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Old 03-13-2007, 01:00 PM   #1 (permalink)
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haydaze
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My 2005 Tucson GLS 2.7L developed an intermittent hesitation problem late last fall. It occurs mostly (but not always) on cold days, from a full stop. Itís worse on inclines. Iíve taken it to the dealer 3X. The first time they told me a vacuum line had a split in it, they replaced it, and it was fine for a few weeks. The second time they said my air filter was filthy (it wasnít), replaced it, and it was fine for another few weeks. This third time, theyíve decided itís a fuel contaminant and theyíve recommended replacing the fuel filter, fuel pump, and fuel tank. I decided to pursue other options. I thought initially that it was a fuel issue, now Iím wondering it itís an oxygen sensor problem. Any ideas?
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Old 03-13-2007, 04:40 PM   #2 (permalink)
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Robh2
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I have heard of people with this same issue and it was the air intake. Follow the tube from your filter to the engine and make sure everything is tight and sealed.

I hope thats it.

Good luck.

Robert
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Old 03-15-2007, 03:11 PM   #3 (permalink)
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haydaze
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Thanks. I'm going home now and see if that's the problem...
Well, shoot. Nothing obvious showed up. If the problem was a constant issue, then I think I could find the source. But, since it's not all the time, I'll have to wait for the next episode.
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Old 04-11-2007, 09:29 PM   #4 (permalink)
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Check to make sure the hose clamps for your air intake tube are good and tight, these come off all the time on early Tuscons and cause the problem you describe. It also could be the accelerator cables are too tight, with the engine cover off, by the throttle body there is a short (4" or so) length of exposed cable between the bracket and the TB itself, if these are too tight, it can cause a similar issue, again it was something I saw on earlier model Tucsons.
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