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Author Topic: Paper Clip test won't work?  (Read 1014 times)

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Clouseau

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Paper Clip test won't work?
« on: 17 May 2011, 18:06:59 »
Hi folks. My 2.0 16v Ecotec omega has developed an annoying fault where it can suddenly lose revs, or (as of this morning) cut out completely whist driving along and taking several attempts to restart.

I have successfully used the paperclip test in the past to diagnose a faulty cam sensor but for some reason it won't work any more. I have tried various 'grades' of paperclip and followed the guide to the letter, but no flashing after the engine light goes out.  so...

Any idea what the fault may be?

Any idea why the PC test won't work?

The cam sensor was a genuine VX siemens - I'm wondering about a crank sensor on the way out (it is the original one and now on 120K).

Any suggestions greatly appreciated!

Clouseau
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RobG

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Re: Paper Clip test won't work?
« Reply #1 on: 17 May 2011, 18:11:40 »
Later 4-pots using 4 digit codes will only flash the light if codes are present
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Clouseau

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Re: Paper Clip test won't work?
« Reply #2 on: 17 May 2011, 18:19:16 »
Thanks Rob, that sounds encouraging.

Any ideas about what might be causing the problem then? All is not well, so I'm surprised (although reassured) that no fault codes are showing ...
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RobG

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Re: Paper Clip test won't work?
« Reply #3 on: 17 May 2011, 18:21:31 »
Could possibly be crank sensor as they don`t always throw a code
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TheBoy

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Re: Paper Clip test won't work?
« Reply #4 on: 17 May 2011, 21:20:38 »
Does it only cut out at idle or on overrun? If so, I'd clean icv and throttle body and breathers
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Clouseau

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Re: Paper Clip test won't work?
« Reply #5 on: 17 May 2011, 21:38:05 »
Usually while I'm driving down the motorway! Idle is more or less ok, although I do occasionally get a fluctuating idle when pulling up at junctions etc. I'll give the breathers a once over at the weekend and the usual ICV / throttle body 'service' too, just to rule this out...
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Re: Paper Clip test won't work?
« Reply #6 on: 20 May 2011, 22:42:02 »
3" split in the air inlet hose between the air flow sensor and the throttle body. D'oh!
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Andy B

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Re: Paper Clip test won't work?
« Reply #7 on: 20 May 2011, 22:44:39 »
Quote
3" split in the air inlet hose between the air flow sensor and the throttle body. D'oh!

No fault code for that ......  ;) ;)
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henryd

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Re: Paper Clip test won't work?
« Reply #8 on: 20 May 2011, 23:29:21 »
Quote
Quote
3" split in the air inlet hose between the air flow sensor and the throttle body. D'oh!

No fault code for that ......  ;) ;)

still a result though,found the a problem
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Andy B

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Re: Paper Clip test won't work?
« Reply #9 on: 20 May 2011, 23:35:20 »
Quote
Quote
Quote
3" split in the air inlet hose between the air flow sensor and the throttle body. D'oh!

No fault code for that ......  ;) ;)

still a result though,found the a problem

true!  :y :y :y
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