4G93T Club

[ftzone]

Hi all,

I am having a problem. When the engine is slowly revved up to 1.6k rpm, the rpm will automatically go back down to 1.0k rpm. Problem does not exist when engine is quickly revved or when aircon is turned on.

When that occurs, the TPS sensor output seems to be stuck at 0.6V (the voltage should come down to ~0.5V when idling at 1.0k rpm).

I have cleaned the TB and checked the hoses. No problem with the ISC or TPS as i have changed it several times and it is still the same symptom.

I suppose your TPS sensor got a lot of electrical noise. Your ECU may think that you are at idle even you have your throttle slightly open. In this case to 1600RPM. Since you mentioned that your TPS voltage at idle is 0.5v. Try adjusting the TPS slightly to solve the problem. Bring it up to 0.6v at idle and see if that solve your problem.

 

[Mivec559]

why don't u try and see whether there are any hidden error codes that come up...
it could be the plugs/coils...if u have any spare parts lying around, u could do a trial and error...
good luck though..

---------- Post added at 05:45 AM ---------- 6 hour anti-bump limit - Previous post was at 05:43 AM ----------



good to see u've traced the main cause of ur problem...:D

Hi all,

I am having a problem. When the engine is slowly revved up to 1.6k rpm, the rpm will automatically go back down to 1.0k rpm. Problem does not exist when engine is quickly revved or when aircon is turned on.

When that occurs, the TPS sensor output seems to be stuck at 0.6V (the voltage should come down to ~0.5V when idling at 1.0k rpm).

I have cleaned the TB and checked the hoses. No problem with the ISC or TPS as i have changed it several times and it is still the same symptom.

Any ideas what is going on ?




Better check your TB. Maybe it is full of carbon too.



At what RPM is this occuring ?

have tried changed the spark plugs..but the problem remains..
will try to change the plug coils later while getting incoming next pay salary..
normally it occurs at around 2-3k rev..
it just sometimes choke and sometimes not..its like having hiccups.. =.="

 

[DLegend]

I've got 6 ECU fault codes after Northern Garage read it, but it can't be cleared. The fault codes most likely came on during the transplant... my engine is running fine.

any idea where in Penang I can do a diagnostics and clear the code?

thanks ya...

 

[ftzone]

DLegend what engine 4g93t? what are the fault codes?

 

[DLegend]

the CK model... fitted in Waja (that day met you at your shop, asking for mounting).

Those codes that I can remember : AFS, Knocking, TPS, .... the rest forgot dee.....

 

[chaf.song]

FTZone got dyno machine too... can contact raymond...
any GSR-ians here running on RON95...?
assuming stock ecu....

 

[ftzone]

the CK model... fitted in Waja (that day met you at your shop, asking for mounting).

Those codes that I can remember : AFS, Knocking, TPS, .... the rest forgot dee.....

It could be something else. How can so many error codes? Knocking also got error code? Or the knock sensor is not fitted la? Btw, no ready made solid mounting for Waja/CK yet ler.. all have to manually pump in.

---------- Post added at 12:47 PM ---------- 6 hour anti-bump limit - Previous post was at 12:42 PM ----------

FTZone got dyno machine too... can contact raymond...
any GSR-ians here running on RON95...?
assuming stock ecu....

Hi,

I don't have dyno machine yet. I rent. RON95 can be used if low boost..

 

[Speed Demon]

FTZone got dyno machine too... can contact raymond...
any GSR-ians here running on RON95...?
assuming stock ecu....

Tried running on RON95 but the engine pings. Using stock ECU with stock turbo and running 0.68 bar of boost. Am suffering now with a Walbro fuel pump. With careful driving and not going above 100km/h I can get 520km on a full tank. But do a bit of speeding and I will lose about 100km of my mileage!

 

[ehdrian]

Tried running on RON95 but the engine pings. Using stock ECU with stock turbo and running 0.68 bar of boost. Am suffering now with a Walbro fuel pump. With careful driving and not going above 100km/h I can get 520km on a full tank. But do a bit of speeding and I will lose about 100km of my mileage!

520km on a full tank?..wow!..i'm only able to get 120km for half tank of fuel, with slightly bigger snail+walbro+evo injectors+after market t/b+tuned emb..

 

[wailup]

Tried running on RON95 but the engine pings. Using stock ECU with stock turbo and running 0.68 bar of boost. Am suffering now with a Walbro fuel pump. With careful driving and not going above 100km/h I can get 520km on a full tank. But do a bit of speeding and I will lose about 100km of my mileage!

im running on RON95 with std boost. no pinging, unless i switch fuel (not intended, normally shell, but once a while pump in petronas, the ping came in during boosting). my full tank only can get 450km.. roughly, it's like 10km/litre.

 

[contreasjun27]

Hey people, I'm considering to change my
Evo turbine to Nissan silvia S15 turbine...the reason to change Coz it is causing pretty lot of turbo lag to me...then foremen recommend
to take silvia s15 turbo claiming the turbo is a ball
bearing turbo from Garrett which is GT28 AR60 is the codename...sifu sifu
Is that true???

