Slight Vibration after parking and RPM go under 1000

camjohns · Mar 3, 2014

So i noticed this morning after i got to work that when i put the car in park, and the RPM's go under 1000, that there is a slight vibration that is noticeable and can here a strain on the fuel pump and engine.

I wasn't sure what to make of it, but thought it could be something with the fuel pump seal?

I replaced the fuel pump last summer, and didn't have any issues.

I would assume that if its a vacuum issue that i would get an check engine light, but Im not sure.

any thoughts?

hasasinator · Mar 3, 2014

i have been having the exact same problem too and cant figure out what it is. i thought it was something with the fuel system too

agginline86 · Mar 4, 2014

camjohns said:
So i noticed this morning after i got to work that when i put the car in park, and the RPM's go under 1000, that there is a slight vibration that is noticeable and can here a strain on the fuel pump and engine.

any thoughts?

idle should be 750
do you have any CELs? any exhaust mods? primary O2 sensor issue? IACV might just need a good cleaning

Igor · Mar 4, 2014

Clean out your IACV, TB while you at it and EGR valve. See if that takes care of it.

xci.ed6 · Mar 4, 2014

IACV &TB w/ carb cleaner (spray) through tb with intake off engine at idle, small, short sprays (might die occasionally) whole can.

EGR w/ removed carbon/carb spray + brush, make it shine! New gasket.