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Feel engine vibration through brake pedal

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PenguinGTI

Passed Driver's Ed
Hi Everyone, I replaced GTI stock battery with a Odyssey PC680 lightweight battery. I m sure I didn't touch anything related to brake. After installation everything works except I feel engine vibration through the brake pedal. When I rev the engine high, I can feel strong engine vibration through the brake pedal. Even it is idle, I still can feel the weak vibration. It wasn't like that before the mod.

What could be? The only reason I can think of. It might be because the stock battery weight was help damping engine vibration. After replaced with lightweight battery, the vibration came out. Am I correct?


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jshay

jshay

Go Kart Champion
Check your intake piping. It could be resting on your brake res.


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P

PenguinGTI

Passed Driver's Ed
mamock116 said:
I do not have any vibrations and I have the same battery. Very strange.
Click to expand...



Thank you! This help to rule out my damping assumption. Since the intake pipe run over the brake reservoir, I will check what jshay said tonight.


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lilonespaz

lilonespaz

Drag Race Newbie
Yeah check the pipe. When i had my cts intake improperly installed(My fault) it only sat less than a 1/4" off it and would bump into it on certain things and cause vibrations in the pedal. I reinstalled it and it now sits roughly 3/4" off of it any never had a vibration since.
 
Uberryan

Uberryan

Banned
Definitely the elbow of the intake resting on the brake res. Try to tighten it so it doesn't droop or sit on it. Stock intake had a small arm that extended beneath the intake to hold it up off the res.
 
zrickety

zrickety

The Fixer
If you have APR stage 2 pipe, you may need to slot the mounting bracket for better clearance.
 
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PenguinGTI

Passed Driver's Ed
Thank you everyone in this thread and the original thread i did the battery installation. Right, it is the intake sits on up of the brake reservoir cause the vibration. I fixed it! Appreciate you guys in the forum. Help each other out, makes diy easier. Thank you again!


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