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My car idles SUPER low

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Old 04-18-12, 09:27 AM
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Tommy2JZ
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Default My car idles SUPER low

first i thought it was kind of cool because it idles super quietly. i personally like it but i heard this is a bad thing. it idles at around 200 RPM. any ideas??
Old 04-18-12, 09:38 AM
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Tabaka
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200RPM's...that's definitely low. It should be near 700. Either you have a vacuum leak, your IACV is dirty, have a bad ground, or your TPS is acting up. Start with the easy things first, check for leaks and clean the IACV and throttle body.
Old 04-18-12, 09:38 AM
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Justin2JZ
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Might wanna tighten up the throttle wire a bit to around 700-750rpm.
Old 04-18-12, 09:49 AM
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Originally Posted by Tabaka
200RPM's...that's definitely low. It should be near 700. Either you have a vacuum leak, your IACV is dirty, have a bad ground, or your TPS is acting up. Start with the easy things first, check for leaks and clean the IACV and throttle body.
ill show this to my brother because... i have no clue what any of this is. i like mechanics, just havent learned to much technical stuff. i know its supposed to be at a healthy 800 RPM's
Old 04-18-12, 09:51 AM
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Originally Posted by SRTGS300
Might wanna tighten up the throttle wire a bit to around 700-750rpm.
worth trying lol
Old 04-18-12, 09:53 AM
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scENFORCER
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I had a low idle for the longest time, couldnt figure out what it was for the life of me. I'm pretty sure I tried everything in the book.
Turns out my rpm gauge was off, showed 100-200 rpm at idle, when a OBD scanner showed 700 on its reading. Took me forever to figure that out; so that may be an easy answer for you.

Originally Posted by SRTGS300
Might wanna tighten up the throttle wire a bit to around 700-750rpm.
This didnt work for me (obviously because my idle was actually ok), but when I tightened it, it threw all my gears off..
Old 04-18-12, 10:10 AM
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Originally Posted by scENFORCER
I had a low idle for the longest time, couldnt figure out what it was for the life of me. I'm pretty sure I tried everything in the book.
Turns out my rpm gauge was off, showed 100-200 rpm at idle, when a OBD scanner showed 700 on its reading. Took me forever to figure that out; so that may be an easy answer for you.



This didnt work for me (obviously because my idle was actually ok), but when I tightened it, it threw all my gears off..
haha, well do sc300's idle SUPER quiet? like im not exaggerating when my car can pass off as "off" lol. the backlight is off on the tach so maybe the rpm gauge isnt working. im taking my car to my friend to he can connect it to a diagnostic machine to see if there is anything wrong with it
Old 04-18-12, 10:21 AM
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Tabaka
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If the idle was actually 200, it would run rough and probably cut off on you. You might have the same issue that scEnforcer has described. Have you run a code scanner or done an OBD1 code test just to see if your ECU is hiding any codes? It might be a good time to check it out.
Old 04-18-12, 10:27 AM
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My car is very quiet at idle. Since I removed the resonators it is just a tad louder, but not much. It idles about as quietly as my wife's 07 Civic
Old 04-18-12, 10:32 AM
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Originally Posted by Tabaka
If the idle was actually 200, it would run rough and probably cut off on you. You might have the same issue that scEnforcer has described. Have you run a code scanner or done an OBD1 code test just to see if your ECU is hiding any codes? It might be a good time to check it out.
it doesnt run rough it runs quiet sexily lol. only thing i did notice is, when i floor it at high RPM's a little ringing occurs in the engine. i have no clue what the heck that is.

i need to run the diagnostics machine asap lol
Old 04-18-12, 10:37 AM
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I'm voting IACV. They are a nightmare to fix sometimes.
Old 04-18-12, 11:10 AM
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Originally Posted by INTIMAZY
I'm voting IACV. They are a nightmare to fix sometimes.
looked the part off seems like a thing to look into AS i do a tune up because i need to remove the throttle body aswell =/
Old 04-18-12, 12:46 PM
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It idles at 300 but is it shaking? I would clean TB and check for vacuum leaks.
Old 04-18-12, 02:46 PM
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If I remove the battery in mine it idles extremely low for about a day and then it corrects itself.

Not a complaint, my car runs great, and nothing is wrong with it, just something ive noticed.
Old 04-18-12, 10:07 PM
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Originally Posted by GS4_Fiend
It idles at 300 but is it shaking? I would clean TB and check for vacuum leaks.
it gets kind of shaky when on the road, and i come to a stop, TB?


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