Zeldoz Posted October 23, 2013 Share Posted October 23, 2013 (edited) My car is not very modified (currently). I have an air filter in the OEM air box's place. a HKS Decat plumbed into a HKS Hi Silent Power exhaust. If i use high boost in second gear and let it rev highly enough i hit fuel cut. Basically, what are my options to avoid this. I will be going TD04 in the next 3/4 months. I don't particularly want to spend alot as i need a short term resolution before i go TD04. So, if i was to install a manual boost controller, and effectively lower the boost to lower than the factory OEM "high" setting would this stop me from hitting cut?I'm guessing the decat is allowing the turbo to spool faster and fire out more air causing the issue. I have a boost gauage and manual boost controller landing at my door either today or tommorow i would expect and i just want to know if this would work. I also have a HKS adjustable actuator sat in my garage. But from reading up some have high .bar springs, and i'm unsure of what mine is. It's brand new and in the box but without instructions, it was a deal sweetener from when i purchased the car. I would appreciate some guidance, as i really dont want to damage the engine. - Porting the wastegate isn't an options as i will be ripping the whole CT9 setup out Christmas time. Thanks Edited October 23, 2013 by Zeldoz Quote Link to post Share on other sites
Ollieh17 Posted October 23, 2013 Share Posted October 23, 2013 every time i've experienced fuel cut its far from bogging down..its a sudden jolt that sends you forward if you don't expect it. Quote Link to post Share on other sites
Zeldoz Posted October 23, 2013 Author Share Posted October 23, 2013 every time i've experienced fuel cut its far from bogging down..its a sudden jolt that sends you forward if you don't expect it. I can feel it coming in. But i let off before i fully hit it! Quote Link to post Share on other sites
TrisK Posted October 23, 2013 Share Posted October 23, 2013 thats not fuel cut fuel cut is either on or off and its like hitting a wall. Quote Link to post Share on other sites
Ollieh17 Posted October 23, 2013 Share Posted October 23, 2013 you need to get a boost gauge dude Quote Link to post Share on other sites
Zeldoz Posted October 23, 2013 Author Share Posted October 23, 2013 thats not fuel cutfuel cut is either on or offand its like hitting a wall. It is fuel cut, i have decribed it wrong. Quote Link to post Share on other sites
Ollieh17 Posted October 23, 2013 Share Posted October 23, 2013 http://www.toyotagtturbo.com/forums/showthread.php?53375-Boost-Creep-Issues-Then-please-read-on-....-)-* as you know im having similar problems! Have a read through that dude Quote Link to post Share on other sites
Zeldoz Posted October 23, 2013 Author Share Posted October 23, 2013 http://www.toyotagtturbo.com/forums/showthread.php?53375-Boost-Creep-Issues-Then-please-read-on-....-)-* as you know im having similar problems! Have a read through that dude I have read that, but im after more of a temporary and cost effective fix as TD04 parts will be on order in December. Quote Link to post Share on other sites
Ollieh17 Posted October 23, 2013 Share Posted October 23, 2013 I don't think there is anything else you can do than whats on there tbh. Suppose you could lower the boost so much that when it creeps it doesn't creep above fuel cut 0.85bar Quote Link to post Share on other sites
Zeldoz Posted October 23, 2013 Author Share Posted October 23, 2013 (edited) I don't think there is anything else you can do than whats on there tbh. Suppose you could lower the boost so much that when it creeps it doesn't creep above fuel cut 0.85bar That's basically what i was thinking. But wanted clarification it would work.. Im not a speed freak so running the lower boost isn't an issue. For temporary measures anyway! Would it be worth fitting my HKS actuator along with the manual boost controller? Then use my Boost gauge to setup the boost? Edited October 23, 2013 by Zeldoz Quote Link to post Share on other sites
Ollieh17 Posted October 23, 2013 Share Posted October 23, 2013 id use just the HKS actuator tbh and set it up with a boost gauge, theres a guide somewhere that gives you the lengths of the actuator to achieve certain boost. Quote Link to post Share on other sites
mikey4410 Posted October 23, 2013 Share Posted October 23, 2013 i have told you alot of this man,in person,alot of it to the word.lol Quote Link to post Share on other sites
