Gutless GT4 PLEASE HELP!

[matt dunn]

All cars run in closed loop mode when they are warming up. In fact they are only in open loop at light throttle in cruise mode, that is the only time the ecu is actually responding to information from the oxy sensor.
When you use full throttle, or idling, or in warm up it runs on its preset closed loop programs. the oxy sensor is only really there to satisfy emission laws in japan etc which is why most NZ new vehicles are not fitted with them, other than Oz spec cars.

As for the young ladies problem yes the cold start injector is a good place to start or the CTS.

Chris

Not to be fussy but you have put open and closed loop in the wrong places.

Closed loop is when the o2 sensor is being used, as the loop goes,

ECU injects the fuel into the engine
engine burns the fuel out to the exh
O2 read the exhaust and sends back to ecu
ECU injects the fuel into the engine

etc etc and the cycle continues.


Open loop the ECU accepts no feedback from the o2.

[Pelo]

Possible knock sensor fault? I have seen that a few times on 3sgtes, usually the wiring gets cooked

[Boosted_162]

Possible knock sensor fault? I have seen that a few times on 3sgtes, usually the wiring gets cooked

Nope, i killed my knock sensor, and all you get is CEL on permanently (code 52). Still ran and boosted sweet.

[Skin]

She really needs one of you guys to have a drive of it for her, theres only so much you can gather from info provided on the net, and im sure she wont be short of volunteers...

And just in case you do change the plugs, your after Denso pk20r8, go see your local Toyota dealer and ask for 4 of them

[Silent Knight]

She really needs one of you guys to have a drive of it for her, theres only so much you can gather from info provided on the net, and im sure she wont be short of volunteers...

Someone call my name?

[Skin]

Well I wasnt going to mention names....

[Malcolm]

I would offer, since I'm out west, but since I already have myself a girlfriend it would be unfair for me to deny others a prime spading opportunity

[Boosted_162]

I would offer, since I'm out west, but since I already have myself a girlfriend it would be unfair for me to deny others a prime spading opportunity

Your sounding like nobody else on here is actually gunna go have a drive to see whats actually wrong with the car Malcolm

[Norty]

I have had the same issues with the GT4 once or twice when cold. I have a feeling i have either a vacum line on the wrong way or a break somewhere.

but with me its not all the time only sometimes, but since then i have been warming my car up before i go anyway

Very interested in finding out what is could be so please post back!!!

[Skin]

I wonder if it could possible be a small leak in one of the intercooler connector pipes. My mates one was especially gutless, did a bit of detective work and found that the intercooler-to-throttle body connector had a split in it. During idle it was sealed up enough to not affect the AFM, but under boost it leaked like a sieve and pissed a lot of the air away.

[Tania]

back again... well it seems to have stopped doing it
strange....
i know the air intake pipe has a small split..... could this be it??
anyhoo car is moving to a new owner shortly soo im hoping it stays fixed... whatever it is!

[Silent Knight]

Aaww, I was hoping to come and 'diagnose'...

[Tania]

well.... you can come and have a look if you like..... its just no so bad anymore, eg. not as stupidly gutless as it was before... but its not great.... i usually warm her up before i go anywhere, its just when i leave work to go home that shes not 100% coz i dont have the patience to wait! what do you drive?

[Norty]

I had the same issue, check the TPS like was suggested on many posts here and reset it back to default it was out quite alot and then my timing was out so reset that and now everything is sweet as

Dont know if this will help you but had the same kind of problem and now its gone.

[Silent Knight]

what do you drive?

I drive a Soarer... clicky the picture in my sig!
PS. If there is a leak or a crack in one of the vac hoses you should replace it.

[asweetdude]

could be miles off here, but i know that soarers run a 2 stage fuel pump. it increases the fuel pressure on boost.

Do 185's run this too? if so, ive heard of this type fo fuel pump half dying, e.g. doesnt get the fuel pressure its supposed to when its in the off-boost setting.


Just a guess.

[matt dunn]

Yes ST185's do have a 2 speed pump.

the relay for the two speeds in in the front right corner in the fuse/relay box.

[fivebob]

could be miles off here, but i know that soarers run a 2 stage fuel pump. it increases the fuel pressure on boost.

Do 185's run this too? if so, ive heard of this type fo fuel pump half dying, e.g. doesnt get the fuel pressure its supposed to when its in the off-boost setting..

No, it increases volume delivered on boost, the pressure is controlled by the regulator, not the pump.

I can't see how this could cause the problem described, as fuel delivery to the cylinders is dependent on pressure at the injectors. Unless the volume supplied by the pump is not enough to maintain that pressure Which at idle/low boost is so low that the pump would have to very sick, to the point that I doubt the engine would run at all.