 

[Alok]

also just changed my stock turbo to td05h, lag.. boost starting nearly 4k rpm, but it difficult to go over 7k rpm, izt the exhaust muffler affected? or stock gsr intercooler problem?

 

[Adeen]

Hey people, I'm considering to change my
Evo turbine to Nissan silvia S15 turbine...the reason to change Coz it is causing pretty lot of turbo lag to me...then foremen recommend
to take silvia s15 turbo claiming the turbo is a ball
bearing turbo from Garrett which is GT28 AR60 is the codename...sifu sifu
Is that true???

since i used to own a bmw with s14 sr20det, i can confirm that the s15 t28 is a ball bearing turbo..
when searching for 1, be sure the turbine code is exactly for the bb version. cause t28 also have the non-bb turbo...don't get tricked by ppl claiming the ar60 t28 is always a bb turbo. do a search in google and u'll have the right info in no time..

 

[contreasjun27]

also just changed my stock turbo to td05h, lag.. boost starting nearly 4k rpm, but it difficult to go over 7k rpm, izt the exhaust muffler affected? or stock gsr intercooler problem?

same bro...I got the same problem thats why Im looking for a better turbo or smaller turbo if problem still cannot solved

---------- Post added at 01:08 PM ---------- 6 hour anti-bump limit - Previous post was at 01:06 PM ----------

since i used to own a bmw with s14 sr20det, i can confirm that the s15 t28 is a ball bearing turbo..
when searching for 1, be sure the turbine code is exactly for the bb version. cause t28 also have the non-bb turbo...don't get tricked by ppl claiming the ar60 t28 is always a bb turbo. do a search in google and u'll have the right info in no time..

do you mind to share the code with us? After I did a few survey. Fellow friends based on their experience told me that if I'm having turbo lag on a TD05 turbine then I will suffer the same with T28 ball bearing turbo as well...

 

[Huat]

hi sifu-s! driving a lancer 1.8ralliart turbo..they call cs5 in singapore..
juz wanna ask 4g93T GDI got ani turbo manifold to change?
thinking to swop for TD04...heard need to change extractor to fit?

 

[contreasjun27]

hi sifu-s! driving a lancer 1.8ralliart turbo..they call cs5 in singapore..
juz wanna ask 4g93T GDI got ani turbo manifold to change?
thinking to swop for TD04...heard need to change extractor to fit?

only custom made is available bro...dont have ready stock in Malaysia market at the moment yet.

 

[Adeen]

here's a little info for you...

Jap PS13 14411-50F00
AU/NZ S14 (pre-facelift) 14411-75F00
AU/NZ S14 (facelift) 14411-75F00

Jap S14 (pre-facelift) 14411-69F00
Jap S14 (facelift) 14411-82F01
Jap S14 (Autech/270R) 14411-RP801 (Same as S15 early MT turbo)
Jap/ NZ S15 (early*) 14411-91F00 Manual model only
Jap/ NZ S15 (early*) 14411-69F00 Automatic models

Jap/ NZ/ AU S15 late* 14411-75F00 Same as NZ S14 and same for both Auto and manual
and also this (regarding BB or not)

So auspec S14/15 = None BB T28.
JDM = of course.

The first number is a batch number, it tells you when/where it was built
The second number is the "oem" number. On a nissan turbo it's a nissan part number, on an HKS turbo it's an HKS part number, on a garret turbo it's a garret number, on a Tomei turbo it's a tomei number etc etc. 14411-69F00 is a nissan part number.
The last number is a chra number. 466541 is a ball bearing cart with a 60 trim 60mm comp wheel and a 62 trim 53.8 mm turbine wheel, 466543 is a brush bearing cart with the same wheels. On this particular turbo the second part of that number describes what turbine housing is used. If it ends in 01 it means the "normal" turbine housing, if it ends in 02 it means the S15 turbine housing with the splitter between the turbine and wastegate exit.

thnx to What's the difference between S14 and S15 SR Turbos? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum
also some info here : T28 Ball Bearing And Non Ball Bearing Turbo - SilviaWA Forums

 

[Speed Demon]

520km on a full tank?..wow!..i'm only able to get 120km for half tank of fuel, with slightly bigger snail+walbro+evo injectors+after market t/b+tuned emb..

Not that surprised as all your mods increase fuel consumption.

im running on RON95 with std boost. no pinging, unless i switch fuel (not intended, normally shell, but once a while pump in petronas, the ping came in during boosting). my full tank only can get 450km.. roughly, it's like 10km/litre.

Yes, I exclusively use Shell fuel too. I guess the main difference in mileage is also because I manage to get on highways a lot. So I can cruise at a steady speed. But what's the use of having a turbo-charged car if you're constantly driving at low speeds? :stupid:

 

[Huat]

hi..GDI engine add injector and fuel pump got use?
GDI hard to mod.......

 

[contreasjun27]

hi..GDI engine add injector and fuel pump got use?
GDI hard to mod.......

add injector and fuel pump do helps bro...but you need to have tuning lah...without tuning no matter how big capacity fuel injector you install the car also wont fly...