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john 33_16v
16 Valve
Joined: 27 May 2005
Posts: 1406
Location: herts, uk
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 Posted: Mon Sep 19, 2011 2:46 pm Post subject: cutting out / constant idle valve |
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Hi,
Anyone had any experience of 16v cutting out, and/or the constant idle valve.
Car has started occasionally cutting out when idling, say at a long red traffic light  .
Car starts, runs and idles(about 900 rpm) fine. No signs of anything loose on the coil connections or any obvious air leaks etc.
With the constant idle valve disconnected the idle is raised to about 1100 rpm and the car doesn't cut out.
I have a spare valve which i can try out when i get 10 mins, but anyone got any ideas??
John
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93 33 16v Mirtle Met
08 Fiat Grande Punto Exotica Red
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BigAl
P4
Joined: 06 May 2003
Posts: 2990
Location: U.K Surrey
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| Posted: Tue Sep 20, 2011 3:48 am Post subject: |
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Hi John,
Try taking the connector to the AFM off, clean the contacts and replace, or just take it off and put it back on a few times.
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john 33_16v
16 Valve
Joined: 27 May 2005
Posts: 1406
Location: herts, uk
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| Posted: Sun Sep 25, 2011 7:22 pm Post subject: |
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| BigAl wrote: |
Hi John,
Try taking the connector to the AFM off, clean the contacts and replace, or just take it off and put it back on a few times. |
Thanks Al'. Tried that today and it didn't cutout on a shortish run at least, so hopefully that's sorted it.
John
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93 33 16v Mirtle Met
08 Fiat Grande Punto Exotica Red
90 Yamaha FZR600 Genesis- Silky white/red/blue |
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BigAl
P4
Joined: 06 May 2003
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Location: U.K Surrey
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john 33_16v
16 Valve
Joined: 27 May 2005
Posts: 1406
Location: herts, uk
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| Posted: Wed Oct 12, 2011 12:53 pm Post subject: |
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Car back to it's old tricks. It actually cut out at least 6 times during the MOT which was starting to piss off the tester somewhat.
Anyone changed the idle valve to cure this? I've got a spare one, but not sure it'll make any difference?
Any other things to try?
John
_________________
If it aint broke, fiddle with it until it is!
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93 33 16v Mirtle Met
08 Fiat Grande Punto Exotica Red
90 Yamaha FZR600 Genesis- Silky white/red/blue |
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BigAl
P4
Joined: 06 May 2003
Posts: 2990
Location: U.K Surrey
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| Posted: Wed Oct 12, 2011 1:48 pm Post subject: |
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Hi John,
sorry to hear that, try the spare one first, do you have another AFM, could be the tracts inside yours are worn or dirty.
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x2 33 16v
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lee16v
16 Valve
Joined: 29 Jun 2005
Posts: 1429
Location: Devon, UK
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| Posted: Wed Oct 12, 2011 4:28 pm Post subject: |
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John,
As you've got a spare I would try that. Failing that I have cleaned the inside of my valve with WD40 before which seems to help with the idling. The flap on the inside of the valve was shitted up on mine causing it to shut slower I guess. Parrafin would be ok to use aswell. |
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lee16v
16 Valve
Joined: 29 Jun 2005
Posts: 1429
Location: Devon, UK
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| Posted: Wed Oct 12, 2011 4:32 pm Post subject: |
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| Just thought of something else. Check the rubber seal on the valve....the big one valve to plenum. I wrapped PTFE tape on mine to give it a good seal. |
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john 33_16v
16 Valve
Joined: 27 May 2005
Posts: 1406
Location: herts, uk
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| Posted: Thu Oct 20, 2011 4:08 pm Post subject: |
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Tried spare constant idle valve with ptfe tape on the seal made squeaky clean with wd40, and it's still cutting out 
I'll try a spare AFM next, but don't think it's that. car idles perfectly and runs fine, then just cuts out on idle as if switching the ignition off, no stammer, no idle fluctuation or anything just dead.
John
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If it aint broke, fiddle with it until it is!
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93 33 16v Mirtle Met
08 Fiat Grande Punto Exotica Red
90 Yamaha FZR600 Genesis- Silky white/red/blue |
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BigAl
P4
Joined: 06 May 2003
Posts: 2990
Location: U.K Surrey
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| Posted: Thu Oct 20, 2011 4:19 pm Post subject: |
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Have you checked connection on the white wire at the ignition coil?
If this becomes loose the engine will cut out 
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john 33_16v
16 Valve
Joined: 27 May 2005
Posts: 1406
Location: herts, uk
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| Posted: Sun Nov 13, 2011 5:32 pm Post subject: |
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Seems to be sorted 
Spare AFM that I have had sitting in the garage for about 9 years fitted and a brand new bosch TPS. Car runs much much smoother with this AFM too -should have tried it before
Don't know if the original TPS was faulty or not, it seemed to click, but did feel sloppier than the new one when tested with a little finger.
John
_________________
If it aint broke, fiddle with it until it is!
- - - - - - - - - - - - - -
93 33 16v Mirtle Met
08 Fiat Grande Punto Exotica Red
90 Yamaha FZR600 Genesis- Silky white/red/blue |
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