Saturday, June 16, 2012 - 12:06 am, by: Cameron Marshall(5ltbetr)
Ive been trying to work out his nagging isue for quite some time now and i was hoping that someone could shed some light on the situation for me to try
Mods are
Fmic 3.5" dump back exhaust Highflowed steelwheeled turbos Boost controller 100mm thickfmic HKS fuel cut defender. Super spark coilpacks (plugs damaged but terminals secured tightly) Brand new irridiums gaped to .8
Now the problem is.. I was half way through a 500km drive and i booted it from a standstil. And as soon as it hit 15 psi. It misses very similar like the auto makes it do during gear changes..
I pulled over and checked everything and cant find anythig wrong... Besides.. (fun part) it has done this twice now.. Comes up on start up in japanese charicters electrical system error.. The car hunts violently for idle... And the boost guage is not illuminated.. Possibly not getting full viltage?? if u give it a big rev the guage lights up. Error goes away and car runs perfectly..
I have turned the boost fown to 14psi and all the sympyoms have gone...
I have cleared the ecu codes... Driven the car. And recieved no eng related error codes from the single run when i tried 19 psi again...
Thw fcd is def working as if u turn it. The idle changes quickly, i havnt touched it since dyno run.
Could this be the fuel pump computer not givig the pump 12v??
Please help me! i live in the outback and theres no other 1j's within 300 kms lol ..
Saturday, June 16, 2012 - 07:04 am, by: Daniel Clarke(Dieseltrain)
The FCd should not change the idle ! It is designed to clamp the voltage over 3v up to 4.8 usually . Which means it only clamps the output from map to Ecu once in positive boost .
Sounds like a bad wire on the FCd or map sensor vac line ? I would put new clips on the coil packs as when they are broken they arc out .
Saturday, June 16, 2012 - 08:09 am, by: Layton Barker(Nos_soarertt)
All hks fcd make the car idle funny when adjusted while the car is running your only surposed to adjust when the car is off, as stated in the user manual. My car is getting the same problem once I hit 16+psi the car misfires then the engine light comes on and the car dies, but I have a blitz ecu
Saturday, June 16, 2012 - 10:34 am, by: Carl Mccormack(Eville)
So you have fuel cut do you have boost cut defender as well ?? Have you tried resetting the boost cut to a higher level? It's sounds like your just hitting boost cut.
Saturday, June 16, 2012 - 12:17 pm, by: Cameron Marshall(5ltbetr)
And the car will get through it.. If u keep it going it doesnt hesitate just on 5.. Then over like 5500 itll come back to 6.... its the identical noise to the trans ecu makes when it retards the timing during gear changes... Mm
Saturday, June 16, 2012 - 03:20 pm, by: Cameron Marshall(5ltbetr)
Know this sounds stupid but where is the ecu located on a jzz30 coz the fcd is in the centre console.... one way says norm.. The otherway says cut... Witch one should be to raise the cut?
The ecu on a nissan is footpanel,x7 behind the dash.. So not really a stupid q lol.... Ive only just moved to toyota peeps lol
Saturday, June 16, 2012 - 08:42 pm, by: Layton Barker(Nos_soarertt)
It feels like the car dies, like it hits a wall and the engine light comes on if its misfiring its not fuel cut I have the same issue but my soarer does not have fuel cut
Saturday, June 16, 2012 - 08:55 pm, by: Adrian McGuire(Adro)
If you coil clips are broken there is a very large chance you are getting a spark jump at high boost to rule it out just wrap the wires with some electrical tape to insulate them from any metal around them. It's a 5 minute job that could sort your problem. Even if it doesnt it will rule it out and you can move onto the next issue.
Saturday, June 16, 2012 - 10:57 pm, by: James Tims(Timzy)
Mate best thing to do is change over the spark plugs for new one's! It could be that and your coilpack clips being too lose. I had a similar issue to this and it turned out to be a faulty spark plug, looks good as but yeah that solved my problems
Sunday, June 17, 2012 - 08:47 am, by: Layton Barker(Nos_soarertt)
And check the injector plugs I had the same prob once and all it was, was a plug on the fifth injector, the car ran fine unrolled full wot and it sounded like a long dart haha
Sunday, June 17, 2012 - 03:10 pm, by: Adrian McGuire(Adro)
Justin, that's a very broad comment, I met a guy on Friday with a 550 kw 2jz running super sparks with no issues what so ever. My car is running 430 hp at the moment with super sparks and no issues aswell.hw many hp did your car run on dyno ??
Hay ardrian my rear housing was too big so we was reving to 9000 after about 3 runs it start braking down but it made 300kw on the std ones on a safe tune the motor got a lot more in it yet but they got worse and wores I may of just got a bad set
Sunday, June 17, 2012 - 05:02 pm, by: Adrian McGuire(Adro)
Have you got cams or had any internal work done Justin? There is a valid reason that Toyota set the rev limiter to 7500 on a 1jz. I have no problem punishing my motor but revving past about 8200 is asking for bad things to happen. If it was a drag car that got rebuilt every few meets then fine but as a street car it going to get expensive if you rev it that hard ( in my opinion) If you r going to rev your motor that hard you r going to need a dli or some other sort of spark enhancer.
It is fully biult 272 cam je pistons ported arp bolts from to to bottom I have sold it now its in qlds now but I had it at wolf ems in melb to get it tuned with the new turbo for the guy that I sold it too it made 275 with 1018 nm at 4500 with 10de timing but it had 30psi in it I spent over 20k on it
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