and1c

bargain!

New pulley time! Not cheap either unfortunately..

Sorted the logging out... it does have live logging, just needs laptop hooked up as opposed to being able to store it onboard http://www.filedropper.com/livelog2 Misfire seems to be worse with the new coil wiring etc so I am definately thinking coils more than anything else. Whenever I put my toe down a bit, it would get to (4500rpm ish) or even less and then start missing. 'map limit reached' was the message on the Link software screen. I cant decipher much useful from the logs to be honest, anyone see anything obvious that I missed? 4340-4348 it is overboosting and hitting the map limit. This is clearly causing the ECU to cut power. Just got to find out the cause now!.

so this then.. http://www.turboford.org/faq/images/bcs-conn.jpg - - - Updated - - - what make of boost controller is it?

Like this? http://www.rx7club.com/attachments/3rd-generation-specific-1993-2002-16/445255d1319116342-electronic-boost-controller-comparison-chart-ewg_ebc.jpg

What photos...

I rate Footman James highly. Had a kit car insured with them for quite a few years for cheap as chips. So they do modified cars as well then? I need to get a better deal on mine next time around.

Link have been really helpful, considering the ecu is not in their current line up. here is their reply, it doesnt really tell me anything I didn't know already but it's good to know and got me researching on dwell time for the coils. Which is tricky as they are'nt the stock denso ones but assuming they are not faulty (and them being at fault is a strong possibility) I have sent them my map but the dwell settings are as recommended in other cases involving 2jz /standalone/stock coils/igniter., about 2ms at 14v/15v. (in fact they recommend 2.4ms) http://forums.linkecu.com/index.php?/topic/1496-2jzgte-vvti-ignition-break-up/ Based on the current situation I think I am going to try the loan OEM coils and if it is in any way 'better' (eg more boost without spark blowout) than it is now I will buy a brand new set of Densos and go from there. Maybe replace the spark ignitor, or the other option I am looking at is an LS2 coil conversion. Will update!

Was that using OEM Denso coils as well Wez? Had a response back from Link

Yes, that sounds like a plan.. Will do so and update

Yes indeed. Just been looking through the ignition tables and dwell settings. It is set up as wasted spark, 3 pairs. Meaning there should be an ignition booster...? somewhere! But I have fitted a new engine and had the entire engine loom out to redo connectors and when I did the engine and I have seen nada, zip, nothing!! - - - Updated - - - The problem is becoming clearer lol Is it worth checking the voltage at the coil positive with the engine running? Realistically I doubt it will tell me squat because the car runs sweetly until 5k rpm / higher boost

Yes mate, I'm 99% sure. The G3 LEM is the cheaper version of the G3 (G3 does full sequentia injection I think?) I've just checked inside it and it says G3 LEM on the PCB, the case is the same as the G3 though..!!! That means that I must have an ignition amplifier somewere.....??? right?!! edited// Apparently the G3 is the Same as the G3 LEM according to Link. One and the same ECU,

I have not had the car running properly above 5k rpm , no! I am assuming it used to because Chris Wilson did quite a lot of work on the car before I bought it and said it ran sweetly, but I don't know if he had tested it to the extent I have. Since then it has been rebuilt pretty much. I wonder if there is already a 'faulty' ignition amp on the car? I cant see how it would dyno at nearly 500 rwhp with this issue, it is not possible. Will do some more hunting in the footwell and see if there is one that may be faulty? Cheers Wez

Cheers, borrowing a set is a good plan if anyone happens to have a spare set for sale!? or loan!£! Otherwise I will do further research on the options for coil packs

Anyone know if these are just black super sparks? http://www.garagewhifbitz.co.uk/toyota/supra/ignition-parts/garage-whifbitz-568.html

Thanks Chris!!! Did some more searching after you said they were notorious and found this http://www.mkivsupra.net/vbb/showthread.php?313009-missfire-under-boost-faulty-coil-pack&highlight=super+spark+coil it seems Lee has had a lot of issues with them Anyone got any idea on the cost of a new set from SRD? Thanks again mate, I pray that this solves it

Although one thing I don't like about them is the little springs that go on to the plug, they dont line up straight in the rubber sleeve, and nor do they actually loop over the top of the plug as I tried it when they were removed earlier!!

Really?? Hmm, I dont know for sure!! but they look brand new, no cracks or heat damage, and they cost the last owner £400! I was reading up on them and found only good stuff?? You think it may be them>?!!

I think if I pay to update the firmware to the Link G4 then I can do logging... may be worth exploring but then the map needs 'porting' to the G4, though I guess this is manual replacement of all values that were present in the old setup Oh and I compression tested it just to be sure and they are all 180psi give or take a couple of psi

It's a Link G3 LEM mate, I don't believe it does log recording, only logging while you have a laptop hooked up..! And it's hard enough reading the gauges at wot. It is full standalone, running the 2j auto ECU only for auto box functions. I thought you didn't have to gap them either!! I rang Norris motorsport who are the nearest 'quality' place to me to see if he could take a look, (he wouldnt! as they do EVO or cosworth not 2jz..) But he was saying what are the plugs gapped at? I said they were not gappable and were preset Iridiums I thought. He advised me that they gap them all the time for higher hp turbo motors, and they ARE totally gappable. So I duly removed them this evening, gapped them very very carefully and refitted. It made naff all difference sadly!

ok guys. Got back on to the car now the weather has picked up a bit. Brief spec - Titan stage 2 auto, 3800 hi stall refreshed engine with all ARP hardware Link ECU PT 6768 dbb turbo 800 cc sard injectors Dynoed at 495 rwhp Dyno Dynamics previous to my ownership So I have been through the car pretty much completely and it has wanted for nothing... All usual things have been attended to (in addition to many others lol) and it runs sweetly except for if I get on the gas hard, then I get random hesitations/misfire possibly. It seems to be at 1 bar boost near enough. It doesnt go much above this due to the above and I dont keep pressing on. What I have done, new NGK BKR8EIX Gapped to .024 thou, Nero at Titan recommends 0.025 as good for the vast majority of single supras, some running much higher boost. I have redone all of the coil pack wiring as far back as possible , with new wiring and new connectors. It has super spark coil packs that are nearly new and are not the problem. I have boost pressure tested the system to 18psi (that's what the dump valve opens at) I am kind of out of ideas and it is starting to p*ss me off!! If I go steady on the throttle it goes like a rocket (slow increase) but at some point usually above 5000 rpm it will stutter. AFR gauge fitted, it's hard to tell exactly as it doesn't always do it (depends on driving style) but seems to be about 12:1, although I glanced and saw it at 10.3 under wot. Could the standalone be at fault? It could be the map, I have no way to be certain apart from it was running fine for the last owner apparently and it had no spec changes since the dyno chart. I wonder if it is worth redoing the coil wiring all the way back through the loom. Could be another waste of time though!! If I had a good specialist locally I would undoubtedly take it there as I dont have time for it at present. Anyone got any ideas on where to go next? thanks ps/ Could it be trac control related?

edited,

The one in the netherlands and not the USA based scam website? https://suprasport.nl/Toyota/Supra-JZA80-MK4/V160-6-speed-Getrag-parts I had heard good things from a couple of people who had bought parts from them, and I have also with no issue. I have no idea on their gearbox skills though.