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19th May 2020, 18:38 | #1 |
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Rover 75 Saloon & MGZT 190 Join Date: Jun 2012
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Video showing over revving MGZT 190
Hi Everybody
Im still trying to find out why my Car holds its revs up when coming upto a junction when cold,Ive tried different throttle control valve and new kit and cleaned many times,All linkage is free and working correctly. I have tried another potentiometer also and no change.I cant find any air leaks and if i cover the Brass inlet on throttle body it stalls the car so im thinking no air leaks. Im not sure if you can see in the video after revving it up it holds the RPM for a little while before dropping the RPM ? Its much worse when you pull up at a junction holding the RPMs at 1500 or above when cold. Not sure if the video shows the problem well enough as it was just sitting. here is a link to it on youtube as was to big for forum. https://www.youtube.com/watch?v=vO3XPBMG-0g Any help appreciated.
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This vehicle was the 53,401st 75 to run off the production line, out of 112,381 This vehicle was the 2,551st 75 CDT Club to be made out of 3,403 This vehicle was the 5,192nd 75 in White Gold Metallic (code: GMN) to be made out of 12,251 White Gold Metallic 75s My New Addition MGZT 190 Trophy Blue 2001 Petrol. |
19th May 2020, 18:43 | #2 |
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MG ZT 2.0 CDTI+ in Typhoon, MG TF 135 in Typhoon & Rover 75 Connoisseur CDTI SE in Pearl Black Join Date: Oct 2012
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Mine was doing a very similar thing, turned out it was 2 things:
1. I had a split in one of the breather hoses. Replaced the hose. 2. I had a sticky throttle body. Gave it a good clean with carb cleaner which sorted it. |
19th May 2020, 18:53 | #3 |
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Rover 75 Saloon & MGZT 190 Join Date: Jun 2012
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Posts: 390
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Hi and thanks for fast reply,Ive checked all breather pipes for cracks or leaks but everything looks sound,Ive cleaned throttle body many times and even tried a secondhand throttle body but the problem persists.
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This vehicle was the 53,401st 75 to run off the production line, out of 112,381 This vehicle was the 2,551st 75 CDT Club to be made out of 3,403 This vehicle was the 5,192nd 75 in White Gold Metallic (code: GMN) to be made out of 12,251 White Gold Metallic 75s My New Addition MGZT 190 Trophy Blue 2001 Petrol. |
20th May 2020, 21:34 | #4 |
Gets stuck in
MG ZT-T Join Date: Aug 2015
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I'd suspect a fault in the pedal, remove it and clean whatever you can, can't hurt.
My Astra Van had a similar thing, I hit the pedal box with a hammer and that sorted it lol |
25th May 2020, 02:28 | #5 |
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MG ZT 190+ Join Date: Feb 2013
Location: Canberra
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My 2003 ZT190 has the exact same problem.
Like you, I have checked hoses and throttle body to no avail. It has to be something simple - but just what, eludes me. The car performs beautifully in all other respects. I'll follow your thread in the hope that someone has an answer for you (us). Regards |
25th May 2020, 02:29 | #6 |
Gets stuck in
MG ZT-T Join Date: Jun 2016
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Mine was the throttle body. I gave the butterfly pivot and spring a couple of good soakings with penetrating oil and it freed up.
I suspected it was the throttle cable and ordered a replacement but that's now sitting on the shelf as a spare.
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ZT-T190, Anthracite, LHD, Left the Line on June 24, 2002, Sold new in Switzerland, spent time in Germany, Imported to Canada in September 2021 |
25th May 2020, 07:46 | #7 | |
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Rover 75 Saloon & MGZT 190 Join Date: Jun 2012
Location: Leek
Posts: 390
Thanks: 333
Thanked 57 Times in 39 Posts
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Quote:
Ive checked all butterfly pivot,Completely free and cable also foot pedal linkage even replaced the entire throttle body from another car but as yet no luck. Cheers julian
__________________
This vehicle was the 53,401st 75 to run off the production line, out of 112,381 This vehicle was the 2,551st 75 CDT Club to be made out of 3,403 This vehicle was the 5,192nd 75 in White Gold Metallic (code: GMN) to be made out of 12,251 White Gold Metallic 75s My New Addition MGZT 190 Trophy Blue 2001 Petrol. |
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