CAS ?

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CAS ?

Postby Jon_B » Tue 02.12.2003, 10:50

My S2 died last night, luckily outside my house.  After a fair run of about 20 miles, during which the engine light flashed on briefly a couple of times causing loss of all power, the engine finally ground to a halt.  It will now not re-start.  It seems to me to be the classic symptoms of CAS/Hall Effect sensor failure.  However, there are no error codes stored.  Anyone got any ideas?
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Re: CAS ?

Postby Jeff » Tue 02.12.2003, 11:09

Jon,<br><br>Make sure your earth lead to your battery is secure.  I had a dodgy connection, and it exibited the exact same symptoms that you are encountering (check engine light but no error 41 or any errors from paper clip test).  After checking the ground cable, and clamping down on lead to the battery, I haven't encountered the problem again.  
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Re: CAS ?

Postby Jon_B » Tue 02.12.2003, 11:14

Jeff,<br>I will check the battery connection this evening.  However, the engine does turn over but will not fire!
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Re: CAS ?

Postby ESM » Tue 02.12.2003, 13:19

Doesn't sound like a typical CAS problem to me. The CAS code (and others) generally get set when the problem becomes moderate never mind severe. Since the check engine light has been on then a code should definitely have been stored (the light gets put on when the ECU has recognised a problem - hence if your CAS was dead then the code should be there). If you have intermittent power to the ECU (bad earth?) you might get the symptoms described and no stored code.<br><br>I assume you did you get code 12 flashed when you checked the codes?  <br><br>Alan
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Re: CAS ?

Postby Gattree » Tue 02.12.2003, 13:20

You could also check the Fuel Cut off switch located to the Right of the Battery (looking from the front) it usually pops up after an accident but it's worth a look<br><br>Hope it's not serious<br><br>Gary
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Re: CAS ?

Postby Jon_B » Tue 02.12.2003, 13:41

I'm a bit worried now, as I thought it might be a "simple" CAS problem.  If a CAS problem is always stored by the ECU, then I have no idea what it is.  Alan, yes, code 12 was flashing.  Gary, I didn't check the fuel cut-off switch.  I don't think it's that as you can smell fuel and the exhaust was popping when hot.
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Re: CAS ?

Postby Sy V » Tue 02.12.2003, 13:49

Jon<br><br>I just want to go over what happened again.<br>You were driving and you saw the engine light come on and simultaneously to this you lost "all power"...Do you mean all.  Did the engine cut out or were you left with reduced oomph?<br>You obviously made it home...Did you get home with engine light on and under reduced (get you home) power, or had the light gone out and all seemed OK?<br>The car turns over now but won't fire up and you can smell fuel, check?
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Re: CAS ?

Postby Jon_B » Tue 02.12.2003, 16:28

Sy,<br>Light was only on momentarily when the engine cut out completely.  Light was off for remainder of journey but, on second thoughts, only seemed to come on on higher speeds, or heavier acceleration (note:not heavy boost).  I would say it was an ignition fault as you can smell fuel when trying to start with prolonged starter activity (flooding).  As I say, now it will turn over but will not fire.<br><br>Cheers<br>Jon
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Re: CAS ?

Postby Mike Y » Tue 02.12.2003, 18:41

???Have you had a look at your coil pack for cracks etc.<br>When the engine turns over check for arcing out of the pack. I would also check all leads to the coil pack and its seperate earth lead to its base plate.<br><br>When I had coil pack problems it left no codes on the ECU.<br><br>Good Luck
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Re: CAS ?

Postby Jon_B » Wed 03.12.2003, 10:10

I'll have a good look at the weekend when it's light!  I'll post my findings then.<br>Jon
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Re: CAS ?

Postby mallymoo » Mon 15.12.2003, 10:16

Hi Jon,<br><br>Sounds similar to a problem i had a while back which turned out to be a bad earth to the engine. After having a new earth cable fitted its been fine.  The engine will lose power at 4000rpm if an engine fault is detected.<br><br>Good luck [smiley=banana_tekno.gif]
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Re: CAS ?

Postby Jon_B » Mon 15.12.2003, 11:20

I thought I would update you all on the current status.<br>Engine now starts but doesn't run as sweetly as it did before.  I replaced the coil pack, as I've had a spare one (brand new) for years from my previous SE.  Engine now lacks power over 4000 rpm and will not boost without what feels like a rev limiter cutting in.  Engine light does not come on! ???
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Re: CAS ?

Postby stevo » Mon 15.12.2003, 11:56

how old are the plugs and leads?
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Re: CAS ?

Postby Jon_B » Mon 15.12.2003, 12:04

Plugs are brand new Denso Iridium.  Leads are original.
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Re: CAS ?

Postby stevo » Mon 15.12.2003, 12:29

a couple of months ago i had the same fault. running like a burst @r$e. plugs and leads sorted it out no probs. remember your leads have been handleing millions of of pulses of high voltage for the best part of a decade.
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Re: CAS ?

Postby M100 TWO » Mon 15.12.2003, 12:59

Hi Jon, when you changed the coil pack did you put the leads back in the right place because the system will pulse on compression and exhaust and if your leads are original I would recommend buying magnecor the part number is: 40152 and halfords price £56.25 unless anyone else knows different :)
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Re: CAS ?

Postby Jon_B » Mon 15.12.2003, 13:12

Plugs are in the right place.  I was sure to label them even though the original markings were still on the leads.  Just seems strange that car won't run over 4000rpm.
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Re: CAS ?

Postby stevo » Mon 15.12.2003, 14:46

enter elan scan man stage left. [smiley=tomcat.gif]<br>cape and pants over trousers optional. [smiley=tekno.gif]
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Re: CAS ?

Postby Candles » Mon 15.12.2003, 15:00

As someone on the last page mentioned, the 4000rpm thing is the ECU's "Oh bugger, something isn't right...... This'll get you home." Mode.<br><br>Have you read through the manual, in particular the sections that detail the diagnostics (without Tech 1 tool) for each sensor?<br><br>Normally it is with the 'check engine' light, but does the bulb work??  Maybe it is a weird one that doesn't illuminate it.  As Stevo (who is now broke) suggests above; what you need is ElanScan to look at all the sensor outputs.<br><br>I suppose you haven't got Elanscan though, so I'm not much help am I!  You could just throw money at the leads as they probably need doing anyway, then see what you have afterwards!<br><br>In your boots (or Elan driving shoes) I'd probably 1) Verify the 'check engine' light is working. If it is; 2) Buy new leads. No effect; 3) Drive to see a fellow Elaner with Elanscan and run the check. 4) Keep fingers crossed at all times etc etc.<br><br>Candles.
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