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Old Apr 23, 2008 | 11:17 AM
  #8  
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mberndt
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Joined: Jun 2005
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From: Allentown PA, - Phila, PA
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Originally Posted by FallenAngelHIM
you are are a pure genius and very helpful man.
this car has had the AT swapped for an MT.
when that happened the idle was funky because we were running with the AT ECU at the time.
so my mechanic did something to the idle.
i've since did the MT ECU in the car and never touched the idle but now i know that is what is causing the problem and how.

and also that my understanding of MT is a bit messed up. I always thought it was safer and better to throw the car in N to slow down to stop. but now i think that is not even the correct way to do slow down to stop.
With manual u can use the engine compression to slow you down. This is the ideal way to drive a MT car. Instead of using your brakes constantly (like freakin AT drivers ) you use the engine to slow down.

However, when downshifting it is also beneficial to the life of the engine and drivetrain if you match the rpms with the gear you are shifting into. Its also called heel-toe. In other words it is not good to let the rpms decrease to the point where the engine will have to be "pulled" up to the rpm the gear requires. This usually happens violently and is the reason it should be avoided.

I could prob drive all the way to work without using my brakes
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