Question about 2003 Toyota Corolla

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'03 Toyota Corolla 1,4 VVT-i 4ZZ engine idle rpm

'03 Toyota Corolla 1,4 VVT-i 4ZZ engine idle rpm too low, shaking. How can be adjusted?

Posted by fomaria on

  • Anonymous Mar 28, 2014

    07 Isuzu i290
    engine idling up and down at low rpm

  • Anonymous Mar 28, 2014

    07 Isuzu i-290
    engine idling up and down at low rpm

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2 Answers

Kiri105

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Idle is factory set and cannot be adjusted, your best bet is checking for cracked hose pipework for air intake at idle,(not at problem under exceleration and driving) Any slight upset to the air /fuel ratio will be most prevelent at idle speeds.Check hoses where the meet metal flanges on manifold intakes and any sharp bends in ppipes.Good luck

Posted on Apr 05, 2010

  • Jon Sanger
    Jon Sanger Jan 08, 2012

    Try Redex injector in your next tank of fuel usually stops bad idling at least you eliminate a fuel problem? (this solved my idling)
    Or possibly a faulty mass air flow sensor? (which was the problem on my partners micra)
    I have the previous model of Toyota corolla 1.4 vvti, hope this simple solutions helps if your still having problems?

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Z Man Red

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Check your idle speed control valve situated at the bottom of the throttle body. Sometimes the valve sticks and will make the engine rev high or low at idle and the ECU can't adjust it properly.

Posted on Sep 09, 2010

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4zz , first post ever with some one how knows what is there
bravo that. but skips year, so is it a 2000 year?
what country? this is a USA web site, so...... what country.

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year 2000? corolla.
so says wiki,
crank pulley, big nut torque.
ill log in for you, and read, just because you said 4zz (rare)
ahh, cwap, only 4 engine used here, non, 4zz
80 to 102 ft/lbs for all non 4zz
i can find in usa, so I googled for you
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http://www.andriuz.skynet.lt/soft/auto/corolla/COROLLA%20ENGINE%20&%20CHASSIS%20MANUALS%20&%20SUPPLEMENTS/COROLLA%20ENG%20MANUAL%203ZZ-FE%20%26%204ZZ-FE%20RM928E32.pdf

102 it says.
i recommend buying a real FSM for your car , for your country.
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