75 V6 fluctuating idle when warm - Page 2

SD1too · 23rd January 2021, 12:47

The same as for the 2.5 litre V6 Josh, manual or automatic transmission, 750 ± 50 rpm.

Simon

Pruts3r · 24th January 2021, 18:51

I had the same. Cold it would run beautiful but after a few minute drive when ever I stopped it would idle like it would stall and the rev a bit and drop again, rev a bit and drop again. Like a pulse.

The moment we touched this 90 degrees tube it would immediately stop and idle perfect. I had the PPD brass angle piece on it from my own original engine and put it back after swapping the engine because it looks nicer and is PPD. After we discovered this was where the idle trouble came from we put the newer plastic one in in place of the brass one and all was cured.

It is the thing right in the middle of the shot:

david75 · 24th January 2021, 21:34

I had a similar, but not identical problem.
See my thread here, especially post #15
https://the75andztclub.co.uk/forum/s...d.php?t=302496
I hope that helps

23rd January 2021, 12:47	#11
SD1too Doesn't do things by halves Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007 Location: Former Middlesex Posts: 20,344 Thanks: 1,587 Thanked 3,749 Times in 3,181 Posts	The same as for the 2.5 litre V6 Josh, manual or automatic transmission, 750 ± 50 rpm. Simon __________________ "Whatever is rightly done, however humble, is noble." Sir Henry Royce.

24th January 2021, 18:51	#12
Pruts3r Avid contributor 1999 Rover 75 Sterling - Pewter Grey - Aubergine Leather & 1985 Rover 3500 Vitesse - Targa Red Join Date: Aug 2016 Location: Rotterdam Posts: 122 Thanks: 40 Thanked 19 Times in 13 Posts	I had the same. Cold it would run beautiful but after a few minute drive when ever I stopped it would idle like it would stall and the rev a bit and drop again, rev a bit and drop again. Like a pulse. The moment we touched this 90 degrees tube it would immediately stop and idle perfect. I had the PPD brass angle piece on it from my own original engine and put it back after swapping the engine because it looks nicer and is PPD. After we discovered this was where the idle trouble came from we put the newer plastic one in in place of the brass one and all was cured. It is the thing right in the middle of the shot: __________________ '99 Rover 75 sterling 2.5 auto in Pewter grey with Aubergine interior •Born on Wednesday the 23rd of June 1999 @ 11:35:32 •The 6367th 75 to be produced. •The 214th Pewter Grey 75 out of 442. •Probably one of a handful Pewters with Aubergine. Last edited by Pruts3r; 25th January 2021 at 19:15..

24th January 2021, 21:34	#13
david75 Posted a thing or two Rover 75 2.5 V6 Conn SE, 04 Join Date: Sep 2012 Location: Southend Posts: 1,176 Thanks: 544 Thanked 302 Times in 165 Posts	I had a similar, but not identical problem. See my thread here, especially post #15 https://the75andztclub.co.uk/forum/s...d.php?t=302496 I hope that helps