nihontoman Posted May 22, 2015 Share Posted May 22, 2015 So, I recently imported a Single Turbo Supra RZ from Japan and While the car Is excellent and really exceeded my expectations in just about everything, it came with some problems that needed some sorting out. Here I'll discus one of the most pressing issues I've had with it - Leaking, or should I say - spraying all over the place - fuel hoses that are connected with additional injectors that apparently just dump the fuel into the intake pipe (prior to throttle) for reasons unbeknownst to me... Problem was discovered after about 15 minutes, after I took the car out from the port terminal and fueled up at a nearby station. I decided to "pop da hood" to check what was going on and also to attach license plates. Glad I did that Because What I discovered was that the Fuel hose connected to the uppermost injector connected to the intake pipe was spraying fuel on everything. I really panicked. imagined my car bursting into flames and what not. Tried turning the ignition off - no dice, the turbo timer did it's job and kept the engine running along with the fuel pump. After about 3 seconds filled with dismay, I just put the handbrake on, put the car into gear and dumped the clutch. the engine stopped, but the fuel was still leaking for about a minute afterwards... I had a water bottle and juts tried to wash down the places in hopes it would make it that bit harder for the petrol to ignite on it's own just before it stopped, a passerby admiring my supra approached and seeing the situation, suggested help in replacing the damaged hose. Of course I was VERY glad. He turned out to be a mechanic, went somewhere and came back with a car filled with tools to help me. he replaced it but the fix was temporary. I was fearing the two left would also give up. Today I solved the problem - my friend, which you could say is one of the best mechanics here in my country (even though he's a lawyer by profession and isn't a professional mechanic) helped me with replacing the hoses. he had some leftover Gates branded fuel hose (from a Frankenstein Suzuki Vitara with a Gold 1.9TD engine swap), that we cut up in pieces (approx. 3 inches long) and he put them on in place of the existing (and probably already damaged) steel sheathed hoses. here's the pics I got: ^ Here You can see the hoses already changed to new Gates branded ones. the steel sheathed one is on top. this is after tightening them in place This got me thinking How many hoses would need Changing though and I'm kinda worried. Please feel free to ask anything or weigh in on the subject. Thanks Quote Link to comment Share on other sites More sharing options...
Wez Posted May 22, 2015 Share Posted May 22, 2015 Crikey thats an old way of doing things. You are far better off replacing the stock injectors with suitable fuel management, ive not seen a setup like that before using three, the old ones use to use two injectors just before the throttle, only issue with this setup is you cannot evenly distribute the fuel between the cylinders, like I said, its an old bodge really. What the full spec on the car? Quote Link to comment Share on other sites More sharing options...
nihontoman Posted May 23, 2015 Author Share Posted May 23, 2015 The thing is, main injectors also are aftermarket, but don't know what spec and/or brand... They are violet/red in color and don't look like stock ones Hard to say full spec, but it's HKS T04S (.84 ar) full exhaust, F con V Pro with all it's additional little controlers and such, Prostart Launch constrol (gotta love the flames ) aftermarket intercooler and oil coolers, multi plate clutch, Upgraded LSD, HKS coilovers (I think the oldschool hypermax RS), and some bits and bobs. Funny thing is, it came with some girly slippers, beauty saloon coupons and a lipstick which makes me believe it is a girls car :/ The power delivery isn't what you'd call smooth. It's dead u till 4000 rpm, well not dead but the turbo spools at this rpm and then all hell breaks loose the tire ans suspension setup (255 yokohama advan neova ad08 up front and stretched 265 yokohama eco somethings on the back, with VERY Stiff rear shocks) suggests that they might have used it for drifting, though I can't imagine drifting with this kinda sudden power delivery... Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted May 23, 2015 Share Posted May 23, 2015 As above, Id get rid of all that stuff, get new injectors in the fuel rail and get it mapped. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted May 23, 2015 Share Posted May 23, 2015 Jesus, what a mess, strip that &%@~# off and bin it, that's early seventies technology, badly executed and the fuel distribution will be horrendous. The plenum is designed to flow dry air equally, not a (very...) semi homogeneous air fuel mix. Take photos first please, they would look good in my house of horrors collection! The stuff you found in the car means nothing these days, just look what people are voting on in Ireland today, and unbelievably it seems the pundits say the results may be close... Quote Link to comment Share on other sites More sharing options...
