Question about 2000 Mitsubishi Galant

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Idle surging chugging weird problem READ!!

2000 mitsubishi galant with 84thousand

when car is ideling sometimes it will bog down and almost die. It does this whenever it wants

Here the weird thing

I noticed when I hit the air cleaner box it chugged with car on and in park. So I cleaned the Mass air flow sensor. No change so I started hitting around and looking for vaccume leaks.

When I hit above the Throttle Body and a little after going to the engine 2 black air tubes. It chugs really bad and gets worse as I hit it harder So i am pretty sure it is something in throttle body area probably some sensor.

Can you point me in the right direction as where to start looking and or replacing origanally I was thinking it was the IAC valve but I don't understand why when I hit it, It chuggs baddddd


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  • jeanettel357 Jan 20, 2009

    Its my wife car and she never gets close to 4K rpm.

    Car drives great up until this happens. Idle revs normal when starting it is just that it tries to stall then it catches itself and returns to normal and when I open the hood and hit around the throttle body it starts to die and the harder I hit it the more it tries to die.

    I have tried cleaning the intake with Sea Foam without much luck.
    I want to check the Idle Air Control valve but can't seem to find it easily any ideas where it is located??

  • slixxsta Apr 09, 2009

    my air manifold was cracked also stalling,get some jb weld and patch it up just dont get it on the bolt/nut assembily


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Hey common problem w/the 2000 galant. you may need a mirror to see this, look and or feel where your throttle body mates up to your intake manifold. it has a problem of cracking, when you have an air leak there it will run like **** and usually shut off depending on the severity. this will cause you to get the throttle position malfunction code. if that is the case instead of buying a new or used intake manifold. take the old one off, and you can actually cut it flush and weld about a 2 inch in length tube to repair the crack. well let me know how it goes.

Posted on Feb 01, 2009

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I had similar problem i have 00 galant 2.4 and mine would do this randomly as soon as it would start it did throw a code for throttle position scensor malfunction I replaced it and it hasnt done it yet its been a couple of weeks does your car rev up really high when you start it like real high or is it normal does your motor vibrate bad or do you have a vibration in the gas pedal at about 4000 rpm

Posted on Jan 18, 2009

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