carlo

Hi Guys, RE: judder problem. Seems sorted with a replacement throttle censor. Will be taking on a long run to confirm soon. Thanks for the tips & comments. Cheers, JM

Hi Avril, Glad you discovered the earth leakage. I ended up buying another battery since I got fed up arguing with Teesside Lexus that their battery was faulty. Their tests said otherwise so that was it. Took it to an auto elect. garage who said the tests showed OK but that with it being sealed they could not say conclusively that there was no fault. I don't think I have a drain since the replacement battery hasn't lost charge even with the car not being run for several days. I'll not be buying a battery from Lexus dealer again, that's for sure! Cheers, JM

I tried to do same with my 1990 LS400 but 2 companies said the car was too old for their diagnostics & didn't want to know. Guess there's a threshold for these guys? JM

:duh: Hi Guys, Please help throw some light onto this problem. I posted a few weeks ago about the judder at mi-speed. Things getting progressively worse. 1990 LS400 142,000miles. Recently started to judder at 40mph after running for 15 minutes or so & having accelerated OK. Had plugs changed. Air filter. Petrol additives to clean jets etc. No change. Sent to garage. Diagnostics showed code 41 so new throttle position censor fitted. Worse! The diagnostic also showed Codes 25 & 26 ( air fuel ratio lean / rich respectively ) but garage said that was related to need for replacement cat at OUCH! cost. I don't want to be paying big bucks for new cat if that isn't going to solve the judder problem. But will, if it's the problem. The judder was so bad today at 40mph car almost stalled. Revs are OK at idle. This problem doesn't happen till car has run for awhile so garage wasn't able to feel it. Advice please before going back to garage & becoming much poorer!! Thanks in advance. JM

Thanks for that bit of information. JM

Hi Guys, Thanks for all the comments on this. Had to travel in the 1.4 Almera & got tennis elbow for the pleasure after 650 miles. I don't think it's a gear shifting issue as the judder is quite pronounced. I think it's a petrol thing & hopefully just the filter. It goes fine on first use with the auto choke on but after a run & around 50 mph it judders badly. I'll probably book it into Teesside Lexus ( near Yarm ) in the next week or so if my general mechanic guy can't suss it ( rather significant differences in labour costs prompts this action ) though I'd apprerciate comments on the benefits of having a Lexus diagnostic done. Meantime, Thanks again for the help. JM

Sorry! Meant 95. JM It's going into my local Lexus garage after Easter. Will reveal the fault when it's discovered & cured ( hopefully ). Cheers, JM

JUst recently bought 8 Denso plugs from EBAY for £25. Brand new. Cheers, JM

Hi Guys, Thanks for the thoughts. I know it's a strange one. I've put additive into petrol to ensure it's not carbon build up & to clean out jets. The plugs were Denso & the battery was kept on trickle charge over winter. I do think it's engine related since the hesitation ( judder ) in power feels like fuel starvation. I've heard of judder from prop shaft rubbers but would that tend to occur at a certain speed or be a constant symptom? I've always used normal unleaded petrol ( not supermarket ) 85 octane & wondered if a higher octane was needed? What is the throttle body that might need cleaning inside? All suggestions gratefully received - but beginning to look like a long uncomfortable trip in the Almera! Gulp! Cheers, JM

Hi Guys, Just put the Mk1 LS400 back on the road after its winter rest to get ready for trip to France this weekend. Felt it wasn't performing as well as usual on its way for service. But, new set of plugs, clean air filter, general service, & it seemed ok. BUT! get it up to normal running temp. and accelerate to 70ish, then drop down between 40 - 55 and it judders - feels like a petrol starvation but the revs are ok & it idles smoothly. Ok at low speeds, 30ish but that mid range brings back the judder. Any ideas of cause? Plugs are recommended for model. I've onl;y one day before leaving & will have to revert to Nissan Almera instead if no solution. HELP!! Cheers, JM

:D Thanks guys. Lots of useful info here and some relief too. Cheers, JM

:duh: Hi Guys, So Gordon's announced his tax rises & the motorist is hard hit again. I wondered what was meant by GAS GUZZLERS whose cost for road tax is to go up to £400. The LS400 is a big engined car - does it fit the category even tho mine does 30 MPG on a run? Maybe it's limited to 4 x 4s? Anyone any the wiser?? Cheers, JM

Cheers mate, the winter standing areas will be covered ok. I was more concerned about having potential problems looked at before heading off again for a 3000 mile round trip - like things that are weak spots on the LS400. Hard to get European breakdown insurance for this old model. Cheers, Carlo

:duh: Hi Guys, With Spring in the air it will soon be time for my LS400 Mk1 ( 1990 ) to be put back on the road having been stood since end September. Run over the Summer for 5000 miles to France & back. I get it serviced & MOT each Spring by a jobbing mechanic - all fluids, brakes checked etc. Is there anything you might suggest should be specifically examined for peace of mind? The only thing I'm aware of is a bit more play in the steering. Cheers. Carlo

I had the same problem - purchased an OLDHAM Battery failed after 18 months (6000 miles) but obtained a replacement no trouble at all on production of original receipt - incidentally cost of original battery was £54.00 inc. This was from a local Tyre Battery agent - Mk IV LS400 1998 I had the same problem - purchased an OLDHAM Battery failed after 18 months (6000 miles) but obtained a replacement no trouble at all on production of original receipt - incidentally cost of original battery was £54.00 inc. This was from a local Tyre Battery agent - Mk IV LS400 1998 Hi Guys, Thanks a lot for the replies. I'll look in Yellow Pages & get it to a local battery specialist. This baby caost me £72-00 & that was with discount for having Gold at the time. I'll keep you posted when deed is done. Carlo