nihontoman Posted May 23, 2015 Author Share Posted May 23, 2015 As above, Id get rid of all that stuff, get new injectors in the fuel rail and get it mapped. How much would that cost? Jesus, what a mess, strip that &%@~# off and bin it, that's early seventies technology, badly executed and the fuel distribution will be horrendous. The plenum is designed to flow dry air equally, not a (very...) semi homogeneous air fuel mix. Take photos first please, they would look good in my house of horrors collection! The stuff you found in the car means nothing these days, just look what people are voting on in Ireland today, and unbelievably it seems the pundits say the results may be close... Is it really that bad ? dunno guys, it kinda works and what could go wrong? just looking for some scenarios Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted May 23, 2015 Share Posted May 23, 2015 Yes, it is REALLY that bad. What ECU is running that? I would bin all that junk, and as others have said, get some correctly sized, branded injectors for the desired power, and a decent ECU like a Motec or a Syvecs. Even a LINK ECU if the budget is tight. Das svedanya! Quote Link to comment Share on other sites More sharing options...
nihontoman Posted May 23, 2015 Author Share Posted May 23, 2015 Yes, it is REALLY that bad. What ECU is running that? I would bin all that junk, and as others have said, get some correctly sized, branded injectors for the desired power, and a decent ECU like a Motec or a Syvecs. Even a LINK ECU if the budget is tight. Das svedanya! It's HKS Fcon V pro. also you got the goodbye part wrong - I'm not Russian Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted May 23, 2015 Share Posted May 23, 2015 The FCON should be able to control bigger injectors without recourse to those add ons in the inlet tract. Shouldn't cost more than bigger injectors and a remap. Without measuring Lambda in each cylinder individually you will never know if some are mad rich and some are mad weak, with an overall mixture that looks OK. I tend to use that expression to anyone east of Felixstowe Quote Link to comment Share on other sites More sharing options...
nihontoman Posted May 23, 2015 Author Share Posted May 23, 2015 The FCON should be able to control bigger injectors without recourse to those add ons in the inlet tract. Shouldn't cost more than bigger injectors and a remap. Without measuring Lambda in each cylinder individually you will never know if some are mad rich and some are mad weak, with an overall mixture that looks OK. I tend to use that expression to anyone east of Felixstowe ^ Haha, Fair enough Actually I was planning on getting the car to tuner here and sorting everything out but didn't really think additional injectors would be a bad thing. Live and learn I guess Also I already mentioned that if I'm not mistaken, the main injectors should also be aftermarket. In any case, I will have the car checked with people who know what they are doing and go from there. Thanks for the advise, highly appreciated Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted May 23, 2015 Share Posted May 23, 2015 It's down to where they are, if the "normal" injectors are of the right size for the engine power level, they won't be required. The issue is one of fuel distribution. the intake plenum and manifold is solely designed to flow *AIR* equally to each cylinder. An air and fuel *MIX* from those injectors will definitely *NOT* be distributed evenly. Some cylinders will definitely get more fuel / air than others, which is potentially VERY bad. The stock injectors spray straight into the ports, which is what you need for even fuel distribution. Hope that helps, should be a pretty easy and cheap fix. Quote Link to comment Share on other sites More sharing options...
nihontoman Posted May 23, 2015 Author Share Posted May 23, 2015 Thanks once again I get the general idea of why it's a bad thing. Will take it down to the tuner and see what readinga he'll get. Quote Link to comment Share on other sites More sharing options...
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