Do Not Sell My Personal Information Jump to content

95 Lexus ls400 Running rough loss of power

Recommended Posts

So I was driving my 95 going bout 55 or 60 and all of a sudden it jerks Trac light comes on along with cel starts kinda puttering I'd call it. Then it was barely doing 40 rpms would barely go above 2 grand I still had like about another 10miles to make it home. so I thought I'd just try to push it home it's not like it died... it started acting really funny so I decided to stop looked under and seen my cats red hot wouldn't really stat and if it did it "putted" really hard decided to tow it was throwing codes for o2s and maf I changed them different codes came up for a tps changed it still putting so I started looking on the forum everybody saying those kinda symptoms are o2s or maybe an ecu tps  an just a bunch of guess after beating my head on the wall for a few weeks I decided to go back check the fuses on the hood and efi2 I think is number 12 on the box was popped changed it.. fired right up like nothing ever happened so I put all the old parts back fired right up again it's bin fine every since... moral of the story check the fuses first....

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Similar Content

    • By vissine
      I got a dead battery last few weeks. When I jump to start it again, I notice it's idling roughly, white smoke comes out and later smoke gets thicker. I also smell gasoline. Scan tool does not show any code. Would it be ECM issue? The reason I think about ECM because it does not report any code although it is not drivable. Should I try spark plugs, spark plug cables, ignition coils, igniters, injectors ... first? Thanks!
    • By enksdad
      hi folks! my 93 ls 400 with 173k is the best car ive ever owned and despite a hurdle or two im not willing to give up on it yet. but this issue has me stumped. it starts and runs fine for about five minutes while i let it warm up then it starts puking a white smoke unlike any ive ever seen come from cars. (ive have nearly 30 different cars(and trucks) all toll and am no stranger to vehicles and their emissions) this happened overnight, i've never let it get hot and have always meticulously maintained it. for some reason im thinking its something kinda simple like egr or??? any shining lights would be greatly appreciated! i currently am unable to drive it. although i live in san diego, my motorcycle commute is getting chilly!!
      thank you in advance tim
    • By Akallday
      Hi all just bought my first lexus it's a 92 sc300
      I started it and it it just pouring white smoke out exhaust. It's also dripping oil mixed with fuel out the intake so I guess oils is getting burned in cylinders. It idles and runs really rough and shakes! Please help and tell me what gaskets I need to replace and so on.
    • By Lexygirl88
      I bought a 1993 ES 300 a year ago. The car ran perfectly for about 6 months now it doesn't run so great.
      When the problem first started I would loose power only on the first left turn I would take. It would act like my gas pedal wasn't hooked up, and once in a while it would just die. But after I got around the corner or restarted it, it would be fine.
      Then it started to not have any power on the first take off and some slow shifting onto first and second gear. But after it shifted it would be fine. The rest of the day.
      Now it has several issues.
      1. There is very little power at take off (won't go over 10 mph if your lucky enough to get it there)
      2. It backfires within the first 30 seconds of driving it (sounds like it's coming from under the passenger seat) but it only backfires once when u first start driving it.
      3. It doesn't want to shift, it takes forever. When it does shift it is very hard.
      4. On the freeway it is very slow to get up to speed and once you hit 60 it down shifts and won't go any faster. However if you can get it to go to 80 it's fine at 80 just not at 60-75 MPH.
      5. At every stop the shifting problem starts over until you have been driving for 20-30 min.
      We have had the tranny looked at and told it was practically brand new. My husband replaced the tranny sensors and some other relay sensors. But it hasn't fixed the problem. If you disconnect the battery long enough to clear the computer it will run perfectly for a day or two, then it will start all over. Any ideas what this problem is?
    • By jzcampb
      Ok, here's my story...
      I bought my car March 2013 with 165K miles.
      Since then I drove it 17K miles... mostly highway.
      When I first got it I realized it needed to warm up before it would shift into 3rd and then into OD. So I always let it warm up before getting on the road and it was never an issue. A couple over times over the last 5 months I noticed that when I'd start it after it had sat for about an hour, it would not idle properly. I would shut it off then restart it and it ran perfectly.
      About 7 weeks ago I made a quick stop and jumped back in and it was completely dead. Turned out the neg battery terminal was loose, and it started right up. During that time I noticed a little miss when driving from time to time. But it was barely noticable. Then about 5 weeks ago it began running rough. As long as I kept the gas on it was okay but the moment I took my foot off the gas it started running rough again. I took it to a local cottman transmission where I know the mechanic. He looked at it and said the sensors indicated it was clogged catalytic converters. He took the exhaust down and discover the catalytic converters had been hollowed out. Apparently the previous owner's mechanic did it. But I drove the car for 17K miles without cats so that wasn't the problem. Cottman ran diagnostics, replaced the plugs which were fouled saying that was the problem.
      I drove the car and within 4 miles it started having the same running rough problem. I decided to get it home which is about 60 miles and it really ran rough with the CEL starting to blink a couple miles from home. But it stopped blinking when I stepped on the gas. The next day I drove it 20 miles to a mechanic who is a friend. He had the car for 3 weeks, ran diagnostics, checked the timing, removing sluge from the valves and thought on 2 occasions he thought he fixed the problem until test driving it several miles and it would start running rough again. He checked the cylinder compression and told me the back ones were puting out about 80 psi while the front ones were at 120 psi and that had to be the problem. Said it would cost $1500 to fix but that might not even work because of the ollowed out cats. He said the last owner may have put oil additives in the engine as a temporary fix. But it ran beautifully for 17K miles. He suggested I get rid of the car. So I drove the car home and it really ran rough and didn't shift into OD.
      I picked up M1 Mobil synthetic oil and ring compression fix additive and changed the oil, filter and added the additive and put 93 Octane gas with fuel injector cleaner in the tank. I drove it 65 miles on a highway to work and with the exception of a couple misses it ran great. On the way home i got caught in traffic and it ran really rough and the trans continually would shift out of third and back into third gear. CEL would blink and stop randomly but mostly when I was at a slower speed.
      I read the cause could be the IACV so I removed it, cleaned it with CRC and reinstalled. Today I drove it 15 miles and it ran beautifully. I made a stop for 15 mins, jumped back in and noticed it wasn't going into OD. Made a couple more stops before driving home. With the exception of no OD it ran fine until I stopped at my driveway, put it in reverse and it started running rough again. I turned it off, waited a minute and started it, drove around the block and the running rough and high idling happening. The CEL was not blinking but I can only think it wouId have if I continued to drive the car. I started to think this is a computer problem. I should mention the CEL lit up 150 miles after I bought the car.
      I would love to know if anybody has any idea what is going on!! Sorry for the long story!
  • Create New...