ChrisW
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| posted on 13/7/09 at 10:12 AM |
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Guess the fault
On my Mrs motor, a 57 plate Astra twin top 1.6 petrol. It died a sudden death on the M1 on Saturday.
Symptoms are:
- Spanner light on
- Won't rev over 1500 rpm
- Sounds like nails in a tumble drier (yes, even worse than normal!)
- Brake pedal rock hard, no vacuum on the servo pipe
- No hissing sounds, unlikely a manifold air leak
- Servo vacuum pipe isn't convoluted, just a fire arrester thing between servo and inlet manifold
It's under warranty, so we just shipped it straight back to Vauxhall, but I'm completely stumped as to what the problem could be.
Anyone got any guesses?
Chris
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l0rd
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| posted on 13/7/09 at 10:19 AM |
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Engine F****D up?
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adithorp
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| posted on 13/7/09 at 10:21 AM |
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Cam tensioner failed and chain jumped a tooth?
adrian
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
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Mr Whippy
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| posted on 13/7/09 at 10:28 AM |
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my guess is the cars gone into limp home mode and probably not generating enough vacuum for the servo. Was it miss firing?
probably a sensor went capoot, if it still run it can't be catastrophic, the engines just trying to protect itself
Fame is when your old car is plastered all over the internet
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stevec
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| posted on 13/7/09 at 11:09 AM |
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Could it be a really big manifold air leak. too big to hiss?
Steve.
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Steve G
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| posted on 13/7/09 at 11:13 AM |
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I'm copying Mr Whippy and saying some sort of sensor fault resulting in it going into limp home mode.
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Mr Whippy
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| posted on 13/7/09 at 11:21 AM |
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remember all this fun?
Fame is when your old car is plastered all over the internet
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Minicooper
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| posted on 13/7/09 at 11:28 AM |
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Crankshaft sensor
Cheers
David
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Gav
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| posted on 13/7/09 at 11:47 AM |
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Yep crankshaft sensor, mine went on an old vectra, very similar problems.
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Omni
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| posted on 13/7/09 at 11:52 AM |
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Crankshaft sensor for me too 
O
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Mr Whippy
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| posted on 13/7/09 at 12:18 PM |
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sounds like they could have done with fitting two
Fame is when your old car is plastered all over the internet
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02GF74
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| posted on 13/7/09 at 12:41 PM |
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if crank shaft sensor goes then ecu would not know when to fire the ignition - maybe that accounts for the bag of nails noise?
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Nash
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| posted on 13/7/09 at 12:43 PM |
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Limp home mode. Banging and clatering is the unburnt fuel in the cc above 25mph it does that. Condensor on one or more plugs failed.
Or it could be something else 
let use know when you find out. Is there a prize for the right answer? 
.......... Neil
It's What You Do Next That Counts.
Build It, Buy It, Drive It:
Southern Kit Car Club
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BenB
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| posted on 13/7/09 at 12:58 PM |
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It'll be a sensor failing leading to limp home. Could be pretty much anything but crankshaft sensor could be a good option.
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ChrisW
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| posted on 13/7/09 at 04:13 PM |
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Well the Mrs rung up and was told 'it's a valve in the engine', which doesn't really cut it down. I'll make sure I go
with her when she collects it and find out the real problem!
It's going to take them a few days to fix it, whatever it is. She's getting a courtesy car though so she's happy.
Chris
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ChrisW
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| posted on 13/7/09 at 04:16 PM |
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quote:
Originally posted by stevec
Could it be a really big manifold air leak. too big to hiss?
No, it's got plenty of suck on the air filter pipe. It's not the pedal either, as it tries to rev up when you floor it, but stops at 1500
rpm. (It's a 'drive by wire' throttle by the way).
Chris
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