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  #1  
Old 9th July 2011, 11:51 PM
jeast jeast is offline
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hesitation

i have an 07 with 13500 miles on it i have hesitation at very light throttle and the idle is erratic. i have done the tps, tb sync, i dont know what else to do.
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  #2  
Old 10th July 2011, 01:06 AM
RecoilRob RecoilRob is offline
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You are real close to the suggested 15K service where the valves should be checked. A tight one or three can cause drive-ability problems for sure. Spark plugs should have been changed a couple times by now too. And, checking for loose TB boot connections and other vacuum leakage a worthwhile thing to cross off the list. The '07 shouldn't be surging/hesitating at all if everything is up to snuff.
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  #3  
Old 10th July 2011, 01:13 AM
jeast jeast is offline
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ive done the plugs, ill check for vacuum leakage tomorrow. thanks
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  #4  
Old 10th July 2011, 03:09 AM
jeast jeast is offline
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are there alot of vacuum connections i should be looking for?
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  #5  
Old 10th July 2011, 04:57 AM
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Have you ever properly set the TPS? Done a TB sync?
If not, they are likely the source of your issue.
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  #6  
Old 10th July 2011, 05:34 AM
jeast jeast is offline
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those were the first things i did.
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  #7  
Old 10th July 2011, 06:03 AM
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Idle speed set over 1250? Check for stored codes?
At what RPM are you having this hesitation?

It could even be a bad TPS.

A spray bottle with water will work for helping to locate/determine a vacuum issue.
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  #8  
Old 10th July 2011, 12:40 PM
jeast jeast is offline
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ive had it set at 1200 then it wanted to start cutting off so i had to bump it up over 1250 and it still wants to move all over the place. it seems like it can happen in gear i could be starting off with minimal throttle it happens or cruising in gear with minimal throttle.
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  #9  
Old 10th July 2011, 12:41 PM
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o yea no codes i checked that day before yesterday when i did the tps
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  #10  
Old 10th July 2011, 01:41 PM
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You may well have an STV motor going south. It's happened before (though rare).

A vacuum problem is the sort of thing that wouldn't be intermitant.
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  #11  
Old 10th July 2011, 02:02 PM
jeast jeast is offline
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thanks ill try do to some investigative work today with my electrical meter
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  #12  
Old 10th July 2011, 02:38 PM
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I have one more question.
When you did the TB sync, did you sync it at idle? Or did you run the RPMs up?

If sync'd at idle, it could be off just above idle and not work well. I generally set it for the best average from idle to about 3 grand or so.

I'm not trying to insult you. Just trying to help you find a free solution if there is one.
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  #13  
Old 10th July 2011, 03:42 PM
jeast jeast is offline
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no problem, one thing i just noticed i took the air cleaner off arent the stv supposed to open fully then return to any position when i turn the ignition to on? they opened fully but didnt return to the previous position.
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  #14  
Old 10th July 2011, 03:47 PM
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They should cycle again when powered back up. They will open after being powered down.
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  #15  
Old 10th July 2011, 04:17 PM
jeast jeast is offline
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ok they just stay open until i start the motor then they slowly i mean slowly start to close. then i cut the motor off then just put the switch to on then they go back to be fully open again
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