non starting - Page 3

JJ75 · 25th April 2014, 11:16

Whilst on idle,my readings from the yellow wire fluctuate from around 9v to around 14v,should the reading be constant? also my yellow wire is in the middle of three,not on the left(as in pic),does it matter?
Also fluctuates when the ignition is on and car not running

Cheers
Jay

Number 6 · 25th April 2014, 17:21

Contact Frenchmike he will be able to tell you

FrenchMike · 1st May 2014, 18:00

Quote:

Originally Posted by JJ75

Whilst on idle,my readings from the yellow wire fluctuate from around 9v to around 14v,should the reading be constant? also my yellow wire is in the middle of three,not on the left(as in pic),does it matter?
Also fluctuates when the ignition is on and car not running

Cheers
Jay

Hi Jay,

Ideally a oscilloscope would be usefull as the signal looks like this:

Camsens1.jpg

But as said in my how to ,you may detect an "average " 9 volts voltage.

When cranking,the battery voltage is rather 10 volts than 14

to me the earth is the Brown one and the signal yellow the middle one.

It is possible to take the measurement engine started ;
In that i guess, you'll get around 10/11 volts .

Generally the fault appears while hot.

Could be a injector issue ?

Good luck

Mike

JJ75 · 1st May 2014, 18:40

Thanks Mike,can't understand why the voltage is fluctuating even without the engine running? Faulty sensor?
Injectors seem fine- http://www.the75andztclub.co.uk/foru...d.php?t=182076

FrenchMike · 1st May 2014, 19:02

Quote:

Originally Posted by JJ75

Thanks Mike,can't understand why the voltage is fluctuating even without the engine running? Faulty sensor?
Injectors seem fine- http://www.the75andztclub.co.uk/foru...d.php?t=182076

Check your connexions

is the supply voltage (red/white) stable ?

JJ75 · 1st May 2014, 19:08

Will test tomorrow. Thanks for the advice,i really appreciate it.

JJ75 · 2nd May 2014, 20:23

Readings on cam sensor are fine today,cant have had the earth probed properly?

Definitely looking at injectors now..........

25th April 2014, 11:16	#21
JJ75 Loves to post Rover 75 CDTI Connoisseur SE Join Date: Apr 2014 Location: Sheffield Posts: 464 Thanks: 44 Thanked 104 Times in 72 Posts	Whilst on idle,my readings from the yellow wire fluctuate from around 9v to around 14v,should the reading be constant? also my yellow wire is in the middle of three,not on the left(as in pic),does it matter? Also fluctuates when the ignition is on and car not running Cheers Jay __________________ [SIGPIC][/SIGPIC] Statistically, 132% of people tend to exaggerate! ~~~~~~~~~~~~~~~~~~ If you have a lisp, don't expect to be taken seriously when you tell people you are an assassin.

25th April 2014, 17:21	#22
Number 6 This is my second home Rover 75 tourer Club CD/Limo Tints Join Date: Nov 2008 Location: Meneac Posts: 6,759 Thanks: 5,007 Thanked 1,609 Times in 869 Posts	Contact Frenchmike he will be able to tell you __________________ ] "I started out with nothing, and Ive still got most of it left!"

1st May 2014, 18:40	#24
JJ75 Loves to post Rover 75 CDTI Connoisseur SE Join Date: Apr 2014 Location: Sheffield Posts: 464 Thanks: 44 Thanked 104 Times in 72 Posts	Thanks Mike,can't understand why the voltage is fluctuating even without the engine running? Faulty sensor? Injectors seem fine- http://www.the75andztclub.co.uk/foru...d.php?t=182076 __________________ [SIGPIC][/SIGPIC] Statistically, 132% of people tend to exaggerate! ~~~~~~~~~~~~~~~~~~ If you have a lisp, don't expect to be taken seriously when you tell people you are an assassin.

1st May 2014, 19:08	#26
JJ75 Loves to post Rover 75 CDTI Connoisseur SE Join Date: Apr 2014 Location: Sheffield Posts: 464 Thanks: 44 Thanked 104 Times in 72 Posts	Will test tomorrow. Thanks for the advice,i really appreciate it. __________________ [SIGPIC][/SIGPIC] Statistically, 132% of people tend to exaggerate! ~~~~~~~~~~~~~~~~~~ If you have a lisp, don't expect to be taken seriously when you tell people you are an assassin.

2nd May 2014, 20:23	#27
JJ75 Loves to post Rover 75 CDTI Connoisseur SE Join Date: Apr 2014 Location: Sheffield Posts: 464 Thanks: 44 Thanked 104 Times in 72 Posts	Readings on cam sensor are fine today,cant have had the earth probed properly? Definitely looking at injectors now.......... __________________ [SIGPIC][/SIGPIC] Statistically, 132% of people tend to exaggerate! ~~~~~~~~~~~~~~~~~~ If you have a lisp, don't expect to be taken seriously when you tell people you are an assassin.