FYI really, could help someone with a bizarre C.A.S. problem:

 

[14:30] - Finished lunch break - better get back to work

[14:41] - 11 minute blast back to work along dual carriage way

[14:41] - Pass shown to gatehouse security - go to pull away and...

brrrRRRRRRRRRMMMMM ... tshhhhhhhhhhh - And I've got about 10 metres!! Hmmm - All of a sudden, the accelerator has become more of a volume control than a go-go pedal. So hobble around the corner at about 5mph but the car sounds likes its doing 50mph!

 

Anyway, park the car cos I'm late back anyway, and decide to sort it out later....

 

[19:45] - Finish work. So out in the carpark, pop the bonnet and have a look - all appears fine. Start it up all appears fine. Drive around the carpark - fine. So a little perplexed, decide it'll be ok to drice home.

 

Get almost all the way home and it starts doing it again! So this time decide to put my foot down further to see if it gets worse. Things got a lot louder - car sounded like the exhaust had been removed until the revs got about about 3000rpm, and car goes lurches like someone lit some hidden touch-paper to a rocket strapped under the car! Noise returns to normal and the seems ok, until the revs get back below 3000 again. (Even more perplexed now)

 

[20:05] home. Pop the bonnet - still can't see anything odd, no boost pipes come loose, turbo actuators are operating fine - Hmm.

So I start wiggling electrical connectors, as soon as i touch the already-firmly-fitted CAS sensor, the car drops dead. Cars starts again fine though. Doh...

 

So looks like dodgy connector on the CAS, the connector is clean as whistle, no loose or corroded cables.

 

Anyone experienced this before? Sounds almost similar to the PTR problem, in that once its hot a dodgy connection materialises.

 

So going to remove it before work tomorrow and see whats up, perhaps I just need a new one!

Anyone else seen this before?

I've had excatly the same problem with the CAS - I havent experienced your misfiring or odd running - but I have had the 'just touched it and the car dropped dead' I cleaned it all up - noticed yours is already clean - and check that all the contacts where not too flat to make a good contact and fitted it firmly back - it stopped it cutting out if you touched it though.

 

You may have a PTU problem - well known to work OK when cold but once warm cause all sorts of problems......Check that connector out as well - but it may be worth swapping it for a good one to see if it does the trick

Stuart - might be way off, but could the noise be the centrifugal clutch on the rad cooling fan deciding to lock. Stu (yellow tt Martlesham Labs) had a similar problem that sounds like your description. He had to drive real slow as the fan was spinning far too fast and shaking the car to bits.

 

...don't know about the CAS...

 

good luck

 

Jack

Simon - who's Stuart?

 

...sorry - Jack

Have you tried running the onboard analysis?

Didn't have time to look this morning at the CAS, but hopefully tomorrow - got out of bed really late this morning so just drove straight to work....and didn't do it, so perhaps my fiddling last night has temporarally stopped it.

 

Jack:-

Stuart?? LOL :)

The fan I believe to be fine - since its not that old actually. Besides that wouldn't create such an immense power drop (like nother there), and the exhaust note - well... sounded like a high compression motorbike with a racing exhaust!

 

Simmo:-

ECU reads 55 - :-S Which isn't very helpfull really!! (I was really hoping for a code 11)

 

Bilky:-

I'm surprised my PTU is still alive to be honest! Especially after hearing about so made failing. Perhaps I'll take it apart and check all the solder joints - since its these that fail I believe. Perhaps the CAS suffers from the same problem too??

 

Cheers peeps