Go Back   The 75 and ZT Owners Club Forums > The 75 and ZT Owners Club Forums > Technical Help Forum
Register FAQ Image Gallery Members List Calendar Mark Forums Read
Notices

Reply
 
Thread Tools Display Modes
Old 19th January 2020, 12:04   #1
elnoxx
Newbie
 
elnoxx's Avatar
 
Rover 75 Saloon

Join Date: Aug 2019
Location: Stuttgart
Posts: 17
Thanks: 2
Thanked 1 Time in 1 Post
Lightbulb Startup failure

Hi guys,

I have a 2003 Rover 75 2.5L V6 and have been driving it for the past year without any major issues.

Yesterday i drove about 50km to pick something up the car ran just fine with no signs of problems.

I turned the car off and loaded some things in, after climbing back in and starting the car i noticed an unusual sound sort of more deep and rumbling it also vibrated more then usual so i turned the car off again after about a minute of listening.

I tried to re start it right after and it would not start again, it turned on for about 5 sec until the revs fell to 0 and i had to turn it off again.

This reminded me of cold starts i had in the morning every couple of weeks but it would always start right after the 2nd try.

This time it did not i tried about 5-10x waiting a couple of sec between each try and each time the revs fell to 0.

Then i had the idea to wait 10-20min and try again which luckly did work and i drove home fine, it also started fine later that day.

The only thing that was of interest that day was that i filled in fuel before taking the drive and i filled it to 100% which i usually did not do most of the time i fill it to 50-60%.


What was the problem here has someone had the same issue is some part going to fail soon?

Thanks for all the answers.
elnoxx is offline   Reply With Quote
Old 19th January 2020, 12:20   #2
Yorkshire GOC
I really should get out more.......
 
Yorkshire GOC's Avatar
 
Rover 75 connoisseur se v6 auto

Join Date: May 2014
Location: Hull
Posts: 2,057
Thanks: 1,842
Thanked 623 Times in 469 Posts
Default

Failing crank sensor? - when it heats up a failing one will stop working - once it cools off it starts working again. If it is the crank sensor it will fail completely and she wont start. If this happens a good telltale sign is the rev counter/tacho needle will not move when you turn her over as the ECM is not getting data from the sensor.
__________________
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.
Yorkshire GOC is offline   Reply With Quote
Old 20th January 2020, 08:43   #3
SD1too
Doesn't do things by halves
 
SD1too's Avatar
 
Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model.

Join Date: Mar 2007
Location: Former Middlesex
Posts: 20,262
Thanks: 1,587
Thanked 3,749 Times in 3,181 Posts
Default

Quote:
Originally Posted by Yorkshire GOC View Post
Failing crank sensor? - when it heats up a failing one will stop working - once it cools off it starts working again.
Aren't you thinking of the camshaft position sensor here Martin?
Quote:
Originally Posted by elnoxx View Post
This reminded me of cold starts i had in the morning every couple of weeks but it would always start right after the 2nd try.
My first thought Franc is the common problem of loosening of the fuel filter. Lift it up just enough to check whether the securing clip has been fitted. If you search the forum for "FFS" or "orange clip" you can read all about it.

Simon
__________________
"Whatever is rightly done, however humble, is noble."
Sir Henry Royce.
SD1too is online now   Reply With Quote
Old 20th January 2020, 19:58   #4
COLVERT
This is my second home
 
R75 Saloon.

Join Date: Feb 2009
Location: France/or Devon.
Posts: 14,003
Thanks: 3,851
Thanked 2,167 Times in 1,816 Posts
Default

Quote:
Originally Posted by SD1too View Post
Aren't you thinking of the camshaft position sensor here Martin?

My first thought Franc is the common problem of loosening of the fuel filter. Lift it up just enough to check whether the securing clip has been fitted. If you search the forum for "FFS" or "orange clip" you can read all about it.

Simon
Does the petrol engine have a cam sensor ??---
COLVERT is offline   Reply With Quote
Old 20th January 2020, 21:15   #5
chris75
same car since 2005
 
chris75's Avatar
 
2001 Rover 75 2.0 v6 Connoisseur Saloon

Join Date: Nov 2006
Location: Ellesmere Port , Cheshire
Posts: 3,810
Thanks: 379
Thanked 549 Times in 466 Posts
Default

Quote:
Originally Posted by COLVERT View Post
Does the petrol engine have a cam sensor ??---
I hope so …….. I fitted a new one to mine !
__________________
Who said it was simples ?
chris75 is offline   Reply With Quote
Old 20th January 2020, 22:44   #6
richw
Avid contributor
 
Rover 75 Saloon

Join Date: Sep 2017
Location: Stockton-on-Tees
Posts: 243
Thanks: 6
Thanked 64 Times in 49 Posts
Default

I had a similar problem with my V6, and fitted a new camshaft position sensor. Been OK since.

I was never sure about the rev counter moving during cranking/starting, though. I don't recall mine ever doing that, with the old or new sensor! Should it?
richw is offline   Reply With Quote
Old 21st January 2020, 23:08   #7
COLVERT
This is my second home
 
R75 Saloon.

Join Date: Feb 2009
Location: France/or Devon.
Posts: 14,003
Thanks: 3,851
Thanked 2,167 Times in 1,816 Posts
Default

Quote:
Originally Posted by chris75 View Post
I hope so …….. I fitted a new one to mine !
I always though they worked on the Lost Spark principal.--


( Diesel owner. Lol. )
COLVERT is offline   Reply With Quote
Old 22nd January 2020, 09:11   #8
SD1too
Doesn't do things by halves
 
SD1too's Avatar
 
Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model.

Join Date: Mar 2007
Location: Former Middlesex
Posts: 20,262
Thanks: 1,587
Thanked 3,749 Times in 3,181 Posts
Default

Quote:
Originally Posted by COLVERT View Post
I always though they worked on the Lost Spark principal.
That's the 'wasted spark' principle and applies only to the 1.8 litre engine. However both the 1.8 and V6 have a camshaft position sensor. It's there to time the fuel injection according to RAVE. It has nothing to do with the spark.

You even have one on your diesel!
"The CMP sensor is only used on start up to synchronise the ECM program with the CKP signal. This is to identify number one cylinder for correct injection timing."

Simon
__________________
"Whatever is rightly done, however humble, is noble."
Sir Henry Royce.

Last edited by SD1too; 22nd January 2020 at 09:19..
SD1too is online now   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 11:17.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright © 2006-2023, The Rover 75 & MG ZT Owners Club Ltd