Petrol Diagnostics

Back to Forum

Post a Response

Vauxhall Calibra 2.5 V6 1997 - Intermittent non start, no crank signal - Fixed #

Posted by Daniel Hogg on January 11, 2009, 8:56 pm

( Optional ) Scanner Used: crypton pro scan and haynes pfcr

Hi all hope everyone is having a good start to the new year, i was until i got this calibra in.
AA pulled it in not running , so scanned it came up with no crank signal, checked crank sensor OK. It has no pulse to injectors and no spark.
It had a after market alarm and immobilizer on meta , i think , so bypassed that 2 circuits fuel and starter. I went to start it and still no joy so i powered up the fuel pump manually and it started took off feed and ran no probs for about 2 days then all of a sudden non start again , The ecu is recognizing the key. I wondered if this could be an immobilizer to ecu fault i.e. wiring loose conection etc. Am just posting to see if any of you lads have come across this before , before i start and check the wiring out.
Thanks in advance Daniel Hogg

Re: Calibra v6 intermitant non start

Posted by Tony Ludford User icon on January 11, 2009, 10:42 pm, in reply to "Calibra v6 intermitant non start"
Tony Ludford

How old? Has it got the old motronic relay? As that's the first thing I'd be assessing, if not the purple ones can be as bad!

Re: Calibra v6 intermitant non start

Posted by daniel hogg User icon on January 12, 2009, 12:17 am, in reply to "Re: Calibra v6 intermitant non start"

Sorry its a 1997 model,
i dont know which relay to check as data for this model is limited on autodata. There are relays behind the fuse box in right hand kick panel 3 green , 1 blue , 1 grey. dont know which one to check.

Re: Calibra v6 intermitant non start

Posted by Tony Ludford User icon on January 12, 2009, 11:41 pm, in reply to "Re: Calibra v6 intermitant non start"
Tony Ludford

Looks a little something like this:

Re: Calibra v6 intermitant non start

Posted by Mark Carter User icon on January 13, 2009, 8:42 am, in reply to "Re: Calibra v6 intermitant non start"
Mark Carter

The early ones used to be grey, and the later ones were black.

Regards Mark.

Modern cars, Its all wizardry and witchcraft

Re: Calibra v6 intermitant non start

Posted by DANIEL HOGG User icon on January 15, 2009, 12:48 pm, in reply to "Re: Calibra v6 intermitant non start"

Hi there thanks for the replies , i changed the relay and still no spark or fuel , looks as though i will have to check wiring at ecu.
thank alot fellas

Daniel hogg

p.s.
just a thought if he crank sensor is faulty would that make the fuel pump live go down , i check resistance and it fluctuates when cranking , is there any better methods for testing crank sensors?

Re: Calibra v6 intermitant non start

Posted by Glyn Morgan User icon on January 15, 2009, 1:44 pm, in reply to "Re: Calibra v6 intermitant non start"
Glyn Morgan

Hi Daniel,

Are you relying on a resistance test only, when checking the crankshaft sensor?

Can you see engine speed in serial data under cranking?

Do you have a scope?

Glyn

Re: Calibra v6 intermitant non start

Posted by Tony Ludford User icon on January 15, 2009, 3:25 pm, in reply to "Re: Calibra v6 intermitant non start"
Tony Ludford

Yes if the CPS goes down, it doesn't trigger ECU to run the relay. Page4 http://calibra-classic.org/docs/Opel_Motronic2.5.pdf

Re: Calibra v6 intermitant non start

Posted by DANIEL HOGG User icon on January 15, 2009, 4:01 pm, in reply to "Re: Calibra v6 intermitant non start"
Daniel Hogg

Hi Glyn i am doing a resistance check as i don't own a scope,(think i best invest in one soon) when reading live data there is no rpm signal . i ordered crank sensor today , dealer only £60 + the dreaded 2 days looks like its getting left till monday.thank you all you lads who replied i will keep updated when i get sensor.

thanks again
Daniel

Fixed #

Posted by Daniel Hogg on January 19, 2009, 6:11 pm, in reply to "Re: Calibra v6 intermitant non start"
Message modified by board administrator January 20, 2009, 8:04 am

Hi all just to let you know , crankshaft sensor arrived , fitted it to car and it started no probs thanks for all your help.

Daniel Hogg

[ Petrol Diagnostics ]

Copyright © uk autotalk