harryww89

TDi were fantastic, very professional service. Likewise, I lack the trust of people working on my cars apart from myself, too many cowboys out there. Thanks for the comments folks, it's like going into warp speed when it comes on boost

Just picked up my Supra from TDI of Thurrock. After I finally resolved my misfire issue, which turned out to be two dodgy fuel pumps, thought it'd be best to get it checked over. They ran a full engine check and cylinder leakage test, results all came out between 8% & 14% which is great. Car would still stutter in high boost. TDI fully remapped the car, and have done a great job, refined cold idle perfectly and the power has been properly unleashed. The HKS EVC 4 needs replacing as it only works in high mode and has a fixed duty cycle, when this is replaced and the boost can hold at high rpm, we should see over 600 @ the hubs! Eitherway, this is my track car, not a drag car. Info and graphs below. Grey line - As it was when I took it in at 0.9bar Blue line - Remapped at 0.9bar Red Line - Remapped at 1.6bar Engine Type - 3.0L Single Turbo Engine Spec - HKS Cams & Pulleys Turbo - T04Z Intercooler - Trust 4" Fuel Used - V-power Injectors - Sard or Denso 800cc+ Fuel pump- single Walbro 485 Exhaust - HKS Ti 4" System Transmission - V161 ECU - FCON VPro & HKS EVC 4 Mapped By - Torque Developments International Dyno Used - Rototest VPA-R chassis dynamometer system Power figure - 583bhp @ the hubs on Vpower (670bhp @ Fly as a crude estimate) Torque figure - 510ftlb @ the hubs on Vpower (586ftlb @ Fly as a crude estimate) Boost Pressure - 1.6 bar on Vpower Cheers, Harry

Hi Chaps, For anybody who's interested, it turned out to be the in tank pump which was the failure, it was not even a Supra pump in tank, Turned out to be a Skyline pump in there:blink:! I re-plummed the system to run on the Skyline pump, and the car wouldn't start due to extremely poor fuel pressure. I believe the engine is still in one piece thanks to the Aeromotive and swirl pot and pressure gradually losing instead of completely shutting off. Anyway, new Walbro 450lph fitted, car started first time after being stood for 6 weeks and runs well, although I have yet to take it on a long run, off to Torque Developments Next week for some tinkering so we will see how we go!

It's ridiculously loud in the back Paul - Truly deafening. Chris, thanks for your input, will drop you an email.

Hi Paul, Would this be an Intank pump? Here is a picutre of the set up - Ideally i'd like to keep the same fittings and swirl pot system - Just replace the A1000 With something else, whether this be 2 external pumps or another large single. Cheers,

Hi All, I have finally found the problem with misfire - All of the symptoms came together last night as I was setting off to leave for the Nurburgring and ended up with a 5 hour limp to drive 60miles back home. Basically, the issue with the vehicle only misifiring when 'warm' was down to the fuel pump. There is an external Aeromotive A1000 fuel pump in the boot, to which yesterday, I believe the heat from the car being sat in the sun all day finally sent it over the edge, The fuel pump would not prime, only upon cooling the pump down with water/ice pack would the car start and run very poorly, reading up on this thing, I believe the adhesive on the magnets on the pump can fail? Eitherway, I believe this was the source of the issue - I'm unsure now as to what replacement to go for? Another A1000 or amend the set up to run twin bosch 044's? Are there any other fuel pumps on the Market that can support 700bhp that people would recommend? Many thanks. Harry

Surprise surprise, coilpack clips made no difference. Going to resort to taking it down to TDI international.

Hi, I'm actually heading to Manchester on Saturday, I just wasn't intending to take the Supra. Hoping the coilpack clips are here tonight - Should these not fix the problem, I may take you up on the offer, i'll keep you posted!

I took the Supra out last night for a few pulls and took note of the detail. Length of running now doesn't effect the problem - Straight away from initial running the hesitation is present above 5000rpm (Obviously warmed up to minimal operating temps). Engine Management/Check engine light comes on as soon as the affected load site is reached. Fuel Pressure is a healthy 3.5bar throughout WOT above 5000rpm - The needle does seem to jump bounce around from 3.4-3.6 when in the effected area. Again Oil pressure is a healthy 7bar on WOT. I'm struggling to find an igniter at the minute. As a precaution, I have bought a new set of coilpack Clips - The currents all look in good condition, but it's just another factor to cross of the list, these should arrive today and I'll install them this evening and try again.

Hi Chaps, Does anybody know where you can buy these from apart from Toyota @ £492 I'm trying to do some fault finding on a misfire on the Supra and this is one of the last things to check before resorting to fuelling/mapping. Is there anybody in the Derby Area that would be willing to let me try theirs out on my car to see if it resolves my misfire? Tech thread here: http://www.mkivsupra.net/vbb/showthread.php?323714-Misfire-on-boost-over-5krpm-Single-Turbo-Setup Many thanks Harry

All in good condition Ian and in one piece with no broken ends. Spoken to TDI in Essex - Advised to have a look at the igniter pack, as somebody may of over compensated on the spark dwell on the map to try and hide a misfire which may of come from the coilpacks breaking down. If this solves the issue, then we know it could well be the mapping.

Is there anybody in Derby who would be willing to let me try out their igniter pack on my vehicle?

Hi Ricky, No wideband unfortunately - There's an EGT gauge in the car but that is not hooked up. There is a bung available at the top of the downpipe right after the turbine exhaust housing that looks at though it could cater for a wideband. I think as you say the car may be overfuelling at high RPM. Only problem with having the MAP checked is it's a HKS FCON V Pro on the car, which not many people map I believe? TDI & Abbey at a guess? Proving to be a bit of a PITA.

