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Alright then. Fingers crossed we're all sorted for that. It seems I had a dud O2 sensor which has been swapped out now. So far, so good. Thanks very much everyone. (Now to sort the LPG and get that to run right, but that's for another day!)

Thanks, yes, I had considered both Crank and Cam sensors. I've been meaning to get a techstream laptop set up, but things keep getting in the way. Closest I have to live logging at the moment is Torque on Android.

That's my typo, only B1S2 has been changed so far. Happily I have the other 3 on hand, and they are all genuine. Cheers.

Hi I'm hoping to see if anyone can shed some light. I made the potential mistake of buying a highish mileage cheap LS430 with issues, and I'm getting to the end of my tether. So, long story short, the car runs absolutely spot on for the first 10 minutes when the engine is cold. Loads of grunt, smooth as you like, happy days. Once the car gets a little warm, and goes into what I will assume for now is closed circuit running, its gets rough. At idle in D the large sputters and lurches and is lumpy as holy hell. In driving it feels like its running on around 3-5 cylinders until you give it a good old kick in the pants and get it revving and feels/sounds like cylinders are being lit as the revs build. Like the engine is slowly coming to life/waking up If I manually shift around the box and keep the revs up over 2000rpm it settles down and becomes a delight again. Now for the list. P0300 - random misfire P0301-0308 - I'll get codes for a few different misfires on any/all cylinders, usually 3 or 4 stack up between resets. P0141 - O2 sensor heater circuit malfunction in bank 1 sensor 2 - this has been replaced, and the code persists P0171 - Bank 1 too lean P0601 – Engine control module (ECM) -memory check sum error P0003 - Fuel Volume Regulator Control Circuit Low P0101 - Mass Air Flow Sensor Circuit Range/Performance I also regularly get the flashing MIL lamp, but not in consistent driving conditions, i.e. can happen on light throttle cruising, heavy throttle acceleration or anything in between, usually only for a few moments. So, what have I done to try and sort these? Naturally, i assumed misfires = weak spark etc, so plugs and coils have been changed. No change. I was seeing the 0141 code a lot, so changed B2S2 O2 sensor. No change. I found an earth strap broken and connected to nothing under the car when changing said O2 sensor, so have replaced. I've cleaned the MAF, which was quite dirty, and seemed to smooth things out a little, for a short time. So yes, I'm at a loss! Anyone have any ideas before I consider drastic action?! Thanks

Perfect, thanks for that. I'll throw in a replacement in the morning. Much appreciated.

Hi I am hoping someone can help. I am battling through some rough running and a couple of codes etc, but while changing bank 1 sensor 2 O2 sensor, I have noticed that I have what looks like a braided earth strap bolted to the chassis, in the same kind of area but dangling into nothing. Does anyone have any pointers as to where this should attach? I think this might be the final piece in my puzzle. Thanks Luke

Ha, thanks Verbout, the alloys are truly awful at the moment. Once the weather dries up, I'll get them smartened up. Rest assured the car was only stopped like that while I swapped some cars around the driveway. No kerbing/scraping, just a wheel up. The Acre, yeah it was beyond grim. Using cotton buds to pull tar off the lock switches, it was so thick. *shudder* The body is straight, but has a few scratches and scrapes. Nothing a good bit of spit and polish won't sort. On that topic, any ideas how hard the paint is? On my Subaru and Honda the paint is super soft and marrs/swirls for fun, and I've only ever used a finishing pad and ultra fine compound. As a comparison, my old BMW I'd go at it practically with chisels and it wouldn't mark at all, such was the hardness of the paint.

Hi No caravans for me. That belongs to a neighbour. Though I am very tempted to put Paul's transmission cooler on anyway, seeing as he's local and its a simple upgrade.

Thanks all for the warm welcome. After a week of evenings and a weekend of scrubbing, my LS is now officially on the road. Here's the kind of grot I've been taking care of!

Thanks! There's a long way to go before its a 'lovely' Lexus! But I am working on it. Currently going through it cleaning years of being smoked in and general neglect. Ewww! I

Hi Just thought I'd take the opportunity to say Hi, my name is Luke and I'm new to Lexus, but not by a long stretch, to Japanese cars. I've just bought a Lexus LS430, and looking forward to learning, sharing and enjoying the ownership experience.