockin Posted a thing or two MG ZT number 1 of 25 celestial!! Join Date: Feb 2012 Location: Banbury Posts: 1,967 Thanks: 208 Thanked 242 Times in 166 Posts	Throttle still sticking Hi all, I've had a long running issue with my 190, where every now and again my revs will stick at around 2.5k when I put the clutch in, until I tap the throttle and they drop back to normal. I've replaced the iacv, checked and lubed the cable, and given everything a good clean, but it's still happening. It looks as though occasionally the spring isn't returning the butterfly all the way closed, and if I press the linkage down it shuts. I'm guessing the butterfly return spring is getting worn, or there is more grime in the linkage area that I can't get to. Any ideas on how to sort it, or is it just a case of replacing the tb? Cheers Dan

22nd August 2013, 15:42	#2
sikelsh This is my second home MGF Join Date: Mar 2010 Location: Boston Posts: 4,865 Thanks: 123 Thanked 281 Times in 178 Posts	Have a look inside the throttle body, it may be gunky in there __________________ Si Kelsh

22nd August 2013, 15:43	#3
bubs Posted a thing or two ROVER 75 Join Date: Oct 2012 Location: Canvey Island, Essex Posts: 1,651 Thanks: 43 Thanked 163 Times in 134 Posts	Do they have a throttle position sensor on the pedal?

22nd August 2013, 16:02	#4
Dansrockin Posted a thing or two MG ZT number 1 of 25 celestial!! Join Date: Feb 2012 Location: Banbury Posts: 1,967 Thanks: 208 Thanked 242 Times in 166 Posts	I've cleaned all inside the tb, the only place there could be dirt left is inside the actual butterfly spindle that goes through the tb or inside the spring mechanism. The only way I can see to clean that is to actually disassemble the spring mechanism from the side of the tb and take the butterfly our, which I don't really fancy doing!