johnmckellar

Thanks, Guys. Car goes in this week for replacement coils / petrol filter. Homer, will try turning off the OD & see if that makes any difference. SRK - I'm not in favour of removing the CATS since they're there for a reason though I'm open to all suggestions to get the problem sorted. Will certainly point out the O2 censors to my mechanic as well. I'll let you know what ( if anything ) happens. Cheers, JM

Thanks for all the help. Have ordered 2 replacement coils from a breaker & have arranged for new fuel filter too. My mechanic ( not Lexus! ) says that the Cat can simly be removed if it's failed tho' he doesn't think this is the cause. If it's ot the coils, I'll have Lexus look at it again but it's value ( despite my love of the car) doesn't merit throwing too much more cash at it. Keep fingers crossed. Cheers, JM

No: I had to change my all of my o2 sensors when I got the Code 25 and 31 especially for a car with so many miles. I'm also thinking it's bad ignition coil or fuel. Any hesitation during startup, e.g bouncing needle? Any chance of stopping by a Toyota Dealer or locating a Certified Toyota Master at an aftermarket store? Thanks guys. No hesitation at start up. Car runs fine & gets good acceleration but once speed drops, the judder kicks in. Will go for the cheaper options first: O2 censors, fuel filter, coils. I'm not convinced about Cat replacements especially since in UK they're not compulsory on a car this age.. Thanks again for all thoughts. Any further always welcomed. Cheers. JM

Hey, SRK my abject apologies! Didn't mean to negate the great Canadian nation especially given that all of my family live there from Toronto to Calgary. many thanks for your suggestion. Cheers, JM

Thanks Leximus - have noted your suggestion & will add it to others when I visit the mechanic. Cheers, JM

Hi Guys, Hoping that the wider US audience might help throw some light onto this problem. 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