Dash Rendar

Hi all I've been having some trouble with the AFRs on my car. The AEM AFR gauge was all over the place, sometimes rich off the scale, and sometimes lean off the scale. I was advised that I might have a faulty wideband O2 sensor, so I replaced it. Ryan then kindly remapped the car for me, and confirmed that my O2 sensor was reading accurately. Sure enough, the AFRs were reading very different from when the car had previously been mapped. Ryan and Darryl did notice that the Aeromotive FPR was a long way off what it had previously been set to. When we left it, the FPR was reading 25 on idle and the AFRs were fine. A few days later, the AFRs started reading really rich again, about 10 on idle. I checked the FPR and it still seemed to be on 25, so I didn't think much of it. But I checked the FPR again today (after having driven the car for 15 minutes) and it was reading 40 on idle!! So I adjusted it back down to 25, and sure enough, the AFRs looked fairly healthy again. Then I drove the car another 10 minutes and then checked the FPR again. This time it was reading 20! So I raised it back up to 25. So, in a nutshell, I think my AFRs are messed up because the fuel pressure wont hold. Does anyone know why my fuel pressures keep jumping around? Is it likely to be a dodgy FPR, or could it be something else? Thanks. *** Summary below, for those who dont want to read every post! *** The fuel pump, fuel filter, Aeromotive FPR, gauge, return hose in the engine bay and all vacuum hoses have now been replaced. (In fact, I've now tried three pumps and three FPRs.) I've also replaced the IACV and the fuel pulsation dampener has been bypassed. The problem remains and appears to be this: When driving for a while, the fuel pressure on the Aeromotive drops 10-15 psi, according to the gauge in the engine bay. At the same time, the Aeromotive gets very hot. I'm pressuming this could be the cause, but I guess it could be an effect. Since I've now tried three Aeromotives, I'm convinced they're working fine. That said, it's possible they're getting hotter than they should. Fuel pump wiring and voltage supply has been checked by Matt Harwood and remains constant. I've even been switched to 12V permanent, but that hasn't helped either. *** Another update! I've now got a fuel pressure gauge in the cabin, which reads rock solid fuel pressures. So the drop in pressure in the engine bay must be because it was getting hot. Mark at Phoenix assures me the car has no fuel pressure issues at all. I also bought an oil temperature gauge, and Mark has confirmed that the car goes lean when the oil temperature exceeds 70 degrees. So that's what I need to look into next!

I've had stock TT, then BPU (hybrids) TT, and now a single. The single is definitely the one to go for, so long as you can find one that's been done properly. When I went from stock TT to BPU, the power difference felt phenominal. It was like driving a completely different car. But now I've got a single, I can safely say the difference between BPU and single is even bigger than the difference between stock and BPU. It's quite incredible. From a maintenance point of view, the engine will be under more strain, as you are ultimately getting a lot more horses. On the other hand, the single turbo setup is more simple from the perspective of turbo plumbing, so there is potentially less that can go wrong.

I've just read that other stuff Chris. Good stuff, thanks. However, I've already got a second of 18s coming from Japan, as I don't like the looks of the stock wheels. I might fit some stronger roll bars (?) as I presume this might help compensate for the lack of camber control on the lower profile tyres. Other than that, fingers crossed my handling wont be much worse. I'm loving how the car handles at the moment.

It's a good question. Both cars are on Bilstein yellow shocks with stock J-Spec suspension. Both cars have the same tyres; Goodyear Eagle F1s. (In fact, the tread on the old car was much better than on my current one.) My current car does have stock TT wheels, while my old one had 18" rims. I can't honestly believe that can account for such a massive difference in handling, so I can only presume (as turbonut suggested), that the geometry was set up wrong on the old car. It was something I always considered having done, but then I just started thinking that was how Supras behaved in the wet. Now I know how wrong I was. Supras in the wet are AWESOME!

Great post, thank you!

My old Supra was rubbish in the wet. It was always sliding and the backend was all over the place. My new Supe is a whole different ball game. It feels so tight and precise through corners, in all weather. And that was before I fitted the RTLC!!

I've been wondering this myself. If you put on larger wheels, you get lower profile tyres, so the rolling radius should be unaffected, shouldn't it? I guess this results in less damping through the rubber, but is that what causes poorer handling with larger wheels? Or is it because bigger wheels weigh more? But if the wheels did weigh more, wouldn't that actually lower the CoG of the car and result in better handling? Sorry... Just curious.

Does this help? http://supra.just2good.co.uk/myBlackSingle/241107/side1.jpg http://supra.just2good.co.uk/myBlackSingle/241107/rearRight1.jpg

TrickyRicky has one for sale: http://www.mkivsupra.net/vbb/showthread.php?t=132660.

By Grabthar's Hammer, what a membership pack.

The giveaway with all these scams is the absolutely appalling grammar, spelling, and lack of punctuation. You'd think, given that they send these out to tens of thousands of people, that they might at least make an effort to make the message look credible. F*ckt4rds.

Provisionally sold.

And the price of insurance!!

More importantly, how does it sound?

It fitted fine on mine, well-aligned with the 'arch'. I agree with UK-rich... Sounds like they haven't fitted it right. Mark at Phoenix did mention to me that they fit really well, but there are a few 'tricks' that allow them to be fit nice and high with good ground clearance. The implication was that someone fitting one for the first time might not manage to get it to fit so well.

Damn Matt, this is tragic. And so soon after you had the car sorted. I've got my fingers crossed for you.

Does the name Tony ring a bell?

Thanks guys. And I'm feeling much better now. Fecking migraines hit me nearly every week!

Weds SA70TTs in "super bright chrome". Something like this: http://supra.just2good.co.uk/myBlackSingle/images/sa70tt.jpg I'm rather excited about how the car will look with those bad boys on. Anyway, it's time for me to call it a night. Migraine time.

Claywhatnow? Autogleam... It's the way forward.

Blimey, that was a long time ago! I'd totally forgotten that we met there... So many new names to me at the time. Yep, from stock, to hybrids BPU, to single. It's evolution. And from silver to black... Well that's just common sense.

I'm still struggling to teach myself that I can put my foot down in first.

Thanks matey. We'll have to hook up sometime. It's been so long! Maybe we need a Berkshire pub lunch meeting...

She did, actually! It's lovely and warm. Cough, cough, git, cough.