Leaderboard

Hi, I am having the same problem all of a sudden this morning. I have a 95 LS400 w/ 98K, Had a surging idle, running rough, & the traction control light is blinking. Threatens to stall when I stop. I had a 91 LS before this one that had the same problem, I brought it to Lexus and they ran codes on it & said it was sensors, wouldn't say which ones. Quoted me big $ which I didn't have at the time so I took it home. Stopped on the way home & put Mobil gas in it and it started running fine for awhile, Had been using shell. Did some research on this forum & someone said it might be the Idle control valve or another valve, don't remember the name but I was able to buy them used & refurbished on ebay. Never needed to put them in though as it ran fine as long as I used Mobil gas. I put Shell in once after that because I could'nt find a Mobil and started having the same problem so I figured it had something to do w/ the gas. I have had this one for almost 4 yrs w/ no problems except for a small seep in the power steering rack, which I just keep an eye on. That's why I was so surprised today that I had this problem again. It ties in somehow to the traction control too. The car had 54K when I bought it so I figure it may need a tune up. Probably never had one yet, so I will have to take it in if this doesn't go away. If anyone figures this out I would appreciate a clue. I put some heet in it & drove it for awhile. We'll see if it helps.