3.8 vibration

Topic: 3.8 vibration (Read 2004 times) previous topic - next topic

3.8 vibration

January 14, 2005, 11:46:27 PM

Hey guys everytime im in a stop light with the brake pedal on the floor the car starts to hesitate but when I start moving is ok what can it be, I changed spark plugs, cables etc

Re: 3.8 vibration

Reply #1 – January 14, 2005, 11:55:29 PM

Maybe the torque converter is staying locked?

Re: 3.8 vibration

Reply #2 – January 15, 2005, 12:06:16 AM

Is not the torque converter because my tranny and converter are 8 months old and this vibration has been there before i changed the tranny

Re: 3.8 vibration

Reply #3 – January 15, 2005, 01:12:09 AM

its the engine struggling to make power

Re: 3.8 vibration

Reply #4 – January 15, 2005, 11:31:14 AM

no the engine works ok when im moving it only exhitates when im in a stop light with the brake pedal , if i have the brake pedal on and hit the gas pedal a little it stops
:america: :sawzall:

Re: 3.8 vibration

Reply #5 – January 15, 2005, 02:54:27 PM

Does it stop vibrating if you just take your foot off the brake?
It could be a vacuum leak in the power brake booster.

Re: 3.8 vibration

Reply #6 – January 15, 2005, 06:10:43 PM

when i took the brake pedal off is not so bad but have to press the gas pedal a little so it stops the vibration

Re: 3.8 vibration

Reply #7 – January 16, 2005, 01:48:40 AM

What year is the car?. Idle RPM too low, TPS, IAC.....

Re: 3.8 vibration

Reply #8 – January 16, 2005, 10:42:14 AM

Mine does the same thing. And when in gear and holding the brake it idles about 500 rpms. If I bump it up to 900-1000 rpms it stops and doesn't shake anymore.