Are you still using the factory boost control? If so, it will pull boost if it sees knock. I'm guessing that you're runing out of fuel or getting a bad mix due to an air meter issue and when the car sees knock it's pulling boost/timing.

Seriously, your logs should tell you all of this. You might want to have the tuner to see what their thoughts are. You might need to log some additional variables to get everything they need.

 

Thing about a boost leak, tho, it'll cause you to run rich, not lean. The car will be dumping fuel to try to keep up with the turbo, but a boost leak will lower airflow, thus causing a rich fuel mixture, not lean.

Car pulls timing during knock, not fuel.

Sounds like fuel system or tune. Perhaps MAF or map or other monitor-system related, but that seems less likely.

 

well my tuner said its deff a hardware issue and not a tune issue. He went thru my logs i sent him of doing 3rd gear pulls ...cruising around ..and at idle. I also think if i was loosing boost my gauge would be reading -8 around there at idle. Im also running e grimspeed 3port ebc. I know that with the factory solenoid if it detects me leaning out it will try to cut the boost down for safety measures according to Map

 

If you don't mind me asking, who is your tuner?

 

Do you have a HF cat? Did you just recently add some mods or did this just start out of the blue? Sounds fuel related like pump/FPR/kink in a fuel line. What wideband are you using,is th o2 sensor good? Just trying to help...

 

I think his tuner is Map

 

I just had something similar to this where anything over 15 pounds boost I would lean out. Turns out it was the high voltage fuel pump relay.

 

The first thing is fix your fuel first then figure out the boost problem.
Rewire that pump and change the fuel relay.

Then boost leak test and check all the vacuum lines for the boost control there might be a small crack or something.

I'm not sure how to check your EBCs, but maybe the logs can show that.

My guess is if MAP says, its hardware, perhaps look at their hardware. What kind of waste gate is on the EF2 turbo? What is the stiffness of the spring? Too light it might be getting worn out and the exhaust pressure is pushing it open and its fighting not to.

Perhaps, pull your EBCS hoses off and run it from the wastegate psi alone. You can see if the wastegate is the problem.

Also, after you got tuned and it was driving great. What did you do? What did you touch?

 

Tuner is Speed Circuit. I do not have a high flow cat. Its a straight test pipe. After the tune i did not make any mods or touch the car at all except just drive it. I am using a AEM wideband. As far a relay i put in a new ssp fuel pump relay. The black one. The ef2 turbo uses a turbosmart wastegate. Includes 18psi actuator and additional 5psi spring (yields 23psi base pressure when installed)

 

STOP

You have a wideband. You know you're lean. You have a fueling problem.

Boost leaks will not cause you to run lean.

Your boost drop is from the ECU pulling boost when you go lean, likely because of knock. Keep doing full throttle runs and you'll be looking at a new motor.

You either have a bad injector (it happens and the deatschwerks' Evo X stuff has something of a rep for failures), your vacuum line to your FPR was compromised, or your fuel pump isn't getting enough power and you need to check or upgrade the wiring to it.

Lastly, it is still possible that your fuel pump relay went bad anyway despite your replacing it. It would be the cheapest and quickest test to swap another in there.

 

well the car is going back into the shop monday for diagnostic but im thinking it is the fuel pump issue. Im sure he has extra relays we can swap out to test them.

 

could the reasons stated above cause me loose about 100hp????

 

Of course it can. The issue could cause you to have no horsepower. Meaning, blown engine.
You need fuel, air and spark to make horsepower.

 

so i was at the shop for 12 hours today where i got the car tuned. We did a boost leak test found a big leak and fixed it. Did a pull and still leaning out to 14.5-15.0!!!! Changed the relays and still leaning out. Took out the fuel pump ...cleaned everything out...cleaned out the fuel rail/injectors. Went to go put the fuel pump back in and now the car does not start at all. We unplugged the fuel line and put a bucket in the front and the pressure of the fuel does not seem strong at all. Also while we were cleaning out the fuel line itself there was a **** load of debris and sediments in there. So we cleaned all that out cleaned the fuel filter and put the pump back in and the car still does not start. Tried wiring up the pump to the battery to see if the pump works and it does but the flow of the fuel seems kind of weak. ...so as of now car does not even start ...we are ordereing a new fuel pump housing/assembly and a new fuel rail so i can check fuel pressure

 

issue was a bad fuel pump. Sending it back to dw.Now im dealing with a cylinder misfire issue