S2k Greddy Turbo not working all the time??!

[EK4R]

Hey guys

recently friend and i encountered a problem with project car.

its a s2000 with the greddy bolt on kit. Anyways the car is tuned and previously running fine.

Problem is , lately its relucant to pull ? it would continuously spool and pull then back off and pull again. Asif the torque just dropped.

Funny thing is, after a long cruise on the freeway without much hard driving, the car would pull constantly like new.

hmmms im stumped?

[Perry]

Checked all the pipings or could be ECU playing up?

[lil_foy]

Make sure he has oil etc.
Seems like his vtec may be disengaging or even his wastegate is sticking open.

[Latino CRX]

what about fuel pressure ???

the boost pressure mite be startin to get to much for the fuel pump or regulator ...

[hisoka]

is it internally gated or externally gated.

as said sounds like the waste gate is getting stuck open.

what boost reading is he getting when the power cuts out, what psi is it reading

[VTi_b0i]

could be the hot weather
my car feels like a nugget when its hot...feels like its dropped like 30kw haha

[EK4R]

Make sure he has oil etc.
Seems like his vtec may be disengaging or even his wastegate is sticking open.

il double check oil tonight, Vtec has been raised to 7400 due to greddy turbo is too small for to keep up with vtec and it drops in power if vtec is opened too early.

what about fuel pressure ???

the boost pressure mite be startin to get to much for the fuel pump or regulator ...

fuel pressure is around 6-7bar ? the car idles dead on 3bar , during curisng its around 6-7 also. never drops. most slightly up and down

is it internally gated or externally gated.

as said sounds like the waste gate is getting stuck open.

what boost reading is he getting when the power cuts out, what psi is it reading

i think its internal. how do you check if waste gate is stuck open. Cause it works perfectly fine sometimes :S

as for boost, well the guage he had installed i believe it was not going above 6psi.

[Lukezen27]

could be the hot weather
my car feels like a nugget when its hot...feels like its dropped like 30kw haha

As Christian said

Hot weather makes boosted cars feel weird power wise

[lil_foy]

Make sure boost isnt dropping when it seems to back off and come back.

[EK4R]

Make sure boost isnt dropping when it seems to back off and come back.

nope its constant. its just at 6psi but i feel no pull just the spooling sound LOL


also we find something interesting today.

when the car first starts, it would turbo perfectly. hard pull at 6psi. after about 30mins or so. the car doesnt respond as well. maybe heat? i dont know.

when you floor it, you feel a sudden resistance. you just hear the spool but no pull. werid as?!

[lil_foy]

nope its constant. its just at 6psi but i feel no pull just the spooling sound LOL


also we find something interesting today.

when the car first starts, it would turbo perfectly. hard pull at 6psi. after about 30mins or so. the car doesnt respond as well. maybe heat? i dont know.

when you floor it, you feel a sudden resistance. you just hear the spool but no pull. werid as?!

Go get it on a dyno, it could be getting hot and knocking so the computer is going into safe mode maybe?

[EK4R]

Go get it on a dyno, it could be getting hot and knocking so the computer is going into safe mode maybe?

yeah xmas period isnt helping will have to wait till i come back.

after further examining, the car drives fine at the start. but after 15mins or so you hear this Humming noise. and this is when the turbo starts acting werid.

noise increase relative to rpm....

no idea