Confused

[CookseysLs]

hey guys have a question i have a first gen 2002 ls sport and lately since its been cold outside when im at red lights i feel the car shaking and or vibrating like a rough idle or a misfire but the car runs fine and according to obd2 scanner nothing is wrong do u think this has something to do with dvvc cuz when i went to get a oil change they told me radiator has never been flushed and my antifreeze and water has fully seperated im just lost cuz car runs great anyone can help me???

 

[FASTLLS]

Marginal COPs failing

 

[TDUB]

Have you replaced your valve cover seals? This is one of the most common problems with the LS but is a fairly easy fix as long as your at least a little bit mechanically inclined. It's been covered on here many times so do a search but a quick way to check is to pull out your COP's and see if they have oil on them.

 

[1LoudLS]

so your antifreeze and your water are in a epic battle with each other, or is it more like when two kids have to share the same bedroom and they have to draw a line down the middle of the room to keep it separated?

a bad DCCV shouldn't effect anything other than the climate control system, coils are the most logical thing to be looked at

 

[CookseysLs]

thanks guys ive been reading about these valve cover gaskets and coils and plugs so imma do em all at once its just too cold right now but u guys can lead me in the right direction to order the right parts i know to stay away from bosch but i keep hearing about e3

 

[trifelife]

What are you idling at when it does that? On very cold days my LS has to run for a WHILE before it gets comfortable. Until it does, it behaves like what you're describing but the RPM's drop down to about 500. Once it's been running for a while it's fine, and on days when it's not below freezing it's fine. didn't experience any of that last winter, and it was a harsher winter then.

 

[M4rk]

Well, you didn't search heard, did ya? Your symptoms (which I experienced as well) were covered under a topic that I made.

 

[CookseysLs]

sure enough you guys was right today i got a misfire code in cylinder 3

 

[FASTLLS]