Martin_C
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Registered: 27th Jun 03
Location: Ayrshire, Scotland
User status: Offline
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mates xe nova was running fine the other day til he went to drive home from work, engine is turning over but no spark or fuel (low voltage to fuel pump).
had a few suggestions of ht leads, crank sensor etc.
so tried the crank sensor...
was told that if the sensor itself has stopped workin the car would run in a safe mode, only revving to 3000rpm, but its just totally dead.
muppetsport said that if its just totally goosed the car wont get spark or fuel at all...
as you can see, it looked pretty shagged 
it was covered in black tape, cos the casing was broken i assume, and the black wire is still attached but the yellow is totally rotten and broken off.
as this looks totally scrap, i assume thats why the engine wont fire? just want to make sure as a new one from vauxhall is £88 + vat 
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Sly_SRi
Premium Member
Registered: 9th Apr 04
Location: Reading, UK Drives: Corsa C
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Muppetsport is right, If the crank sensor has gone the engine won't start at all. Controls fuel and ignition.
You can get them cheaper from autovaux. I recently purchased one...although i'm not totally sure I need it...
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Martin_C
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Registered: 27th Jun 03
Location: Ayrshire, Scotland
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if you dont give me a shout mate, theres a guy on ebay sells new ones for about £40 delivered, gonna phone him tomorrow after trying a mates one to see if its defo that that is the problem 
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myke
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Registered: 7th Feb 01
Location: High Wycombe, Buckinghamshire
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i would suspect fuel pump relay before replacing the crank sensor unless it's literally screwed.
that has effect on spark and fuel and is a whole sight cheaper than the crank sensor.
also, i wouldn't have thought crank sensor would effect fueling really?
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Martin_C
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Registered: 27th Jun 03
Location: Ayrshire, Scotland
User status: Offline
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well the shielding around the wires is pumped, the yellow wire has fallen off, i'd say its screwed
wheres the fuel pump relay on an xe/nova?
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Sly_SRi
Premium Member
Registered: 9th Apr 04
Location: Reading, UK Drives: Corsa C
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fuel pump relay on my xe is on the end of the loom, just follow the wiring loom to the very end and they'll be the relay. near where it goes onto the coilpack.
You may be right myke, i'm not 100% sure on whether it effects fueling. Injectors might run from cam position sensor.
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Martin_C
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Registered: 27th Jun 03
Location: Ayrshire, Scotland
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i shall try both tomorrow lads.
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Sly_SRi
Premium Member
Registered: 9th Apr 04
Location: Reading, UK Drives: Corsa C
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judging by the pics i'd definately have that changed anyway, only gonna cause trouble in the future...if it isn't already!
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myke
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Registered: 7th Feb 01
Location: High Wycombe, Buckinghamshire
User status: Offline
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quote:
Originally posted by Martin_C
well the shielding around the wires is pumped, the yellow wire has fallen off, i'd say its screwed
wheres the fuel pump relay on an xe/nova?
just thought it might be worth trying fpr first as its about a tenth of the price of the crank sensor.
borrow someone elses if you have a friend with the same engine.
mine is about 2.5' from the grommet where the loom comes through the bulkhead on the bay side. i put mine under the scuttle, but couldn't say where yours might be. it's the only relay on that side of the loo though so should be easy to find.
[edit because just realised fuel pump relay and fuel pressure regulator have the same accronyms. i meant pump relay]
[Edited on 30-11-2005 by myke]
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deanmcreynolds26
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Registered: 15th Sep 03
Location: E46 //M3
User status: Offline
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u can use the crank sensor from most big block vaux's martin! 1.8 8v, 2.0 8v etc, u get the idea 
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Stu
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Registered: 3rd May 00
Location: Madchester UK Drives: 2014 BMW M135i
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I had the same problem on my old xe. Car just decided to cut out one day and then wouldnt start. Crank sensor was the problem.
Apparently theres a magnet in there which senses the crank turning - This then send a signal to the ECU to tell it to fire everything else.
Id say they are pretty twitchy to be honest and that one in the pic is well fooked!
Stu 
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Martin_C
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Registered: 27th Jun 03
Location: Ayrshire, Scotland
User status: Offline
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tried a new crank sensor, no joy, tried a diff fuel pump relay, no joy, and another, no joy
really running out of ideas guys.
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ed
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Registered: 10th Sep 03
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They are £45 from Autovaux
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ed
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Registered: 10th Sep 03
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You'll have a bit of trouble using one from an 8v too, they are a right bigger to get off because of the way the wire is routed 
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Martin_C
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Registered: 27th Jun 03
Location: Ayrshire, Scotland
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i've got a loan of a good working one just now mate, found autovaux already
someone suggested the shielding on the crank sensor could have caused problems as it was badly frayed and damaged the ecu, possibly that?
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Sly_SRi
Premium Member
Registered: 9th Apr 04
Location: Reading, UK Drives: Corsa C
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Seems unlikely, but its possible. Easiest to find somone with a c20xe and swap parts until it works! but this may not be feasible.
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Martin_C
Member
Registered: 27th Jun 03
Location: Ayrshire, Scotland
User status: Offline
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thats what i've been doing, dont really want to try an ecu in case it fries, might try the ecu we have in another car, if it dont work, then thats the fault!
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deanmcreynolds26
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Registered: 15th Sep 03
Location: E46 //M3
User status: Offline
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its an XE world full of problems
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Martin_C
Member
Registered: 27th Jun 03
Location: Ayrshire, Scotland
User status: Offline
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tried the ecu in an xe cavvy, but the part numbers are different, so the car didnt fire, i'm assuming that was the prob, so cant rule the ecu out yet!
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