My buddy and I been tring to street tune my turbo motor and trid to get get it not to stay running rich and when lean it out it be idle good and reads 14.7 on my wide and then m motor will die out... Then when we try starting it up it won't fire up then will have to add fuel then it fire up??? And I won't fire up no more???? I trid everthing I now on the car now and it to the point where I thinking bout just towing it to my tuner!!! But I rather try to get it street tune 1st b4 I have to pay more on the problem which I think it just something little!!!

Built lsv turbo
S300 ecu

 

How much vacuum is the car pulling at an idle?

It sounds like your wideband may not be properly reading.
The car shouldn't die at 14.7:1 if its pulling 18-21 inches of vacuum.

 

My vucuum on my boost gauage was reading in between of -0.5 n-1.0 at idle!! ( what is it sopose to be reading at idle anyway?

I'm running id1000cc injector (btw) with 255 fuel pump

 

Should usually be between 21.3 inHg - 26.5 inHg of vacuum. (10.5psi - 13psi or 114 mbar - 288 mbar)

 

Well any ideal what my problem is!!

 

Check the timing belt/mechanical timing.
Compression & Leak down test the engine.

Something sounds off.

 

That what I was thinking to on my timming that could be off but there all on TDC!

 

If the timing is right & the compression is good tow the car to the tuner and have him figure it out.

 

What wide band O2 are you using and where is it located in the exhaust?

How do you have your Closed loop, Fuel Compensation and Fuel Trim setup? How does your Voltage/Lambda Conversion table look.

 

Aem wideband and it's right at the bottom from my dp!! Close to my flange where it bolt up to my cat!!!! I'm not sure that my problem is from having a cat on the exhaust that will throw my afr off or ect??? I'm running 3in dp to 2.5 to cat all the way back!!!