Wednesday, February 15, 2006 - 09:33 am, by: Josh Lynch(Guruvee)
Hi Guys,
I am the proud owner of a new TT 5sp Soarer. The car is stock standard with the exception of a HKS intake and I have to say I am very impressed with the power at low revs and gear changes (coming from a previous TT Supra owner with heavy mods), but once revs hit around 4500-4700 the car seems to struggle a fair bit to hit redline.
Judging from the way it struggles I have a feeling it’s a spark related issue and may need some new plugs or possibly coil packs? I know a lot of people here recommend iridium plugs, but I’m planning on doing some mods relatively soon and think I’d like to have a go with copper for now unless there are known issues with this? Does anyone here use copper plugs and what is the best gap to use for a relatively stock engine?
Also if anyone else has experienced the same sluggishness at high revs and believes it may be something else I’d be more than appreciative for your feedback. Could it also possibly be the stock exhaust holding the car back?
Wednesday, February 15, 2006 - 09:48 am, by: Cihan Aday(Cihan)
Josh, i kind of had the same issue - where my car didnt pull as hard as other soarers at high revs. Since putting in the emanage and leaning it out a bit its definately woken up, alot more than expected. Its driving very well now.
I do believe its an ignition related issue, and ill be looking at it in detail when i get a chance.
What i have gathered so far is that lightening the fuel load where it matters is a good remedy as the cylinder isn't 'flooded' with fuel like the factory tune. Since its most likely a weak spark issue, your car probably blows black smoke at higher revs (lots of it!) like my one did. Before the emanage, changing the spark plugs and gapping them down to 0.7mm helped mine slightly but we can rule that out.
Most likely dirty coilpacks or coil related? Though, Ive never had any shuddering or missing issues..
Thursday, February 16, 2006 - 02:40 pm, by: Josh Lynch(Guruvee)
Thanks guys! I'm picking up the car on Monday and getting it registered (only just been complied), so once that's done I'll reset the ECU and change the plugs.
Cihan: Is .7mm-.8mm to cold for a stock TT? Also are you using copper or iridium?
Thursday, February 16, 2006 - 06:49 pm, by: Cihan Aday(Cihan)
Sam i reset my ECU all the time, not likely the case here.
Josh, the heat range of a plug is determined by the insulator nose length, electrode material etc. I gapped the standard bk6re plugs down to 0.7mm to stop the chance of missing under boost/high cylinder pressures. Its a '6' plug, which is standard. A heat rating of '7' means the spark plug is better at removing heat from the cylinder, subsequently reducing combustion temperatures and reducing the chance of detonation or pre-ignition.
Good luck with that Cheers, Cihan.
ps. im using NGK copper plugs, very cheap at $4 each. They work well, many forum members can vouch for that.
Saturday, February 18, 2006 - 10:08 pm, by: Josh Lynch(Guruvee)
It was a 2JZ-GTE. Sold her last year due to financial reasons, but now i'm back on the turbo scene. I'll take some pics of the Soarer after I pick her up on Monday.
Another question guys. Do manual TT Soarers have a LSD as standard like the manual Supras do or was it an option?
Supra had: Genuine trial front bar and carbon fibre bonnet 18 DTM Blitz rims GEAR coilovers exhaust Blitz intercooler hks intake AVCR TRD Strutbrace Mines ECU TRD Sports Steering wheel with airbag Full TRD Dash TRD LSD
Thursday, February 23, 2006 - 11:38 pm, by: Josh Lynch(Guruvee)
Hey guys! Turns out the only problem was the fuel in the car! It hadn't had new fuel since it arrived in the country last August. As soon as I put some BP Ultimate in the engine kicked right back and now no more boost issues
Friday, February 24, 2006 - 12:09 pm, by: Mark Paddick(Sparks)
LSD was an uncommon option in ALL Soarers. 5spd man TT is more likely to have it. Check codes on ID plate. A02B from memory is Torsen. Check the fuel filter too, it could be the cause of the problem rather than fuel itself. Fuel filter problems will often go away for a time after a tank refill.