alufront

Hi everyone
I have A 2000 ls WITH 97000 MILES and im having a strange problem laterl, in cold starts, the engine with vibrate severym but after the car si warm, eberything is ok.

I have done the following
1- new sparkplugs
2-new timing belt
3-new engine support
4-new drive belt and bearings

I have never encounter such problem, please advise
thanks

smokincigs

Maybe engine mounts? Transmission mount?

alufront

change them all, only happens when is cold, after driving a while it will disappear

etex

I have a similar experience with a 1998 LS. Only when engine is cold. The transmission is also sluggish during this time of warm-up, as if not really ready to go yet. After 2 or 3 minutes all is well. Obviously I don't have an answer for you.

RA40

iTrader: (6)

Curiously, what oil are you using?

Although you didn't state any codes, the Oil Control Valve (OCV) has also been discussed as part of a rough idle issue. Check that too.

etex

I use Mobil 1 Syn 0W-30 in the engine, and T-IV in the transmission.

RA40

iTrader: (6)

No PD chime here?

Check the OCV. Mobil 1 in your temps is like being in So. Cal, it should not be an issue. How has the oil drain service been? Hate to think there is a bunch of sludge in the pan that is hindering proper oil flow.

dhamiltonx

Did you find the problem? My 98 is vibrating the most at 45 mph first thing in morning. Sounds like tires but, I can feel it in netural when I race engine a little.

PureDrifter

iTrader: (10)

could be a lot of things but we need more in depth info, troubleshoot systems one by one and get at us with more info.

dhamiltonx

Not sure what I can tell you? I have taken to dealer and an independent.
They jump right to the mounts and say lets replace those first for $550.
This seems to be related to if the car is hot or cold and maybe the temperature. I drove it tonight and it was 74 degrees and the car was still ly warm from my drive home. Dove to the local hamberger joint and it drove without problem.
I don't get vibration in the shifter. Seems to be around engine) I thought the car was just running rough (when I accelerate to 2000 rpm). It again, is worst in the morning for the first 3 miles.
With it doing this in park, I guess I can eliminate tires and trans.
Anybody have a guess? I don't want to just spend 100s of dollars to guess.
Thanks for your help

PS: Nobody has checked the engine for analysis.

dashan

Exhaust leak, get some new exhaust gaskets.

Avatar

97k miles is LOW for engine mount problems. Also, if they were bad, it wouldn't stop once the car g

Avatar

97k miles is LOW for engine mount problems. Also, if they were bad, it wouldn't stop once the car got warmed up.
Check the harmonic balancer and make sure your MAF sensor is good as well as the throttle body system.