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Thread: 4AGZE high idle but no boost leaks

  1. #1
    Junior Member Grease Monkey .:2DR-FTU:.'s Avatar
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    Exclamation 4AGZE high idle but no boost leaks

    Hello all, i have an ae82 with late model 4AGZE. I got this car last week and its had a high idle since. The car has a front mount fitted with no BOV, and idles between 1,500 and 2,000RPM. I dont understand whats goin on as there is no boost leaks (Boost guage sits on -20) and car drives fine. Anyone got any idea's, becuase im sick of people looking at me like im a try hard LOL. Thanks in advance
    Jarrad
    Quote Originally Posted by Cow Cow
    Here in Hong Kong, I have a Echo 1.3
    I put in a TRD exhaust manifold, TRD quick shift gear stick, K & N Air Filter, Ground Cable, NGK E spark plugs, 2 pcs of Voltage Stabilisers and twin HID systems.
    It goes like a rocket.

  2. #2
    is the bestest Conversion King LeeRoy's Avatar
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    Default Re: 4AGZE high idle but no boost leaks

    Youve prob got a vacuum leak.

    A high idle can also be caused by air in the cooling system but this shouldnt affect boost.
    Daily Driver: Red Ae93 Project: My TA22 - now with 3s-gte
    D is for Disco, E is for Dancing

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    Junior Member Grease Monkey .:2DR-FTU:.'s Avatar
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    Default Re: 4AGZE high idle but no boost leaks

    ok so i found a leak in the piping... fixed that, and i had to adjust the screw on top of the TB. the revs fluxuated still, and im thinking that yeah it maybe the cooling system. Thanks for the heads up
    Quote Originally Posted by Cow Cow
    Here in Hong Kong, I have a Echo 1.3
    I put in a TRD exhaust manifold, TRD quick shift gear stick, K & N Air Filter, Ground Cable, NGK E spark plugs, 2 pcs of Voltage Stabilisers and twin HID systems.
    It goes like a rocket.

  4. #4
    is the bestest Conversion King LeeRoy's Avatar
    Join Date
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    Default Re: 4AGZE high idle but no boost leaks

    If they hint then that would be my first port of call. There are other factors that will cause this too but im not sure what they are. Have a search on here as its been mentioned a few times before.
    Daily Driver: Red Ae93 Project: My TA22 - now with 3s-gte
    D is for Disco, E is for Dancing

  5. #5
    I see invisible people Backyard Mechanic WHITCHY's Avatar
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    Default Re: 4AGZE high idle but no boost leaks

    Hey Jarrad,
    I had this happen when I first put in my 4AGE. My TPS was out of whack! Find a 4AG manual and try and adjust it properly, or just loosen it and rotate it a bit each way and see if it changes anything! Mark where its at before ya move it incase ya problem is from air in the water system!

  6. #6
    Junior Member Grease Monkey .:2DR-FTU:.'s Avatar
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    Default Re: 4AGZE high idle but no boost leaks

    hey i just realised i wasnt adjusting the tps.. I yas adjusting the large screw on the throttle body.
    Quote Originally Posted by Cow Cow
    Here in Hong Kong, I have a Echo 1.3
    I put in a TRD exhaust manifold, TRD quick shift gear stick, K & N Air Filter, Ground Cable, NGK E spark plugs, 2 pcs of Voltage Stabilisers and twin HID systems.
    It goes like a rocket.

  7. #7
    is the bestest Conversion King LeeRoy's Avatar
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    Default Re: 4AGZE high idle but no boost leaks

    Idle screw?
    Daily Driver: Red Ae93 Project: My TA22 - now with 3s-gte
    D is for Disco, E is for Dancing

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