Pushing on Brakes Moves the RPM??

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Jul 19, 2008 | 02:24 AM

poorb0i

Thread Starter

HCF Member

Joined: Feb 2005

Posts: 26

Pushing on Brakes Moves the RPM??

I have a weird problem. When i press on the brake on a cold start the RPM jumps down a lot, and when the engine warms up it does the opposite?? what causes this?? I have a 98 HX 166k miles that i recently convert to MTX.

Jul 19, 2008 | 04:36 AM

RonJ

Recognized HCF Member

Joined: Sep 2007

Posts: 9,453

From: Houston, Texas

RE: Pushing on Brakes Moves the RPM??

What is your normal idle rpm and how much does it increase (warm) or decrease (cold) when you press the brake pedal?

You may have a problem with your brake booster. Do you need to apply an large amount of force at the pedal to brake?