Zeldoz Posted October 23, 2013 Author Share Posted October 23, 2013 (edited) i have told you alot of this man,in person,alot of it to the word.lol We spoke in regards to TD04, but thats on hold for a month so i want safe boost on the CT9 Edited October 23, 2013 by Zeldoz Quote Link to post Share on other sites
mikey4410 Posted October 23, 2013 Share Posted October 23, 2013 Yea and i said to you about the ct9 also man.how to get an adjustable controller to stop it hitting fuel cut and how to adjust an adjustable actuator on the ct9. Quote Link to post Share on other sites
RobSR Posted October 23, 2013 Share Posted October 23, 2013 You can feel fuel cut coming before you hit it.. the options you have are either restrict the intake, or the exhaust. So put the airbox back on, that may help, or restrict your filter. Or, restrict the exhaust side, so put the cat back on, or fit a restricter ring in the exhaust. A manual or any kind of boost controller cant lower boost from what it naturally boosts too. If its boosting to .9bar on its own, setting an EBC at 0.7 wont hold it back. Quote Link to post Share on other sites
Zeldoz Posted October 23, 2013 Author Share Posted October 23, 2013 You can feel fuel cut coming before you hit it.. the options you have are either restrict the intake, or the exhaust. So put the airbox back on, that may help, or restrict your filter. Or, restrict the exhaust side, so put the cat back on, or fit a restricter ring in the exhaust. A manual or any kind of boost controller cant lower boost from what it naturally boosts too. If its boosting to .9bar on its own, setting an EBC at 0.7 wont hold it back. What if i was to put an adjustable HKS actuator on, set the boost to say 0.7 bar and then with the manual controller set that to 0.7 if it creeps it may be under fuel cut. If it creeps over, lower the boost more? Quote Link to post Share on other sites
Phil Posted October 23, 2013 Share Posted October 23, 2013 Or you could get yourself a FPR and FCC remove the fuel cut and add some fuel, but you'd need to know somebody with a wideband to get it set up. but a ct9 @1bar with fuelling setup goes dead on, crude but good. i happen to being selling both parts you would need for this setup, and if you were in ireland i could get your fuelling sorted too. but your in east sussex lol Phil Quote Link to post Share on other sites
Ollieh17 Posted October 23, 2013 Share Posted October 23, 2013 I still creep at 0.7bar, but only in 4th and 5th at high revs. if you say you are not a speed demon you should be fine Quote Link to post Share on other sites
RobSR Posted October 23, 2013 Share Posted October 23, 2013 (edited) What if i was to put an adjustable HKS actuator on, set the boost to say 0.7 bar and then with the manual controller set that to 0.7 if it creeps it may be under fuel cut. If it creeps over, lower the boost more? Its not that simple. its due to the size of the wastegate in the turbo housing. its not large enough to flow the amount of air your putting in, so again that wont make alot of difference. The other thing you can do is take the turbo apart and port the wastegate slightly. The only way it could help is if your original actuator isnt opening the wastegate enough, but ive never seen that happen. Its usually the other way round. Edited October 23, 2013 by RobSR Quote Link to post Share on other sites
Zeldoz Posted October 23, 2013 Author Share Posted October 23, 2013 Hmm.. Crappy situation on CT9 i must admit.... Quote Link to post Share on other sites
RobSR Posted October 23, 2013 Share Posted October 23, 2013 (edited) Yup there not brilliant... if your going td04 soon, put the standard airbox back on for the meantime and see if that helps Edited October 23, 2013 by RobSR Quote Link to post Share on other sites
Ollieh17 Posted October 23, 2013 Share Posted October 23, 2013 drive slow, save fuel, no fuel cut= more money for TD04 winwin thats my plan Quote Link to post Share on other sites
Zeldoz Posted October 23, 2013 Author Share Posted October 23, 2013 Yup there not brilliant... if your going td04 soon, put the standard airbox back on for the meantime and see if that helps I'll give this a go this evening. - I'll see how it goes! Quote Link to post Share on other sites
Jamie_VF22 Posted October 24, 2013 Share Posted October 24, 2013 (edited) Fuel Cut is = 0.85BarJust run 0.7 bar until you can afford a way of controlling boost better. Edited October 24, 2013 by Jamie_VF22 Quote Link to post Share on other sites
RobSR Posted October 24, 2013 Share Posted October 24, 2013 ^Fuel cut varies on all car's its controlled when the ecu sees a set voltage from the map. Some cut before some cut after. Quote Link to post Share on other sites
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