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Thread: V6 TB/Misfire/IAC Issue

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  1. 06-29-2011, 05:08 PM #1
    DTP
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    V6 TB/Misfire/IAC Issue

    Okay folks... Here it goes. I need help, again.

    My G started misfiring under WOT from idle, and then when cruises fine after that. The misfire and stumbling (for lack of a better term) is random as well.

    I do know that I have a P0505 CEL, it's for Idle Air Control Malfunction or something like that.

    I will be pulling the spark plugs tomorrow...


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  2. 06-30-2011, 11:06 AM #2
    keith6110
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    p0505 =






    When my v6 was acting up, I just changed the spark plug wires, spark plugs, distributor cap and rotor. Sound like you might have a wire that arc's off of your engine. That was my problem anyway.

    I also noticed, when I did the distributor. I had some major buildup on the caps contact points where the rotor meets the cap. I would recommend changing all of this if you haven't yet. I think its recommended to do it with the timing belt intervals.
    Last edited by keith6110; 06-30-2011 at 11:09 AM


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  3. 06-30-2011, 11:11 AM #3
    DTP
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    Quote Originally Posted by keith6110 View Post
    p0505 =


    Oh the IAC and TB were cleaned already. I took good care of the IAC lol.


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    Last edited by DTP; 06-30-2011 at 11:13 AM
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  4. 06-30-2011, 11:14 AM #4
    galantlvr34
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    Quote Originally Posted by DTP View Post
    Oh the IAC and TB were cleaned already. I took good care of the IAC lol. And, yeah I know what the IAC is Keith...


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    When you cleaned the iac you just wiped it off with a clean dry rag right and you didnt get it wet.
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  5. 06-30-2011, 11:15 AM #5
    DTP
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    Before I only had this problem when I had the a/c on and the idle dropped near 450-500


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  6. 06-30-2011, 11:15 AM #6
    DTP
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    Quote Originally Posted by galantlvr34 View Post
    When you cleaned the iac you just wiped it off with a clean dry rag right and you didnt get it wet.
    I hope so... It was awhile ago. Car ran fine for a few days. It was so dirty I had to turn the idle down with the screw.


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  7. 06-30-2011, 11:17 AM #7
    galantlvr34
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    wow that is low i would replace the iac that will cause the drop in the rpms and your CEL is on so that means your iac is faulty.
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  8. 06-30-2011, 11:18 AM #8
    keith6110
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    Quote Originally Posted by DTP View Post
    I hope so... It was awhile ago. Car ran fine for a few days. It was so dirty I had to turn the idle down with the screw.


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    I would pick up a can of carb cleaner and use it on the IAC if you decide to mess with it again. It Literally desolves foreign material in it.


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  9. 06-30-2011, 11:21 AM #9
    galantlvr34
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    Quote Originally Posted by keith6110 View Post
    I would pick up a can of carb cleaner and use it on the IAC if you decide to mess with it again. It Literally desolves foreign material in it.
    i dont know about that keith people have had problems with that lately.
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  10. 06-30-2011, 11:24 AM #10
    keith6110
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    Quote Originally Posted by galantlvr34 View Post
    i dont know about that keith people have had problems with that lately.
    lol, its cheap enough to rockauto a new one anyway if it came down to it.


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  11. 06-30-2011, 11:28 AM #11
    galantlvr34
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    Quote Originally Posted by keith6110 View Post
    lol, its cheap enough to rockauto a new one anyway if it came down to it.
    yeah his seems faulty now anyway especially since he has the iac code.
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  12. 06-30-2011, 11:29 AM #12
    DTP
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    Quote Originally Posted by keith6110 View Post
    lol, its cheap enough to rockauto a new one anyway if it came down to it.
    An iac will run about $300 or so...

    I've also tested it and according to somedata, it's within spec.

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  13. 06-30-2011, 11:32 AM #13
    keith6110
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    Quote Originally Posted by DTP View Post
    An iac will run about $300 or so...

    I've also tested it and according to somedata, it's within spec.

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    idk what I'm thinking of lol. Want a used one then?


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  14. 06-30-2011, 11:35 AM #14
    galantlvr34
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    Quote Originally Posted by keith6110 View Post
    idk what I'm thinking of lol. Want a used one then?
    Lol i find this one on ebay.

    http://cgi.ebay.com/ebaymotors/99-03...item4cf7ffdd68
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  15. 06-30-2011, 11:35 AM #15
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    Quote Originally Posted by keith6110 View Post
    idk what I'm thinking of lol. Want a used one then?
    Possibly... Shoot me a text.

    I'm gonna swap the I4 TB in for the time-being.


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  16. 06-30-2011, 08:41 PM #16
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    Turned out to be bad spark plugs. $8 or so later, im good to go.


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  17. 06-30-2011, 10:04 PM #17
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    Quote Originally Posted by DTP View Post



    Fixed a cylinder #2 misfire...
    Cleared the codes, but the P0505 came back on. I still need to swap the old TB back....
    -Andrew
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  18. 06-30-2011, 11:06 PM #18
    galantlvr34
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    Yeah the spark plugs look shot.You are going to have to get an iac if you want to use the v6 throttle body.The light is coming on so your iac is bad.
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  19. 07-01-2011, 11:56 AM #19
    Rach3T8G
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    Just go to a JY & see if you can find a V6 IAC
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  20. 07-01-2011, 11:57 AM #20
    DTP
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    Quote Originally Posted by galantlvr34 View Post
    Yeah the spark plugs look shot.You are going to have to get an iac if you want to use the v6 throttle body.The light is coming on so your iac is bad.
    Yeah, i think that may be the next step
    Quote Originally Posted by Rach3T8G View Post
    Just go to a JY & see if you can find a V6 IAC
    i'm having a helluva time finding an Eclipse/Galant with the V6. All are I4's!
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