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The mkiv Supra Owners Club

high idle issue


Parry_10
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hi guys iim no expert but have you guys had alook at your butterflys in the throttle? just as im sure i heard somewhere that they get a build up with crap over the years and become abit sicky! so i might be worth a quick check and a clean with abit carb cleaner! also check vacume all tho i think i leak my lower revs not raise them but like i said im no expert! hope this was some help to yous!

 

and i hope you guys find out the problem! as there is nowt worse than a fault you just cant pin point! :thumbs:

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just noticed i must of knocked the pipe off at the back of the inlet manifold put it back in and its back to how it was idling at around 1200-1300rpm, so cleaning the icv and resetting the battery has made no difference also I have just fitted a new o2 sensor I am getting fuel cut at 5000rpm now and it must be because of the high idle as when I got my car dynoed by ryan it was fine he set up the fcd and it didnt hit fuel cut at all

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Throttle butterfly, check all the vac lines on the inlet for air leaks as well

 

Already been over all my vac lines....

 

This was my problem http://www.mkivsupra.net/vbb/showthread.php?240395-Whats-this-(with-picture) reconnected it and its sorted now.

check yours is still connected, (the rod)

 

Pretty sure I checked this other day and it was good but now you have me thinking lol...

 

just noticed i must of knocked the pipe off at the back of the inlet manifold put it back in and its back to how it was idling at around 1200-1300rpm, so cleaning the icv and resetting the battery has made no difference also I have just fitted a new o2 sensor I am getting fuel cut at 5000rpm now and it must be because of the high idle as when I got my car dynoed by ryan it was fine he set up the fcd and it didnt hit fuel cut at all

 

So you fitted a new O2 sensor and since then you're getting fuel cut ? Why do you say this has to be from the high idle then ? Have you maybe tried swapping back to your original O2 sensor in case the new is duff........meister :D

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