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Bump ....anybody? Thought I might get it drilled and tapped to a larger size, but that's proving to be much harder than it sounds!

Ok, better update this thread... I solved the problem after much head scratching. I bought a spark tester, one like this... ...and it proved to be a brilliant little gadget. Using it I was able to quickly see that the voltage output was still not great. I tried sanding the new rotors (to...

Hi guys, Does anyone have one of these lying in the pile of un-needed 1UZ parts? The thread stripped while I was trying to undo the bleed plug (or whatever it's called). :o I'm in Auckland, New Zealand if that makes any difference. Jeremy

Ignition timing is 5 degrees while cranking - is that right? It should be able to start on the cold start injector right? I plugged it back in today, and still no go? I looked down the throttle body while cranking and it has a nice spray pattern. So even though it starts and idles well on...

Will have to check compression - haven't done it yet, as I need to make an adapter to get down the spark plug tubes. Timing was one of the first things I checked. I did notice that one of the pulleys had obviously had some water in it and was feeling pretty rough -that shouldn't be enough to...

I forgot to mention - I had a look inside the ecu a while back... it all looks good, but I guess capacitors can still go bad without showing any visual signs? We don't have a CEL, just a plug with a light and a jumper than we can plug in to read codes. Would the CEL be on without the ecu having...

I'm not getting any diag codes with everything plugged in (afm, tps etc...) I tried disconnecting one coil at a time - makes a noticeable difference when attempting to start on starter spray. It still starts, but roughly. Same result with either coil disconnected, and ecu gives the...

It seems like its running on all 8 when it starts on starter spray at a normal cold idle. I don't think our multi-meter will read pulse width, but I might be able to borrow one off a friend. How could I test to see if the ecu is getting an igf back from the igniters?

We have two earth cables, one from front passenger side head to negative terminal on the battery, and the other from the driver side engine mount to the chassis. I had cleaned the passenger side one previously, but pulled both off today, cleaned and refitted. I also checked the resistance of...

Thanks for the help, I've had a bit more time over the holidays to work on this... On closer inspection the spark may be ok now? It still seems pretty small (my uneducated opinion), but it is a purple'ish colour. I checked the voltage at the coil while cranking and it's at around 10.3v, the...

Update... I've swapped out an igniter and coil, and still have the same weak spark. And the spark is the same directly from the coil, so that rules out rotor/cap/leads. What should I look at next, any hints?

Might not be helpful, but I know in ours the idle wont come down from cold idle if one (or maybe both?) of the O2 sensors aren't plugged in. We had a dodgy plug that came unplugged ...not sure if it would throw a diag code with an O2 unplugged.

Thank you both for you help so far, I've purchased some Denso #234-4000's (a universal 4-wire sensor). I found evidence to suggest it is the same sensor as #234-4211 (the replacement for a 94 LS400 4-wire) although not 100% sure on that. Haven't had a chance to install and test yet, but will...

Hi all, I'm doing lots of head scratching trying to get the thing to start again, but not having much luck - thought someone might be able to point me in the right direction... This all started on a sunday morning of a 4wd comp, it stated missing. We had a few stages still left to do, so we...

Oh, so it's just no soldering between o2 sensor and plug, but ok between plug and ecu?

Ok say the factory wiring isn't long enough to reach the sensor - what are my options? I know it isn't long enough now, but with some re-routing it may reach, or may not. ...but yep, good idea on the universal plug - and it would mean I could buy the universal version of that same sensor and...

Ok thanks guys, So I'm guessing those 4-wire Denso LS400 sensors would work? Anyone know where to get good o2 sensors at a good price in NZ? I can get those Denso sensors landed for NZD$85 each which I guess is not to bad. Also, any clues on where to get the other end (loom end) of the...

I'm looking at changing to using heated O2 sensors. We currently are using the stock single wire sensors, but as they are so far away from the nearest cylinder (custom headers) they don't seem to be working too well. So I'm told heated sensors are the way to go, but our ECU doesn't have the...

Here's the service manual info for the idle speed control and the throttle position sensor... Hope it helps.

Haven't done much on this yet, been to busy driving the thing to work on it! But I did check the timing and it seems to be around 16-17ish degrees at idle so appears not to be in limp mode. While having a quick look around, I did notice that the oxygen sensors aren't wired up. So that could be...