Is this a typicult CAS(crank angle sensor) fault

[zac_sa]

I have the code 47 on my VS. Its been displaying the fault for a couple weeks now.
Ive orderd a new CAS and hopefully should get here in a day or so.

Ive had the car stall once or twice before but this is what happened 2day.

The car stalled quite a few times, id wait a minute and would start fine. At 1 stage it wouldnt start so I poured some bottled water over the harmonic balancer.
The engine started then there was like a squeeling noise that was on and off but constant, ie 1-2 quick squeels a second.
I wondered if the metal contracted a little causing the CAS to slightly rub the harmonic balancer?

Anyway the car then back fired, loud bang and cloud of black smoke.
Drove another k, then back fired 2 times in a row another black cloud and engine stalled.
I waited for 10 mins then the car started fine and I could drive another 20 mins to get me home and no further issues.

Is this a typicult CAS issue, the back firing threw me. I wonder if the CAS is just telling the injectors to fire at the wrong time causing a fuel build up???

[Not_An_Abba_Fan]

Sounds like CAS. The backfiring would be the missing signal causing no firing at all. The unburnt fuel builds up, then bang, a back fire.

The squeal would just be the fact that the belt was wet.

[zac_sa]

Cheers thanks heaps.
Hopefully the new CAS gets here soon and I can change it over.

[Brett_jjj]

When replacing sensors,try to only use genuine holden sensors.Ive seen a few cheaper brand sensors cause problems or not last very long,especially the cheaper CAS's available from ebay etc.Ive been caught out before with a new faulty CAS and have run into a few others that had recently been replaced and had failed again withing a few months.I just paid $120 for a new genuine CAS for my VS from the local holden dealer.They are more expensive,but at least they last a few years and are reliable.I could have got one for $50 probably,but its not worth it if it causes me to break down or if I have to buy another new one in 12 months time if it doesnt last.

[zac_sa]

What I dont get is if its just a sensor with magnets on it. I dont understand why they seem to be such a common faulty device.
What is it that causes them to fail.

[Hangman]

Heat would be my guess (but don't quote me).

I've had to replace them in every Commodore I've had, but for some reason I've never had to do it twice on the same car...

Also, I don't think I've ever bought a new one either, they've all been 2nd hand from a wreckers...

[justbad4you]

i brought a non gen cas( lasted 3weeks) got a gmh cas 2years ago and still hummming along

When replacing sensors,try to only use genuine holden sensors.Ive seen a few cheaper brand sensors cause problems or not last very long,especially the cheaper CAS's available from ebay etc.Ive been caught out before with a new faulty CAS and have run into a few others that had recently been replaced and had failed again withing a few months.I just paid $120 for a new genuine CAS for my VS from the local holden dealer.They are more expensive,but at least they last a few years and are reliable.I could have got one for $50 probably,but its not worth it if it causes me to break down or if I have to buy another new one in 12 months time if it doesnt last.