More about Jerky running

Kenneth Smith · 18th September 2019, 16:36

Hi everyone, Chris from Fareham has suggested that my 'Jerky' running maybe because my Cat Converter is breaking up and inhibiting the exhaust. The rough running is sometimes minor and mostly stops when car warmed up and sometimes it's quite bad. Any ideas. I have changed, Plugs, Coils, MAP Sensor, Filters and Boost Solenoid. Regards Ken

Mark Murphy · 18th September 2019, 19:30

Check for inlet air leaks,(manifold gasket?) and vacuum hoses.

Yorkshire GOC · 19th September 2019, 18:16

Have you checked that the hoses leading to the turbo from the pierburg boost valve are not loose at the turbo -if they are it leads to lumpy running.

Kenneth Smith · 24th September 2019, 15:20

Hi, Thank you both for suggestions, much appreciated. Funny thing is the 'Jerky running' has stopped on it's own. Very pleased but have no idea why. Regards Ken

18th September 2019, 16:36	#1
Kenneth Smith Avid contributor Rover 75 1.8T Tourer Join Date: Jan 2010 Location: Hayling Island Posts: 214 Thanks: 56 Thanked 7 Times in 7 Posts	More about Jerky running Hi everyone, Chris from Fareham has suggested that my 'Jerky' running maybe because my Cat Converter is breaking up and inhibiting the exhaust. The rough running is sometimes minor and mostly stops when car warmed up and sometimes it's quite bad. Any ideas. I have changed, Plugs, Coils, MAP Sensor, Filters and Boost Solenoid. Regards Ken

19th September 2019, 18:16	#3
Yorkshire GOC I really should get out more....... Rover 75 connoisseur se v6 auto Join Date: May 2014 Location: Hull Posts: 2,062 Thanks: 1,842 Thanked 623 Times in 469 Posts	Have you checked that the hoses leading to the turbo from the pierburg boost valve are not loose at the turbo -if they are it leads to lumpy running. __________________ She came off the Longbridge Line on 20-05-2003 The Silver Machine was the 13th of 160 Rover 75's to come off the production line that day and is the 100th of 527 Starlight Silver Rover 75 2.5 V6 Connoisseur SE Auto saloons listed in the build records produced world wide.

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18th September 2019, 19:30	#2
Mark Murphy Regular poster Rover 75, and Mg zt 1.8T Join Date: Aug 2019 Location: Huntingdon Posts: 92 Thanks: 302 Thanked 23 Times in 22 Posts	Check for inlet air leaks,(manifold gasket?) and vacuum hoses.

24th September 2019, 15:20	#4
Kenneth Smith Avid contributor Rover 75 1.8T Tourer Join Date: Jan 2010 Location: Hayling Island Posts: 214 Thanks: 56 Thanked 7 Times in 7 Posts	Hi, Thank you both for suggestions, much appreciated. Funny thing is the 'Jerky running' has stopped on it's own. Very pleased but have no idea why. Regards Ken