nevins Posted December 30, 2008 Share Posted December 30, 2008 Can anyone help shead some light on a problem with my mkIV. After start up and a shrt while the car keeps dieing at junctions without warning or has a very low idle speed. Once started again the car drives fine and will do for the whole day, its one of those annoying faults can someone please help , im going mad with it.[sAD][/sAD] Quote Link to comment Share on other sites More sharing options...
Guest Mikael Posted December 30, 2008 Share Posted December 30, 2008 Any codes? Mikael. Quote Link to comment Share on other sites More sharing options...
nevins Posted December 30, 2008 Author Share Posted December 30, 2008 only code thats in the memory is for the vehicle speed sensor as i'm waiting for toyota to order one in for my car as it aint fun driving a supra with no speedo with the cops around my way Quote Link to comment Share on other sites More sharing options...
Scooter Posted December 30, 2008 Share Posted December 30, 2008 only code thats in the memory is for the vehicle speed sensor as i'm waiting for toyota to order one in for my car as it aint fun driving a supra with no speedo with the cops around my way no speedo? ie it just stopped working one day? Is your car still limited to 112mph? Some delimitors can fail with age giving the sort of problems you describe....... Quote Link to comment Share on other sites More sharing options...
miko_supra Posted December 31, 2008 Share Posted December 31, 2008 What is your fuel consumption like? Do you have an AFR gauge fitted? And is the car fully up to temperature when this occurs? Quote Link to comment Share on other sites More sharing options...
dangerous brain Posted December 31, 2008 Share Posted December 31, 2008 Er sticky idle control valve. My supra used to do that. little blip on the gas pedal as you slow to an almost stop used to prevent cutting out. Mine didn't do it all the time just when it was boogerin cold outside. Quote Link to comment Share on other sites More sharing options...
nevins Posted December 31, 2008 Author Share Posted December 31, 2008 the cars delimited and speedo works most the time just drops out for a while when it does and blipping the throttle does not stop it from dieing but i have to change the plugs so il be cleaning the butterfly and valves when doing this Quote Link to comment Share on other sites More sharing options...
Guest vvtiguy Posted December 31, 2008 Share Posted December 31, 2008 There is an identical problem becoming more and more common with the Lexus LS400 (1UZ) This is caused by a build up of crap around the back of the butterfly in the throttlebody. I'd put a tenner on it being the same problem with yours. Simple to check. Just unbolt the throttlebody and spray it heavily in carb cleaner. You may find it worth using a small wire brush to get off all of the carbon. Just keep at it until it looks brand new. I did this on my dad's LS400 and it was perfect after that. Never cut out again. Quote Link to comment Share on other sites More sharing options...
nevins Posted January 1, 2009 Author Share Posted January 1, 2009 started doing some work on the car today butterfly was coked right up and has not cut out since cleaning, finally a fault that doesn't brake the bank lol. thanks for the help with finding the fault everyone. Quote Link to comment Share on other sites More sharing options...
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