FTO gpx 5mt help needed rev problem

Elixir · Post by **Elixir** » Fri Feb 13, 2009 2:26 am

Hey all !

This is my problem : FTO GPX 5mt . I start the car , let the engine become warm and drive away . Now when i realy wanted to push it it just cuts the fuel on 6000rpm . but the rev counter goes all the way to 8000 . I have a sfc controller , but i killed it when that happened and had another go . Still same problem . please help me because i have been fighting with it quit a while now .
(having in mind :that the fto wasn't doing fuel cut before although it has a limiter )

Ed_EViL · Post by **Ed_EViL** » Fri Feb 13, 2009 5:19 am

usually when your engine is still cold, your engine will "protect" itself and limit your revs to 6k - 6.5k

if your sure that the engine is warm
then you might have a problem with MIVEC not kicking in properly

try it again after driving around for 20 mins

Elixir · Post by **Elixir** » Fri Feb 13, 2009 6:22 am

the protection when engine is cold is common . I always warm the car for 10 min and drive for another 5 min to warm up
While driving ill only rev to 4k to shift .
So the engine is def warm .
And bam still happens . Ive ordered a obd2 scanner . Scanned the car and nothing . never removed the battery otherwise the ecu will reset . So its realy a head scratcher for me .
i have removed or unplugged some sensors just to check it (O2 and speed) because fuel cut is a fault in air fuel mix . but still hits fuel cut .
So the only thing i can think of is an engine temp sensor .

Post by **I8A4RE** » Fri Feb 13, 2009 8:10 am

Is ther sfc still connected?
How do you know its a fuel cut?

Elixir · Post by **Elixir** » Fri Feb 13, 2009 11:55 am

ive heard it before on an GTst <<<lol>>>skyline <<<lol>>> omg sensored I like.
Anyway
while i was working on the car and testing it .
on 6k it produces a couple soft bangs (not backfire) and de-accelerates and im scared to just push it to 8 with the fuel cut . But it would never work with fuel cut because the car slows down so you would have to speed up again and then bang 6k again with fuel cut .

Sorry about the push it till 8k : i meant shift normally till 3rd gear just before it hits 5.2k in 3rd shift back to 2 just to see what happens when rpm in 2 is above 6k .
But im scared , because engine might get broken and my poor gearbox .

Post by **Bennoz** » Fri Feb 13, 2009 12:23 pm

Firs thing I'd do is pull the sfc controller out & kick it at a lesser car. Its nothing more than bling. The standard FTO ECU manages fuel & air mixing just fine unless you've done some serious modification to the motor.

If that doesn't fix the problem, check your ECU error codes detailed here:

http://www.ftoaustralia.com/modules.php ... ic&t=14667

If it is a sensor that's playing up, this is the method to finding out which one. Much cheaper than buying them all & swapping them out one at time.

Also keep in mind, the rpm limiter that stops you over revving the car when cold, can last for a lot longer than 10 minutes. 10 minutes is a bare minimum, your geabox oil takes up to 30 minutes to get to optimum operating temp.

Also, changed you fuel filter recently? Check the fuel pressure regulator? Or your cat converter?

Elixir · Post by **Elixir** » Fri Feb 13, 2009 12:41 pm

The car has nothing realy on it now . only decat , new polished headers , vr4 injectors , walbro fuel punp , cai ,sfc contr. , msd ,light flywheel, heavy duty pressure plate , new cams and forged pistons. all new bearings and all the rubbers (almost anything that cycles or turns is changed )and i removed the turbo from it .
Fuel pressure is good !!!

The only thing i want but dont have is emanage or make the car awd .

and ive got an obd2 scanner and nothing turns up on it .

Im gonna take the whole engine apart tomorrow and start from scratch (that will take me 2 whole new days to get the engine running again .

last question . could it be my alternator ? (dumb question of mine but i have a feeling it plays a part because its connected to the ecu )

Post by **Bennoz** » Fri Feb 13, 2009 12:52 pm

Woah back a minute here!

What sort of Frankenstein engine is this?? 6A12 or 6A13??
Mivec or Non mivec?

Elixir · Post by **Elixir** » Sat Feb 14, 2009 1:12 am

it's the 6a12 mivec but blue printed . i was going for NA tuning . but i fitted the 6a13 fuel rails on it . the turbo went into my gf fto non mivec trip
BTW nice dishes on those wheels . what are those 18s or 17s

nvr2low · Post by **nvr2low** » Mon Feb 16, 2009 11:30 am

holy shhit batman. That sounds like a very impressive motor mate were do you live? Um this may sound noob but has this only been happening since you did all the stuff to the motor? Are you running a piggyback ecu? If your not it sounds like the motor is way out of tune e.g fuel air mixs and everything isint right mate. For all that work I would chuck a piggy back in the car and gt it tuned mate.

