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#589361 03/30/03 05:16 PM
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mrsvt99 Offline OP
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When I go down a hill with my cruise control on it feels like the car is jerking back and forth. Anyone know what could be causing this?

#589362 03/30/03 05:28 PM
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CEG\'er
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Could you give us a little more information such as year, engine type, miles, does it do this any other time (such as a slight jerking under steady throttle at light loads)?


2000 T-Red SVT, #562/2150
#589363 03/31/03 12:49 AM
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mrsvt99 Offline OP
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Sorry. It is a 99 SVT with 80,000 miles on it. It pretty much only does it when the cruise is on.

#589364 03/31/03 01:37 PM
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This is just an idea. I hope you can follow what I am saying. I know I didn't do the best job of putting it into words.

Could it be that your cruise is kicking in and out because of speed? Are you right at the set point of the cruise?

Say you have your cruise set for 60mph. When you start going down the hill your car speeds up to 63mph. The cruise backs off of the gas and you slow down, say to 58mph. Your cruise then kicks in again and speeds you back up, past 60mph and then slows down. Could that be the problem, or am I totally off base?

My old 98 Tour would do that. It was a 2.0 ATX though.


Mike 1999 Tropic Green SE Sport Duratec MTX No major mods, just the aesthetic kind.
#589365 04/01/03 03:34 AM
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mrsvt99 Offline OP
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No it stays at the same speed. It just barely does it, but
you can feel it if you pay attention. It does it at any speed, whether your on the interstate or not, so I don't know what it could be.

#589366 04/01/03 03:55 AM
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Originally posted by mrsvt99:
No it stays at the same speed. It just barely does it, but
you can feel it if you pay attention. It does it at any speed, whether your on the interstate or not, so I don't know what it could be.



That's pretty normal in these cars, there is not a smooth throttle tip-in. It's more noticeable in the SVT than on the regular Dtec. When I put my SVT TB on my car, it became much more pronounced.


2000 WS6 Convertible A4 13.11 @ 107.5 with a lid, Ram Air and LTs Gone:95 Mystique LS Young America edition V6, MTX 15.6 @ 91
#589367 04/01/03 04:18 AM
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Yeah, having just made a 1200 mile trip in my '98 CSVT, I noticed that, too. It happened only on steep downgrades in the mountains, was really minor, and smoothed-out after the four or five seconds it took for the onboard computers to get their strategies in-synch.

Don't worry. Be happy ... That you have a CSVT.

#589368 04/01/03 03:27 PM
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It's much worse with the 3L, too.

Just have to give it extra throttle on the downhills.


'00 CSVT #570 - 3L hybrid '95 Mystique - 2001 3L

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