LupoEnvy Posted January 12, 2009 Report Share Posted January 12, 2009 Bit of a mystery - I get this once in a while since I bought Loop a year ago, becoming slightly more frequent now...When I'm braking quite hard and usually turning for (say) a roundabout, the engine cuts out (battery light comes on), which means no power steering and weaker braking, which is pretty terrifying cutting across a roundabout!). This happens when the engine is warm too, so its not due to a cold engine or cold weather.I was thinking of possibilities:1) Is my 'idle' set too low, so cuts out when power steering and braking drain the battery? Its about 650rpm or so when warm (its a standard 1.4 16v Loop)2) Is it the battery - other than this, I've had no battery problems and no major problems starting it, even in the cold weather we've had3) Could it be the fuel filter getting clogged as gunk is thrown forward during braking?4) Could it be the fuel pump being weak?5) Power steering draining battery too much? Fluid level is fine.6) Too many things draining the battery, e.g. lights, heater on a little etc7) ...Loop doesn't like roundabouts???Any thoughts gratefully receivedEnvy Quote Link to comment Share on other sites More sharing options...
Gibbeth! Posted January 12, 2009 Report Share Posted January 12, 2009 More than likely to be the throttle body is a bit dirty, bit of carb cleaner and a wipe round should do it the world of good! Quote Link to comment Share on other sites More sharing options...
bobbo Posted January 13, 2009 Report Share Posted January 13, 2009 I used to get this a bit, tried allsorts but what worked was some wynns petrol cleaner which pulls any moisture out of your petrol tank. Havn't had any problems since Quote Link to comment Share on other sites More sharing options...
Nathan_S Posted January 13, 2009 Report Share Posted January 13, 2009 sounds a bit like mine so it could be:ignition timing (THIS FIXED MINE! and was free and took 10 mins if you local to birmingham i can have a look for you ) spark plugs/ leadsbad earth good luck! Quote Link to comment Share on other sites More sharing options...
cafcross Posted January 13, 2009 Report Share Posted January 13, 2009 Limp mode fail. Happened on my mate's Golf mk4. Was the water pump. But could be anything tbh Quote Link to comment Share on other sites More sharing options...
L119 UPO Posted January 18, 2009 Report Share Posted January 18, 2009 Bit of a mystery - I get this once in a while since I bought Loop a year ago, becoming slightly more frequent now...When I'm braking quite hard and usually turning for (say) a roundabout, the engine cuts out (battery light comes on), which means no power steering and weaker braking, which is pretty terrifying cutting across a roundabout!). This happens when the engine is warm too, so its not due to a cold engine or cold weather.I was thinking of possibilities:1) Is my 'idle' set too low, so cuts out when power steering and braking drain the battery? Its about 650rpm or so when warm (its a standard 1.4 16v Loop)2) Is it the battery - other than this, I've had no battery problems and no major problems starting it, even in the cold weather we've had3) Could it be the fuel filter getting clogged as gunk is thrown forward during braking?4) Could it be the fuel pump being weak?5) Power steering draining battery too much? Fluid level is fine.6) Too many things draining the battery, e.g. lights, heater on a little etc7) ...Loop doesn't like roundabouts???Any thoughts gratefully receivedEnvyYou need to remove the Idle control Valve from the throttle body, it will be coked up with sticky soot. Then give it a good clean out with carb cleaner until it's all nice and shiney inside.Job Done. Quote Link to comment Share on other sites More sharing options...
steve200 Posted January 22, 2009 Report Share Posted January 22, 2009 I has the same problem with the Lupo S, every time I slowed for a junction or roundabout.Just got some carb cleaner, and cleaned the throttle body, and its been fine ever since. Quote Link to comment Share on other sites More sharing options...
Tallika_Fan Posted January 22, 2009 Report Share Posted January 22, 2009 You need to remove the Idle control Valve from the throttle body, it will be coked up with sticky soot. Then give it a good clean out with carb cleaner until it's all nice and shiney inside.Job Done.Where abouts is the valve and is it easy to remove? Mine hunts and seeks when cold, usually oil/gak buildup in the throttle body, wouldn;t mind giving the valve a clean though. Quote Link to comment Share on other sites More sharing options...
LuPo SpOrTX Posted January 22, 2009 Report Share Posted January 22, 2009 My sport cut out whilst travelling across Rochester bridge at about 60mph (had my foot off the accelerator), turned out to be the breather pipe which had a bend in it, stopping it from err breathing I also had a problem a few months back where my car cut out a few times battery light etc came on and it turned out to be the throttle body just needing a clean, my car ran much better afterwards as well...Good luck! Quote Link to comment Share on other sites More sharing options...
L119 UPO Posted January 22, 2009 Report Share Posted January 22, 2009 (edited) Where abouts is the valve and is it easy to remove? Mine hunts and seeks when cold, usually oil/gak buildup in the throttle body, wouldn;t mind giving the valve a clean though.The ICV will be very near the throttle body (bolted to it), it will be small, metal and most probably bolted on with 2 or 3 caphex head screws.Cleaning this involves removing it and cleaning inside, a toothbrush will help here too. Cleaning the throttle body alone won't cure a sticky ICV for too long.Never done it on the loop before, so I hope this helps. Edited January 22, 2009 by L119 UPO Quote Link to comment Share on other sites More sharing options...
Tallika_Fan Posted January 23, 2009 Report Share Posted January 23, 2009 The ICV will be very near the throttle body (bolted to it), it will be small, metal and most probably bolted on with 2 or 3 caphex head screws.Cleaning this involves removing it and cleaning inside, a toothbrush will help here too. Cleaning the throttle body alone won't cure a sticky ICV for too long.Never done it on the loop before, so I hope this helps.Cheers bud, might see if i can give this a go later today. Quote Link to comment Share on other sites More sharing options...
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