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33bits · Posted: Fri Jan 29, 2010 4:38 pm Post subject: idles at 2k when warm?

My girlfriends 16v will often idle at 2000rpm when its warm, sometimes a quick blip of the throttle will bring it back to normal but not always. Anyone else witnessed this?
I'm hopefull it's just a faulty idle valve on the inlet manifold?
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155 sportpack
33 16v Sportwagon
33 Permanent 4
33 16v (for sale)
156 JTS sportwagon
contact me for any 33 parts. Alex, 07896-327708

RFlower · Posted: Sat Jan 30, 2010 4:12 am Post subject:

I had the same problem recently on my VW, which has a Bosch system similar to the 8 valve 1.7.

It turned out to be due to loose connections on the engine water temperature sensor, making the ECU deliver the wrong amount of idle fuel.

Check/clean connectors and plugs regularly. Sometimes simply unplugging and re-connecting them is enough, but look inside for dirty or corroded pins.

Remember, 99% of electronic problems are due to bad connections!
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Dick Flower, Nr. Carcassonne. '94 Trofeo 1.4 ie (F), '93 Imola 1.3/1.4 ie (now for breaking) (F), '91 1.7 ie (GB)(spare car), '86 Sprint 1.5 QV (F). '87 VW Syncro camper (F), '73 NSU Ro80 (F), '99 Fiat Seicento (F)

33bits · Posted: Sat Jan 30, 2010 5:50 am Post subject:

The old clothes are on, tools are out, i'm fitting brake pads to it now so your advice will be carried out sir, thanks.
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155 sportpack
33 16v Sportwagon
33 Permanent 4
33 16v (for sale)
156 JTS sportwagon
contact me for any 33 parts. Alex, 07896-327708

charlie-H79AMP · Posted: Sat Jan 30, 2010 2:16 pm Post subject:

let me know how you get on with that Alex, as my car has just started to idle at 2k when warm too.
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series 3 1.7 16v Green Cloverleaf

33bits · Posted: Sun Jan 31, 2010 3:22 am Post subject:

I fitted a new idle valve and all seems sweet so far, fingers crossed it was the fault. If it does it again i'll go down the recomended route of checking all the electrical connections. I think its sorted coz it would create the fault almost every time it got warm but hasn't sinse i changed the valve. Very Happy

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155 sportpack
33 16v Sportwagon
33 Permanent 4
33 16v (for sale)
156 JTS sportwagon
contact me for any 33 parts. Alex, 07896-327708

RFlower · Posted: Sat Feb 13, 2010 5:50 pm Post subject:

Could have been just the connection to the valve tho' Smile

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Dick Flower, Nr. Carcassonne. '94 Trofeo 1.4 ie (F), '93 Imola 1.3/1.4 ie (now for breaking) (F), '91 1.7 ie (GB)(spare car), '86 Sprint 1.5 QV (F). '87 VW Syncro camper (F), '73 NSU Ro80 (F), '99 Fiat Seicento (F)

33bits · Posted: Sat Feb 13, 2010 10:20 pm Post subject:

Well today it did it's old trick of the 2k idle again, has been behaving all week Exclamation

Spanners will be coming back out tommorrow.
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155 sportpack
33 16v Sportwagon
33 Permanent 4
33 16v (for sale)
156 JTS sportwagon
contact me for any 33 parts. Alex, 07896-327708

BigAl · P4 Joined: 06 May 2003 Posts: 2990 Location: U.K Surrey

Mine did the exact same thing today, i had my CTS connector off to check the output earlier, i guess the connections need cleaning as it went back to normal after a wiggle.
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x2 33 16v
pictures http://www.alfa-pages.co.uk/viewtopic.php?t=5203