Hi guys, new to the forum here (:

I am currently driving an 06 Lancer ES (or CS3 as its called here), which runs on a puny 1.6 4G18. I am currently having a problem which I hope you guys can help me with, please do pardon the lengthiness

I have a turbo kit which I customised for this car, its a TD04L, running at 0.7 bar of boost. Other mods include an evo 3 throttle body, sub-injectors mounted on the intercooler pipe, spark plug cables, iridium sparks, grounding wires and a unichip Q ( I am only listing the mods which i *suspect* might be causing the problems). Last week, I decided to change to a staged-injection setup, by adding an additional fuel rail behind the stock one, with 4 extra injectors. Changed my cold side intercooler pipe as well, and a resonator. Hooked up the injectors, and went for a retune. Car pulled fine till about 3000rpm, and upon hitting 0.5 bar of boost, jerked violently and refused to go any higher. My tuner tried to rectify the problem, but to no avail. Everytime upon hitting 0.5bar, the car will just jerk and occasionally back fire. My tuner tried changing the crank style setting to that of a honda S2000, and suddenly, everything became fine. Car pulled smoothly to 1.1 bars of boost with no probs. We carried on with the tuning, and headed back. Switched off engine, had a cigarette, started the car back up, and the problem came back! After that, no amount of fiddling about with the settings could solve the problem.

So, does anybody know what might be up? If the problem had be constant, I could probably attribute it to a hardware problem, like faulty plugs or coils, but the strangest part was that for a short time, the car ran smoothly all the way, only after restarting the engine did the problem come back. I am stumped, and many thanks in advance for any ideas you guys might have.

 

Perhaps the car is having trouble when not "warm", and it's just a fluke that the crank settings "whatever that is" seemed to coincided with the smooth running.

What does your fuel look like at the higher RPMs, how do you monitor it? How does that second fuel rail function, dumping more at a certain engine load or is it constantly adding a set ratio, regardless of RPM. What do you tune with, the unichip Q does that?

 

The thing is, we tried for a couple of hours before calling it a day, and the next day, after about an hour of tuning, that was went everything went well. We stopped the car for about 5 min for a ciggy, and after it started acting up again, thus i doubt it is anything to do with warming up.

The 2nd fuel rail is set to only come on once the unichip map sensor detects boost, everything is tuned by the unichip Q, boost is controlled by an AVCR, a wideband O2 sensor was used to watch my AFR.

 

Any ideas guys?

 

well first off why are you running 2 fuel rails? msybe you cant get more boost because of too much fuel and meaning WAY TOO MUCH, Go back to one and just get bigger injectors and get it tuned that way.

 

oh yeah and 2 get rid of your injectors and get some heat range 7 ngk spark plugs your car is goig to run hot with those iridiums from what I heard.