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[ianu]

Hi all,
Any help appreciated. Obviously last time car was used all appeared OK. Been parked for a day or so. This morning - engine spins but will not fire.
The only code present is the Cat code (0430) - I'm assuming that that wil not prevent it starting as I've had it a while anyway.

If there is a crank sensor problem, would you always expect the code to be present ? This is a fairly new sensor as well (GM part).
It's not battery as far as I can tell - it turns over at the same rate with or without a jump pack connected.
The crankshaft is turning along with everything else on that visible belt - my worry is that it seems to be turning rather 'easily' - almost as if there is no compression.
Is there a quick inspection I can do to check the cambelt is where I left it when I parked it up last time I used it ? or would it be pretty apparent if it'd gone walkies ??
Is there anything else that would give these symptoms ?

Cheers
Ian.

[ianu]

OK - quick update 

Car finally started - but very reluctantly after a lengthy cranking with a booster pack connected to keep the battery company.
Initially misfiring - then settled down OK. Took it for a quick run and all seems OK. But I now have 0300 code - indicating a random multiple misfire. I'm sure it was 0340 when I first read it ?
Will this clear if it disappears as it seems to be Ok now. Should I be checking coil packs again ?

Cheers
Ian.

[Mv8.com]

Fuel related? Fuel filter serviced?

Sounds crank sensor related otherwise. Often no code stored.

Difficult one

[dbug]

Yep agreed most likely dodgy crank sensor

[Kevin Wood]

Any chance it could have flooded? Has it been started for a few seconds just to shift it around the driveway? I find they can get upset after a couple of quick runs due to the rich mixture.

Failing that, crank sensor, I'd say. They don't always generate a code IME.

[henryd]

Any chance it could have flooded? Has it been started for a few seconds just to shift it around the driveway? I find they can get upset after a couple of quick runs due to the rich mixture.

Failing that, crank sensor, I'd say. They don't always generate a code IME.

I agree,seen that many times where someone has started and moved vehicle a few feet and then found next time out it won't go,OP also mentioned feeling that there was a lack of compression which ties in with that

[ianu]

Thanks all,

Yes I'm suspicious of the c/s even though it's less than 6 months old ?? Still no code other than 'random misfire detected' - but to make matters worse it seems to be OK now.    so I have a possible intermittent fault.
I know what you mean about possibly flooding it - it wasn't me but SWMBO that originally tried to start it - so I don't have the exact millisecond by millisecond account of what precisely happened as the key was turned for the first time   
I've had that happen to me when it hasn't caught as expected and I've released the key before it fired, only to have to coax it a couple of times to get it to come out to play again 

SO nothing conclusive yet - but it seems to have decied to play ball for now 

Cheers
Ian.

[Andy B]

Any chance it could have flooded? Has it been started for a few seconds just to shift it around the driveway? I find they can get upset after a couple of quick runs due to the rich mixture.

Failing that, crank sensor, I'd say. They don't always generate a code IME.

I agree,seen that many times where someone has started and moved vehicle a few feet and then found next time out it won't go,OP also mentioned feeling that there was a lack of compression which ties in with that

Agreed & apparently a very common call out at Christmas when a car gets moved to let Auntie's car of the drive & left again for a few days.