astra h 1.7cdti turns over but wont start

[westy_77]

hi guys,
driving along and car cut out,put a code reader on and it showed crank sensor,replaced it still wouldnt start(but does crank)have now tested all fuel pump,injection system,timing cambelt everything is fine.
But just sent ecu off they found 2 faults fixed it,sent it back put it in still the same!!!! i dont know what to do,why didnt the computer show an ecu fault??
weird i need some help!!
many thanks

[Liteace]

Scope the crank sensor, it maybe problem with bent or missing tooth\teeth on the crank.

[Meat-Head]

Scope the crank sensor, it maybe problem with bent or missing tooth\teeth on the crank.

Better than that Jim, suggest the 'teeth' on the crank shaft have 'fell off'

[Liteace]

Better than that Jim, suggest the 'teeth' on the crank shaft have 'fell off'

"teeeth" fall out, they dont fall off

[Meat-Head]

"teeeth" fall out, they dont fall off

is another way

Refusing to pay your invoive at M-H-M is also an option

Refering to 'this' totally wrong image, but will do for what is a rumor going around

[racin-snake]

the relluctor ring can become loose and move or teeth can break off seen it with a bent con rod situation
but for this one in paticuliar
what codes are you getting ?
and with what are you reading it with?
edu is a common failure on these as is derv ingress to the ecm
worth looking at the codes you get can you post them?

[westy_77]

the codes are p0335 crank shaft sensor malfunction,p0500 vehicle speed sensor malfunction abs/tc/esp.

whats your thoughts on them??

these were picked up on proper vauxhall tech 2,but if the ecu was faulty why didnt it pick that up?

thanks for your help

[racin-snake]

what i said was the edu suffers from problems .ie dry solder on relay for spill control
and ecu can suffer from diesel ingress
not malfunction
the best and easiest answer to your faults is find out what the sensors doing in real time
if it has a crank/cam sensor scope the both and look for tdc synchronisation
also not entrely sure what engine or variant it is but
if the edu goes down theere wil be no fuel suply to the injectors
but will flag a code
another thing is the reluctor is sometimes a matal strip round the crankshaft again i do not have a diag so shooting in the dark
but this can vibrate loose and caus the reluctor to move around and take tdc out of sync
also on tech2 you will have the option of guided diagnostics
use tat to graph the crank cam situ
again i am only trying to help

racin snake

[carsolution]

Hi friend.
To check if it is the cramshaft sensor you must do 1 of 2 things.
In Opel cars we can see it without diagnose machine.
first option - if you have diagnose machine put it in live data and see if it is reading rpm signal.
second option - In opel cars when the cramshaft is not reading the rpm pointer in the dashboard doesnt move, if it reads it moves even if it is just a little.
Test this way if no diagnose machine.
Best Regards,
Nuno

[westy_77]

cheers guys
when we put tech 2 on the crankshaft is reading giving a signal when turning over (200-300)which i persume means that it is picking it up although it showing as fault?

racing snake when u refer to edu/ecu i take it u mean the same thing?its located at the front in the wheel arch(stupid place to have ecu!!??)if you was seeing a reading would u rule out the reluctor ring?

what i did notice is when turning over there was little if none reading from the camshaft sensor when turning over which i have tryed a new camshaft sensor which does not make any difference but a solid reading from crankshaft.

bizzare its driving me mad but all your helps are brilliant cheers

[Ashraf6119]

Hi

Have you checked the Timing if its not jumped it could be one tooth out.


Ash

[racin-snake]

can you give us full details ie engine code and year ect
also unfortunately no the crank signal will still show if relluctor has moved it will just see tdc as a different position
is cam sensor in the pump on this one ?
full details would help a big bit
as we cannot see or hear the car
on other thing will it start with brake cleaner ?
also ive seen these to have oil pump wreck completely vauvhall have a modified oil pump
but if it were to seize then maybe it could have jumped a tooth on timing ?
all in theory but an option

[westy_77]

Ok i have checked the timing/cambelt etc and it is spot on.

have not tryed brake cleaner yet,what will this eliminate if it starts or does not?
the cam sensor is at the top level with the ca**** the front as u look at the engine...

When u say engine code what do u mean or where can i get that from?
Thanks for all your helps any ideas will certainly help!!

[racin-snake]

engine code should be in service book and on the engine too
the ecu is at th top of the engine the edu is at the back of the engine at o/s drive shaft or there about's
if you can give year ect it will help us to help you
and brake cleaner will start this car if sprayed down the inlet manifold
but only briefly as long term may cause damage
post full details
remember we cannot help with no info
as we cannot see the car and diagnostics is one thing but doing it remotely is another
post full details no need for vin or reg
just engine year ect

[teuton]

If really

fuel pump,injection system,timing cambelt everything is fine.

, then just go back to the basics; check compression, do a cylinder leak down test etc. BTW you didn' t put fuel in shortly before it stopped working?
As recommended by racing snake please come up with engine details.