Polo Posted October 31, 2011 Share Posted October 31, 2011 Hi guys, Wondering if any of you know of this problem? I have a 2jz GTE 6spd Jap spec ecu and loom fitted to my car, running a HKS f-con vpro gold! Now its mapped to just over 600hp but im getting a premiture rev cut about 6200rpm, some times sooner and under less load it will rev higher. This is not some thing that has just come about, its been there since mapping, i have tried crank shaft sensors and cam sensors to no joy. Also my friend hase the exact same problem on a 1jz vvti engine, with the same ecu!!! Yet we know people running the same ECU on the JZ engines with out this issue!! The only differance we can see is the others we know do not have the extra cruise control throttle. (i have removed mine and using a 80mm throttle) So any one know of this, any way of fixing it?? other than fitting syvecs? lol Quote Link to comment Share on other sites More sharing options...
Bailey. Posted October 31, 2011 Share Posted October 31, 2011 Is the f con bringing up any flash codes??(red light flashing) Quote Link to comment Share on other sites More sharing options...
Polo Posted October 31, 2011 Author Share Posted October 31, 2011 Is the f con bringing up any flash codes??(red light flashing) While its doing the fault or just when switched on?? Quote Link to comment Share on other sites More sharing options...
Bailey. Posted October 31, 2011 Share Posted October 31, 2011 Iirc it holds the fault until the ignition is switched off. Quote Link to comment Share on other sites More sharing options...
Nic Posted October 31, 2011 Share Posted October 31, 2011 Who did the mapping? If it's been like that since you had it mapped then it could just be the rev cut is set low, I'd get the car back to them and get the map checked. I use to run an HKS V Pro Gold with the rev limit raised to 7200rpm. Quote Link to comment Share on other sites More sharing options...
Polo Posted October 31, 2011 Author Share Posted October 31, 2011 Who did the mapping? If it's been like that since you had it mapped then it could just be the rev cut is set low, I'd get the car back to them and get the map checked. I use to run an HKS V Pro Gold with the rev limit raised to 7200rpm. It was mapped by Greg at protuner, both cars wer, aswell as the ones we know which do work. We have both been back to try differant fixes. The rev limmit on both cars are set to 7krpm. Some times in 1st and 2nd gear it will hit the 7k limmit, which sounds like a machine gun, the premiture cut is like half the speed and more of a bang bang bang. Quote Link to comment Share on other sites More sharing options...
Nic Posted October 31, 2011 Share Posted October 31, 2011 which sounds like a machine gun, the premiture cut is like half the speed and more of a bang bang bang. From your description it sounds like a misfire rather than rev cut, ie. in lower gears it is reaching the 7K rpm limit but in higher gears when the engine is under more load and probably making more boost it is missing. Have you checked the plugs, coil packs and coil pack connectors? Quote Link to comment Share on other sites More sharing options...
Polo Posted October 31, 2011 Author Share Posted October 31, 2011 From your description it sounds like a misfire rather than rev cut, ie. in lower gears it is reaching the 7K rpm limit but in higher gears when the engine is under more load and probably making more boost it is missing. Have you checked the plugs, coil packs and coil pack connectors? Brand new coil pack electrical plugs, coil packs and plugs fitted before mapping. Compression level accross the board. Its defo not a miss, iv been trying to find a vid to show but i cant lol. Its like antilag haha Quote Link to comment Share on other sites More sharing options...
Polo Posted October 31, 2011 Author Share Posted October 31, 2011 This is the only vid i can find, its a bit crap at about 45 secs, it starts with the machine gun limit for a sec then does the bang bang bang limit. Quote Link to comment Share on other sites More sharing options...
mark newman Posted October 31, 2011 Share Posted October 31, 2011 its only boost cut ,lower the boost untill you get the mapper to change the map. Quote Link to comment Share on other sites More sharing options...
Polo Posted October 31, 2011 Author Share Posted October 31, 2011 How can it be boost cut?? :s confused. It does it on low boost 1.2bar and high boost 1.6bar. My team mates what ever low or high he runs also. I see some guy in china had the same problem, said he changed the ecu in the end, I'm thinking maybe it's to do with the switches in side the ecu. Quote Link to comment Share on other sites More sharing options...
mark newman Posted October 31, 2011 Share Posted October 31, 2011 I had the same , Ryan sorted it in about 3 min's Quote Link to comment Share on other sites More sharing options...
Polo Posted October 31, 2011 Author Share Posted October 31, 2011 If you had the same, why did you say it was boost cut? or is that just what ryan told you it was? Il give him a buz in the morning. If it was boost cut it would cut at peak boost which is about 4krpm, boost doesnt increase with rpm once peak is hit, well if it does, some thing is wrong lol Quote Link to comment Share on other sites More sharing options...
mark newman Posted October 31, 2011 Share Posted October 31, 2011 Differnt air tempture from day to day can cause boost cut . Ryan will sort it no probs. Quote Link to comment Share on other sites More sharing options...
Polo Posted October 31, 2011 Author Share Posted October 31, 2011 Differnt air tempture from day to day can cause boost cut . Ryan will sort it no probs. It was doing it on the dyno the day it was mapped, it was the reason we stopped the mapping session so its not that, thoght id give the HKS one last go, or il go Syvecs. Quote Link to comment Share on other sites More sharing options...
Polo Posted October 31, 2011 Author Share Posted October 31, 2011 I had the same , Ryan sorted it in about 3 min's Was it with the HKS ecu or some thing else? You just had this probelm in genral or was it exactly the same? Quote Link to comment Share on other sites More sharing options...
mark newman Posted October 31, 2011 Share Posted October 31, 2011 Was it with the HKS ecu or some thing else? You just had this probelm in genral or was it exactly the same? same as HKS F/COM PRO GOLD THIS IS A REALLY NICE BIT OF KIT. Quote Link to comment Share on other sites More sharing options...
Ryan.G Posted November 2, 2011 Share Posted November 2, 2011 It was down to the main close time compensation in ignition trims. It needed to be modified to suit the old coils Quote Link to comment Share on other sites More sharing options...
Polo Posted November 2, 2011 Author Share Posted November 2, 2011 (edited) Cheers buddy but just spoke to Greg and he's tried that I'm just going to get the car done and leave it with him until it's sorted, ever times it's been there it's been till 2-4am rushing about to get it on track. Lol Edited November 2, 2011 by Polo (see edit history) Quote Link to comment Share on other sites More sharing options...
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