i have the PE TT set up on my car and right now the car is running lean ... what do you think is causing this problem? any advice would be of help ... thanks ...

 

What are you useing to monitor your air/feul ratio?
At what psi are you running?
What size injectors?
Have you upgraded your feul pump?
When is it starting to run lean? partial throttle/50%/100%
What octane are you useing when you fill up?

 

sounds like Gurg part II...yikes!

 

ask gurgen, and stop driving before you blow!!!

 

nothing to monitor af ratio
4.3 psi
380 injectors
it come with the walbro 255 fuel pump and regulator
when it is running lean, i am not sure, just know that fuel pressure is below stock
91 octane

 

Why do you think you are running lean?
What are you useing to control the injectors duty cycle with? Emanage?
Are you determineing that your running lean from the fuel pressure being lower?
Is the regulator adjustable or preset?
How much lower is the fuel pressure than what the stock setting would normally be?

Because you installed the walbro 255 your fuel pressure regulator is getting alot more fuel over what the stock fuel pump would be sending. So yes your fuel pressure should be stock or slightly lower than stock.

 

Actually, when you install the Walbro 255, your fuel pressure be significantly higher at idle vs. stock. I cant recall exactly how the PE system runs its FPR, but I am sure Gurgen can chime in. You need to setp a true return system, and plug the FPR to provide stable and rising fuel pressure.

With the basic PE kit, you dont have the ability to tune on the fly...youd need to send your ECU to TS and have them reflash accordingly.

Have you considered running an eManage with ignition and injector drivers so you have adjust fuel and timing directly?

 

Out of the box, you shouldn't be running lean. But you haven't quantified what you mean by that so it's hard to judge. What other mods do you have?

You've double checked the FPR and you're sure that you have the Walbro in there, right? (sorry for the dumb questions)

--Steve

 

Anything more on this? Just wondering what was actually wrong and if you corrected it or not?

 

The parts that i have installed are a clutch and a lighten fly wheel, sway bars, coil over, exhaust, but no mods to the motor. I don't have any piggy back or reflashed the ECU.

Since I am not a mechanic I took my car to a friend's shop. From what they told me the car is running below stock fuel pressure after the used a guage to measure it. Also, when they were driving the car they could hear the car pinging and the sparkplugs were also white.

Tomorrow they are going to put a correction kit so i can use my driver side tank, since i had the turbos installed i was not able to use up a full tank of gas and this correction kit should solve that problem. I am not sure if it will help with the fuel pressure.

I am leaning towards putting a Greddy eManage as the piggyback or with a TS reflash. And I guess while i am at it I'll put in some helix test pipes and a new y-pipe.

I just want to make sure that i don't run lean in the future. I am just trying to prevent a bigger problem from happening. My goals have changed since encountering this problem. I wanted to produce a 400whp + car but hearing what can happen and the cost, I am trying to go with a more reliable hp for a daily driver.

thanks for the input everyone =)

 

What is controlling your feul and the injector duty cycle? If you are letting the ECU control the feul system, if anything with bigger injectors you should be running a tad rich, not lean.

When I installed my walbro 255 it raised my feul pressure because more feul is now being sent to the pressure regulator. I actually had to lower my feul pressure 2 psi below stock.

How could they hear the car pinging? What device did they use to determine this pinging noise.

I have no idea what you are referring too, could you explain more about this correction kit? What do you mean by driver side tank?

Is your friends shop a performace shop? If they are not familar with twin turbo or turbo set-ups in general, I would take it to a performace shop that knows a little more. The feul system is one of the most important thing on a turbo set-up.

I also noticed that you are running 91 octane. I would check and see what octane is recommended when useing this particular twin turbo kit and at what PSI to set it at. Most cars with forced induction need to run a higher octane so the ECU will not detect knock and pull timing. If its available in your area I would use 93 octane unless 91 is your only option.

I don't know if you have put the car on the dyno and tuned it yet, but if you haven't I would get it there as soon as possible. The person tuning should be able to adjust boost, feul pressure(if its adjustable), and help your car running better.

 

thanks everyone for the input, it was greatly appreciated ... i will let you know the outcome once i get back to LA.

 

The siphon correction kit allowd you to plug the stock intank FPR, but also allows the siphon to function properly so that both sides of the tank drain correctly.

You have to plug the stog FPR, or else you have dropping fuel pressure as RPM and boost rise. The stock VQ fuel system is totally inadequate for any type of sustainable and reliable FI applications.

CJ Motorsports and Altered Atmosphere make correction kits. PM me or email if you need more details on this.