Right guys, I've fitted all new ignition components apart from the igniter pack, the misfire is still present. During the time the vehicle has been off the road, I have rebuilt all of the turbo to inlet pipework with new hoses & clamps, so I can be certain there are no air leaks. So Ignition and Air I believe are okay, which just leaves fuelling. Symptoms; Vehicle when up to operating temperature misfires/hesitates after 5k RPM on WOT - Boost appears to make a small difference to symptoms, I have ran it at 1bar - 1.7bar and the issue is still the same, albeit predominantly worse on the higher boost setting, similar feeling to fuel cut on high RPM High Boost and you cannot rev through this hesitation. As soon as you hit the load site whereby by the hesitation begins, the check engine light comes on and stays on, then dissapears upon returning back to normal load conditions. I am due to be going to Nurburgring on August 12th, so need to get this resolved by then. Are there any reputable dyno's within the Midlands area with a good set of facilities. I am going to try and obtain the map from the HKS FCON and review its settings. Many thanks,

Have one on my Supra - Loud is not the word! Sounds absolutely ballistic!!

Will drop them an email, thanks buddy!

Hi Chaps, As per title really, the front brake pads in the Greddy 6 piston calipers appear to be getting quite low. Could anybody please advise who/where sells replacements that fit these calipers? Ideally after some pads that have plenty of bite on track when up to temperature? Any help would be great, Harry

Cheers Nic, Managed to find some for $450 delivered to the UK - Will get them ordered next week!

That was my original idea Chris, unsure of any reputable garages with a set of rollers in the Midlands area....May give my old lecturer a bell see if he'd let me use my old Uni RR. Next best shout is to get it booked into TDI down south.

Think you're all correct chaps, Just been out to do some more fault finding - reviewed the settings on the boost controller, high was set at 1.7bar , I've gone on the low settings and turned it down to 1bar - did a few pulls, spiked and held 1.1/1.2bar to well into the redline with no misfiring - Pulled like an absolute train! So I think we've sussed it to be the coilpacks degrading on high boost! Cheers for the help guys! Will buy some new ones when I get paid and let you know the outcome

I think that may be the best option - Will buy new to prevent buying twice. Where would be the best place to buy them? I've looked on Whiftbitz but they're £90 each, found some here http://www.daytonagblimited.co.uk/ignition-coils/239-genuine-toyota-supra-ignition-coils-90919-02205-.html for £62... Unsure if they are a reliable source or not though?

Just taken it out this morning in the dry for a good 20mile run while it was very quiet, I'm still baffled, I took it through 2nd/3rd/4th on Full boost; 1st gear - No issue 2nd Gear - Not really an issue 3rd Gear - Tended to be mis at around 5800rpm + 4th Gear - Started to mis around 6000rpm + So I believe the issue is load dependant and for how long it's climbing through the rev range, which to me, may point towards ignition breakdown? The misfire is very noticable, as you hit the RPM thats effected, it ends up backfiring through the load area - Would the ECU be pulling the ignition to prevent damage? Are HKS FCON's up to that? Surely if it was only one coilpack that was the issue - Only one/two spark plugs would be badly fouled? Unsure which action to take next - Dyno or Coilpacks...

Thanks for the advise Lee, I've just taken it out, she was low on fuel so i've just put £30 Vpower in at a different Shell garage. Let the fuel settle/mix for a fuel miles and tried giving it some beans, asking for trouble in this weather with this power though, need balls of steel and hands of Senna! From what I can gather, I did manage to get a bit of a run in 2/3/4th even though it was spinning up drastically, but the misfire seems to have dissapeared from the run an hour ago? Really need to get it out in the Dry to be sure. Big Supes - It's n not at the exact same RPM every time, it's very hit and miss! When she has misfired though, or you hit the rev limiter (8000rpm in this) The engine management light comes on, then flicks off again. However, a lot of high power supra videos i've seen tend to do the same thing? Again, any help would be great, but I think a run in the dry is needed to confirm if it was a shit batch of fuel!

Chaps, Bought the Supra last Saturday, it ran absolutely fine when I first got it apart from the boost hose popping off a couple of times. Last Sunday, took it for a drive in the evening and it started to misfire on full load over 5krpm through 2nd/3rd/4th - Quite bad spluttering and you could not push through the misfire. I whipped the plugs out at the start of the week, and they were all very badly dry fouled - Plugs were Denso IK22's, which I believe would be too hot of a heat range for setup specification. Therefore, I've bought some IK27's, i've just fitted them and taken the car for a Run (A bit hairy in the rain) - However, the problem still lies. I'm really stumped as I can't understand how when I first collected the car it ran superb, and within the space of 24hours, it's throwing a major wobbler! The only change I can currently think of was putting £20 of Vpower in, as to which, I have not yet added anymore - Nearly on empty so will be refilled and I will try another fuel station. I've looked at all of the coilpacks and they 'look' in good condition, likewise with the coilpack clips - They are not brittle of broken and wiring looks secure. The car spec is as follows; T04Z @ 1.7bar HKS CAMS & PULLEYS HKS FCON V pro & HKS EVC Aeromotive fuel system & fpr - Denso 840cc Injectors by the looks of it Usual other bits like Trust intercooler, HKS Ti exhaust etc... Is there a way to check individual coilpack plugs & clips for issues? Could it be something else? Pics of the removed IK22's Many thanks for any help, Harry

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