C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Hesitation....PLEASE Help...!!!

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Old Aug 29, 2009 | 07:07 PM
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Default Hesitation....PLEASE Help...!!!

My car mostly sees city driving. But today I got on the highway. I was cruising 75 mph in 6th gear. I accelerated in 6th and the car would hesitate and not speed up. Also the air conditioning would stop coming out of the dash vents and would come out of the lower leg vents every time it would hesitate. When I would let of the gas the air would come back out of the dash instantly. I shifted into 5th and stepped on it and it accelerated fine. When got off the highway and back in the city I had it in fourth and at a low rpm (1650) accelerated and it would do the same thing. Since I didnt have all that wind and tire noise from the highway I listened to see if I could hear something and I did. When the car would hesitate I coud hear a ticking noise from the middle dash or engine compartment. It didnt sound like a mechanical sound and it was very inconsistent when it would do it. 1st, 2nd and third gear seemed fine and I floored the car and it ran good all the way through. It seems it does it in higher gears and at a lower rpm..
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Old Aug 29, 2009 | 07:45 PM
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Vacuum leak somewhere, would be my thought.
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Old Aug 29, 2009 | 08:01 PM
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Originally Posted by Randy93
Vacuum leak somewhere, would be my thought.
yeah thats what my father told me... just dont know where to look for that...
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Old Aug 29, 2009 | 08:16 PM
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Originally Posted by darkstallion_69
yeah thats what my father told me... just dont know where to look for that...
sounds like in the area of the air director, never been there myself, but the mechanism that directs air to either upper or lower vents is, I believe, vacuum operated. A hose might be loose in that area. Maybe someone with a shop manual for your year can point you in the right direction
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Old Aug 29, 2009 | 09:17 PM
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Originally Posted by jackdaroofer
sounds like in the area of the air director, never been there myself, but the mechanism that directs air to either upper or lower vents is, I believe, vacuum operated. A hose might be loose in that area. Maybe someone with a shop manual for your year can point you in the right direction
sounds like a good start to find the problem thnxs..
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Old Aug 30, 2009 | 11:05 AM
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ttt
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Old Aug 31, 2009 | 09:41 AM
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ttt
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