Just hooked up the hks fuel cut defenser can ran really good for awhlile then after a bit it started hesitation from idle to 3800 then it would take off and pull really good. Any ideas whats going on?

 

My guess is the grounds, with the whole 3800 hesitation. Do a search for 3800, you'll see it everywhere.

 

Any other mods?

 

its not really the 3800 hesitation because it does it from idle to 3800 then takes off. Other mods are intake, full 3 inch exhaust, aftermarket fuel pressure regulator, walbro 255, rc engineering secondarys, the motor is a atkins streetport, and aftermarket bov.

 

Try taking the FCD off and see what that does! If it goes back to normal then you know the FCD is your problem. Sorta have to eliminate everything.

Have you ported your wastegate?

 

no havent ported the wastegate. I plan on running 15 pounds of boost on the stock turbo if i can figure out what the problem is first.

 

lol

good one.

 

15psi on stock turbo?
you should think twice about that

 

+1

 

If you haven't learned already you shouldn't run 15lbs on a stock turbo! Esp an s4 setup. Do some research and find out what you can do.

I plan on an s5 turbo upgrade/ Ported with about 6 lbs of boost. IF you want 15lbs it will cost you some money and with your knowledge I would say lots of money!!!

 

and you sure as hell dont want to do that with a stock intercooler

 

15 psi is a bad idea. Please do your research on the forum before coming up with this conclusion. After about 12 psi the stock turbo will just create more heat than power.

Porting your wastegate should be a mod to think about however since the S4 has such a small wastegate.

You can still enjoy the car at 8 psi and make plenty of power for right now.

 

+1

 

Is the HKS FCD on the right setting?

 

Just a thought, but you have the correct one for the FC3S? HKS has like 3 models of the FCD for various vehicles.

 

its the hks std and its on setting 2 which is what it is suppose to be at. Also just put in aftermarket fmic.

 

its the hks std and its on setting 2 which is what it is suppose to be at. Also just put in aftermarket fmic. Found out the problem was the fuel cut defenser. Unhooked it and it ran fine.

 

why do i have this feeling your gonna be posting in a couple days asking questions about testing compression

 

Na i just dont really care about the stock turbo. Im gonna run 14 on it till it blows. Then im going to get a power fc and actually put a decent turbo on the car.

 

Hmmm, I dunno if it would take that for very long. Just make sure before you boost over double the factory setting that you have the supporting fuel mods. Good luck.

 

I would be concerned about the ENGINE TOO.... not just the turbo.

 

hahahaha it wont be the turbo that blows. omg this kid is just asking for it. Here I will save you some time, take off your UIM, find some gravel, and put it in the holes. Close UIM, now start car with gas pedel all the way down for 5 seconds.
Now get a new engine.



Why on earth do you think you can handle 14 psi?
Now before I go on, this is really just a joke right? You own a 240sx or something right?

First, do you have lager injectors? Do you have a better fuel pump? Do you have a better FPR (I guess not absolutely needed), you said you have FMIC, do you have a standalone to retard the timing? Even with the HKS FCD the ecu doesn't know to change timing past a certian number. (I think 8) Your turbo is now just a huge hairdryer forcing extremely hot air into your engine. I have no pity for you if you REALLY are really trying to do 14 psi with the stock turbo and just a FCD.

I hope no one helps this kid once he blows his engine.

 

Ill buy your car after you blow everything...hahaha LMAO!!!

 

opppsss didnt notice his mods list above. :P Good luck buddy. You're heading in the right direction but just swerved off a little. Research and get back onto the right track.

 

First of all the motor is not stock its a atkins 13bt with a streetport
Has the atkins thermal pellet
Aftermarket walbro 255
Aeromotive fuel pressure regulator
Rc enigineering 800cc secondarys
Msd Ignition wires
Intake
Fmic
Custom 3 inch from turbo back with Pre silencer
And i just took out the trans and did a full rebuild reinstalled it with a excedy clutch