Elixir · Post by **Elixir** » Tue Feb 17, 2009 2:08 am

nah the car worked fine with all the work done.
the sfc controller is kinda a piggyback. all air/fuel mixtures are good. all my sensors are working and no heater cables are making a short circuit.PLease dont focus on my spelling . English isn't my native tounge .javascript:emoticon(';)') .
I have the whole engine working again . and it stopped doeing the fuel cut . The problems were several .
the connector of the alternator was bollox so had to make it again . the hydrolic mivec engagers in the motor by the cams were F**** so had to aid them . the cable of my spark plug front bank right was not getting enough juice so it had a weak spark . the fuel rails couldn't hold compression (why i don't know) so i've rebuild them but now with 350cc injectors. Just in case removed old fuel filter and put in a new 1 . timing belt was worn out for some reason (was only 8 weeks old). and timing was a little off . ive added an mph converter box and hooked it up to the ecu . so i kinda delimit the car , because it thinks the car is going much slower because of the mph electrical readout to the ecu being much to low compared to km/h . and this time i reflashed the ecu and removed the safety featers of the dam car .

Elixir · Post by **Elixir** » Tue Feb 17, 2009 2:16 am

safety featers of letting it warm speed limited (so double delimit)
fuel cut safety also removed .
the car is driving like a dream . 1/4 mile i've done NA in 10.8 sec
and i'm pleased !!
I live in Suriname . a place in south america . javascript:emoticon(':)') i will only go turbo with emanage and awd on the fto . those are my next plans . already have an evo 8 engine and gearbox and differentials to fit in my roling fto . (yeah i have 3 fto's)javascript:emoticon(':lol:')
i've got a lot of cars . that's basically the only thing i can do .I dont need to work all my work is done for me (get this i'm only 23 . so i have a lot of spare time on my hands .

Post by **vipfto** » Tue Feb 17, 2009 7:42 am

care to post up the time slip of 10.8

Post by **I8A4RE** » Tue Feb 17, 2009 7:51 am

vipfto wrote:care to post up the time slip of 10.8

Exactly what i was thinking

sublime19 · Post by **sublime19** » Tue Feb 17, 2009 8:56 am

Elixir wrote:safety featers of letting it warm speed limited (so double delimit)
fuel cut safety also removed .
the car is driving like a dream . 1/4 mile i've done NA in 10.8 sec
and i'm pleased !!
I live in Suriname . a place in south america . javascript:emoticon(':)') i will only go turbo with emanage and awd on the fto . those are my next plans . already have an evo 8 engine and gearbox and differentials to fit in my roling fto . (yeah i have 3 fto's)javascript:emoticon(':lol:')
i've got a lot of cars . that's basically the only thing i can do .I dont need to work all my work is done for me (get this i'm only 23 . so i have a lot of spare time on my hands .

Pics of engine bay / car / dyno sheet or it never happened.

i've got a lot of cars . that's basically the only thing i can do .I dont need to work all my work is done for me (get this i'm only 23 . so i have a lot of spare time on my hands .

Yes... and your point is?

xSlurpee · Post by **xSlurpee** » Tue Feb 17, 2009 9:32 am

if his rich enough to have a 10sec FTO still in N/A

im sure he wouldnt bother with a forum for advices .... this guy sounds like tdog

nvr2low · Post by **nvr2low** » Tue Feb 17, 2009 10:22 am

wow man sounds impressive. Slurpee mate everybody needs a hand doesn't matter how rich you are and he just said he pulled his motor apart and did the work. Lol some things trick you haha

Astron_Boy · Post by **Astron_Boy** » Tue Feb 17, 2009 10:44 am

i would think it be very hard to assess a problem with a heavily worked engine, from people that have near stockish cars...
Apart from the turbo boys.

I would have said your alternator, which can affect MIVEC not happening, but who knows.

Might have to hunt around for a wizard (mechanic)

P.S. pics please

Post by **vipfto** » Tue Feb 17, 2009 6:44 pm

what^^^
do any of you guys know what it would take to get it down the 1/4 that fast without turbo! let alone the 6a12 motor and with mods described IMPOSSIBLE

sublime19 · Post by **sublime19** » Tue Feb 17, 2009 10:26 pm

vipfto wrote:what^^^
do any of you guys know what it would take to get it down the 1/4 that fast without turbo! let alone the 6a12 motor and with mods described IMPOSSIBLE

Even Jeff's page on his FTO says it *should* be able to do a 11 second quarter mile.

And did anybody care to look up stock quarter mile times for a R35 before commending this guy