KevSeymour

Before spending any more £££ on this i've had a local mechanic look at it, he says i have a missfire which is probably the route cause of the problem - but couldn't tell me what was causing it (he only had the car for an hour so couldn't do too much with it).

He wants to start taking bits off and testing various things, but i'm not sure i want to start down that road, i never intended to keep the car long and wanted to spend s little as possible on it (hence buying a lexus not a jag!).

I can do plugs and leads myself, but that's another £80 in parts (Eurocarparts).

Thoughts?

Does that just explain the error codes though, or could a faulty earth cause the car to intermittently cut out?

given the different codes I would first check that your battery is good and that earthing straps are clean and bolted down tightly.

A poor earth could cause these error codes?

Kev

Did you clear the original codes after you had done the remedial caps etc .This is done by removing and replacing the dome fuse in the engine bay fuse box.

I haven't removed the fuse, but as the ECU was removed from the car to replace the caps i'm assuming i don't need to?

Kev hi ,sorry to hear you still have problems, is you engine still cutting out ? Did you find any visible problems when you replaced your ECU caps ? Strange you should now be getting a TPS code as well as the others , if you decide to replace the O2 sensors you might find these useful if yours are the flanged type .

http://www.ebay.co.uk/itm/371166774564?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

You will then be able to use the later screw in type much cheaper than the original flanged ones which might be hard to find also ,I used the Denso uni ones in mine they were about £50 each.

Good luck with your repairs ,when these engines are running right there great and well worth spending a little time and money on ,I try and spend as little of the latter as possible though .

Hi Rupert, The car hasn't cut out on me yet, but i haven't dared drive it to get stranded yet.

Are you sure about the flanged O2 sensors? The article on LexLS linked below doesn't mention it?

http://www.lexls.com/tutorials/EFI/mainoxygensensor.html

If you're sure then i'll get a pair of the flanges just in case.

Well, i finally got the capacitors changed on my ECU and have re-read the codes.

I now have a 41 to add to the 21, 28 and 63!

This car is not endearing itself to me!

Hi, sorry to bump an old thread but i'm after a kit, are they still available?

Cheers

EDIT: Kit is for a '92.

Thanks Rupert, very interesting read - this is why i always seek out an owners forum when i buy a new car! (And by 'new', i mean 22 years old with 165k on the clock!)

Hi All,

I've been having an intermittent engine cut out issue, yesterday i finally got round to reading the codes and got 3 from the engine/trans.

21 & 28 are "Main oxygen sensor signal", both banks. It's pretty clear what i have to do there - replace the main O2 sensors! (is it worth replacing the sub sensors too?)

Transmission code 63 is worrying me though because i don't understand what it means "Open or short circuit in no. 2 solenoid valve". How will this manifest as a problem? Is it serious?

Thanks in advance for the advice!

Hi Phil, and thanks for the welcome.

I got enough sevice history with the car to be happy that the car's been maintained well enough over the last 5 years, but not a lot of detail prior to that. Is there anything specific i should be looking for? I'm pretty confident this wasn't a problem the previous owners would have known about, we went on quite a lengthy test drive, it's just one of those things.

I've just found an online tutorial to read the fault codes myself so i'll be doing that in the next few days.

Cheers,

Kev

Hi All,

About 3 weeks ago i bought home a 1992 LS400, 165k on the clock and still looking good!

However.... it's just started intermittently cutting out. From cold it'll run fine, but eventually (this could be ten miles or 100 miles later) it'll start to struggle to rev, then eventually the engine will die. It mostly start doing it when i'm slowing down for something, but again this could just be lifting off or canceling the cruise @ 70mph to allow for traffic, or it could be slowing to a stop at a junction in town.

I think it's temperature related, and is definitely electrical. Water temp stays constant and there's plenty of coolant in it.

Today, it got worse, i went to Silverstone which is about 45 miles from me, up the M1 then across country - not a problem.

Then coming home at 1pm i barely got out of the gate before it started to play up again, just before the slip road to the A43. We did get it going again, i think being able to run at a constant speed in clear air keeps it happy. But it threw a properly tantrum after about 20 miles.

I eventually got home an hour ago, 7.30. Via 2 AA patrol call outs then eventually a flat bed to bring me the last stretch.

The car cooled down waiting for the 1st AA patrol, so he followed me for about 10 miles just to check it would be alright. By then the ambient temperature had dropped so i was half confident of getting home. WRONG! 2 1/2hrs in a bus stop in Dunstable later and we got lifted.

Now what do i do?

It needs plugging in for a diagnostics check, i know (i wish the AA patrols could have had the right kit to do that!), but does this sound like a common problem?

First AA patrol chap reckoned on the crank sensor?

Thanks in advance, beers to anyone who can help me sort it out without spending £££. Virtual beers if you're not local, real ones if you are!

Cheers,

Kev