97-SC300

iTrader: (17)

I noticed on my 2003 GS430 the car feels to vibrate a bit when the engine is warmed up and I'm sitting at a stoplight idling...

Is there a known fix for this issue or do you basically learn to live with it?

flexspeed

how many miles you got? check your motor mount to make sure they are not bad... idle might be a little low ,,, but what its on when your on idle? you might need to check the TPS...( thottle position sensor... ) hope this help... its a start

tiger4life

iTrader: (16)

i need suggestions too. I have a gs 300. 1st I cleaned the throttle body, then spark plugs. I just had timing belt and motor mounts done a week ago. I'm doing trans mount tomorrow because I still have vibration in the steering wheel at idle. It's seems to be getting worse though so it might be a vacuum leak.

GS4_Fiend

iTrader: (22)

Does it still vibrate with the a/c on?

KingNasGS4

iTrader: (22)

try motor mounts

ThomasGS4

iTrader: (19)

Just turn on your headlights if it starts bothering you.

fuzzzz

iTrader: (19)

Tune up, using wrong gas, or replace motor mounts.

TLcoats

iTrader: (11)

Do it. Motor mounts should fix this problem. Pretty much any car over 80k needs new motor mounts.

geeznuts

iTrader: (14)

Mass air flow sensor needs to be cleaned too

92sc300nj

iTrader: (1)

if it started only a short time ago.. i would suggest checking for a vaccuum leak first. depending on mileage of the car.. engine mounts could be a problem but i think the trans mount would cause more of a problem while driving. i would try doing an ignition tune up after doing a vaccuum check because some of the hoses may be brittle from heat and time

HGill

Clean the throttle body and run some injector cleaner, had the same problem and it went away after I cleaned everything up.

GS4_Fiend

iTrader: (22)

The op never came back lol?

deadgirl

there is a serious rough idle when I hit a red light and I'm currently trying to run some diagnostics on my TPS, which took a crap. Could it be that along with cleaning out their throttle body that they should check their TPS, as well?