2.5 V6 Auto 75 - Idle Revs Dropped

frostybot1977 · 24th September 2019, 10:24

I bought my car a few days ago and it's the first petrol one I've had. I was quite surprised as the idle revs felt quite high (about 1,000 rpm), and as soon as you lift your foot off the break it went off quit fast compared to my diesels. I know there is more torque. Today, while waiting at a junction, the revs dropped and it nearly stalled. I quickly put it in neutral and it stopped the stall, with the revs idling at about 600 rpm. Home was only 5 minutes away but after this the car continued to idle at 600 rpm at each junction whether in Neutral or Drive (brakes on).

vitesse · 24th September 2019, 10:40

Turn the ignition key to position 2 do not start it, and depress the throttle pedal fully five times in succession.

Turn off the ignition, then start the car.

Regards

And thanks to MarinaBrian for the tip

SD1too · 24th September 2019, 12:20

Quote:

Originally Posted by vitesse

Turn the ignition key to position 2 do not start it, and depress the throttle pedal fully five times in succession.
Turn off the ignition, then start the car ...
And thanks to MarinaBrian for the tip

Mike,

That procedure is from RAVE for the MEMS3 engine management fitted to 1.8 litre cars. It is to set the 'closed throttle position'.

It apparently doesn't apply to the Siemens 2000 engine management fitted to the KV6 engine. I quote from RAVE:
"The ECM does not require the 'closed throttle position' to be set. It will learn the closed throttle position over a short period of time and adapt itself to use this value".

Simon

vitesse · 24th September 2019, 12:38

OK thanks Simon - I can now delete it from my "car stuff" library on my harddrive, needed cleaning out a bit

Mike

frostybot1977 · 24th September 2019, 12:46

Quote:

Originally Posted by SD1too

Mike,

That procedure is from RAVE for the MEMS3 engine management fitted to 1.8 litre cars. It is to set the 'closed throttle position'.

It apparently doesn't apply to the Siemens 2000 engine management fitted to the KV6 engine. I quote from RAVE:
"The ECM does not require the 'closed throttle position' to be set. It will learn the closed throttle position over a short period of time and adapt itself to use this value".

Simon

Yeah, didn't increase revs from 600. Drives and accelerates fine though.

dattrike · 24th September 2019, 13:02

Have a look at this old thread
https://the75andztclub.co.uk/forum/s...d.php?t=197570

24th September 2019, 10:24	#1
frostybot1977 Regular poster Rover 75 Saloon 2.5 V6 Connoisseur Join Date: Apr 2016 Location: Exeter Posts: 61 Thanks: 18 Thanked 65 Times in 18 Posts	2.5 V6 Auto 75 - Idle Revs Dropped I bought my car a few days ago and it's the first petrol one I've had. I was quite surprised as the idle revs felt quite high (about 1,000 rpm), and as soon as you lift your foot off the break it went off quit fast compared to my diesels. I know there is more torque. Today, while waiting at a junction, the revs dropped and it nearly stalled. I quickly put it in neutral and it stopped the stall, with the revs idling at about 600 rpm. Home was only 5 minutes away but after this the car continued to idle at 600 rpm at each junction whether in Neutral or Drive (brakes on).

24th September 2019, 13:02	#6
dattrike Posted a thing or two V6 2ltr auto in copperleaf +CDTI Auto in Royal Blue on loan to Son Join Date: Jul 2010 Location: Tewkesbury, Gloucestershire Posts: 1,707 Thanks: 105 Thanked 476 Times in 267 Posts	Have a look at this old thread https://the75andztclub.co.uk/forum/s...d.php?t=197570 __________________

24th September 2019, 10:40	#2
vitesse I really should get out more....... Rover 75 Saloon Join Date: Jul 2011 Location: Gävle Posts: 2,528 Thanks: 395 Thanked 823 Times in 652 Posts	Turn the ignition key to position 2 do not start it, and depress the throttle pedal fully five times in succession. Turn off the ignition, then start the car. Regards And thanks to MarinaBrian for the tip

24th September 2019, 12:38	#4
vitesse I really should get out more....... Rover 75 Saloon Join Date: Jul 2011 Location: Gävle Posts: 2,528 Thanks: 395 Thanked 823 Times in 652 Posts	OK thanks Simon - I can now delete it from my "car stuff" library on my harddrive, needed cleaning out a bit Mike