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PO 402 EGR excessive flow..

Discussion in 'Technical Chat' started by themaine1, Oct 16, 2009.

  1. Oct 16, 2009 at 11:56 AM
    #1
    themaine1

    #1
    themaine1 [OP] Member

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    Alread spent $200 on this PO 402 error code to get it repaired and it keeps coming back. I can make it happen though, once the error is cleared. If i start it and drive it immediatly without warming up, the light will come on within a mile. if i let it warmup, the light will stay off, it is just when I am in a hurry and do not let it warm up, the light WILL come on. Runs great otherwise! Any thoughs, send em my way. Truck has 317K miles.
     
    themaine1, Oct 16, 2009
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  2. Oct 16, 2009 at 11:58 AM
    #2
    chris4x4

    #2
    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    Does it run rough at start up?
     
    chris4x4, Oct 16, 2009
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  3. Oct 16, 2009 at 12:06 PM
    #3
    98tacoma27

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    98tacoma27 is going full "SANDWICH" Moderator

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    What motor are we talking about? 2.4/2.7?
     
    98tacoma27, Oct 16, 2009
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  4. Oct 16, 2009 at 12:12 PM
    #4
    themaine1

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    themaine1 [OP] Member

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    Engine does not run rough at all, little loud till warm up, then ok...has exhaust manifold leak which does not help the noise. The engine is the 2.4L 4cyl.
     
    themaine1, Oct 16, 2009
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  5. Oct 16, 2009 at 12:13 PM
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    98tacoma27

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    98tacoma27 is going full "SANDWICH" Moderator

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    Some stuff. Not a lot, just some.
    What exactly was done to "repair" it?
     
    98tacoma27, Oct 16, 2009
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  6. Oct 16, 2009 at 12:13 PM
    #6
    chris4x4

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    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    It could be the Temp Sensor...
     
    chris4x4, Oct 16, 2009
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  7. Oct 16, 2009 at 12:21 PM
    #7
    98tacoma27

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    98tacoma27 is going full "SANDWICH" Moderator

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    It could also be a simple vacuum leak.
     
    98tacoma27, Oct 16, 2009
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  8. Oct 16, 2009 at 12:55 PM
    #8
    chris4x4

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    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    :thumbsup:
     
    chris4x4, Oct 16, 2009
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  9. Oct 16, 2009 at 1:00 PM
    #9
    98tacoma27

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    98tacoma27 is going full "SANDWICH" Moderator

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    Are you shaking you fidt at me!?!?!?!










    :rofl:
     
    98tacoma27, Oct 16, 2009
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  10. Oct 16, 2009 at 1:01 PM
    #10
    chris4x4

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    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    Yed I am you Sumobitch!
     
    chris4x4, Oct 16, 2009
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  11. Oct 17, 2009 at 4:46 PM
    #11
    themaine1

    #11
    themaine1 [OP] Member

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    Temp sensor was replaced already...thats the $200 already spent.
     
    themaine1, Oct 17, 2009
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  12. Oct 17, 2009 at 5:09 PM
    #12
    kevhogaz

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    kevhogaz Low Speed, High Drag

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    What temp sensor did you replace? The one for the EGR valve? If you did, did you test it first? I've been with Toyota a while, and I don't recall replacing too many of those switches.

    You said the light comes on immediately? I show the EGR circuit is a two trip kind of deal. Is everything plugged in? Is the valve functioning?

    Something doesn't seem right.
     
    kevhogaz, Oct 17, 2009
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  13. Oct 29, 2009 at 10:40 AM
    #13
    themaine1

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    themaine1 [OP] Member

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    they replaced the vacuum lines, seems to maybe have doner the trick...I HOPE!!!
     
    themaine1, Oct 29, 2009
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  14. Oct 29, 2009 at 10:48 AM
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    98tacoma27

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    :woot:

    Thanks for the update!
     
    98tacoma27, Oct 29, 2009
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