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The mkiv Supra Owners Club

supra idles too fast?


BaileySupra

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There's no pipe work connected to fmic, I just left it mounted so it was one less job to do? Il take it off and see if it helps. I will also try and slacken the throttle cable off abit but the nut in the picture didn't move when I took it off. If none of that works I will check for air leaks.

 

Thanks

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Cool one thing I did notice is when the cable isn't connected the throttle mechanism relaxes and has a smaller gap. Will this be the position it should be at? I'm thinking run the engine without the cable connected and see what it idles at then in theory I can adjust the cable?

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You can use a propane blowlamp (unlit.....), to find air leaks.

 

Would I be right in thinking you waft the end of the blowlamp around the hoses and if the idle picks up the engine is ingesting the propane through a leak? Does Butane work?

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yippee! my car now runs properly.i spent all bank holiday weekend investigating this problem on mine, swopping ecu,s over- no difference. swopped rotor arm over no-difference checked wiring around the engine, checked vacuums again e.g. pull them off one at a time to hear what's happening to the rpms only to find i had connected two vacuum pipes the wrong way round-the air control valve on the side of the power steering pump lol..lol...i think this happend when i changed my engine n gear box over last year something so small can have a big effect...lol..lol.....

hi ,this sound like something similar to mine at the moment and iv tryed some of the above like, disconnecting battery 10- 15 mins to reset ecu; cheak air leeks: clean up idle speed control valve plus i have a spare one i tryed. it did help doing some of thos things but not solved it yet so i think il cheak for wirer connection earthing points over the weekend....
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Well I'm glad someone managed to fix there's :tongue: im still idling at 1k.. when I cleaned the tb could I have disturbed the tps? I did open the valve manually to clean it but that's how Iv always done it? I did a vacuum test and removed the throttle cable but it stays the same! Failing that I'm thinking of trying another icv?

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