Hey guys, I have been in the the forums in and out am a student so i have lots to read .. nonetheless i make time to inform myself about my hobby . I have a 96 Z28, can see in my sign the modifications that i have done to it at this point . I am very aware that i need a tune. it seems to me that the car is running rich, I have been ignoring the Check engine light for a while not and well i think its time to get it done. I have added headers and seems to me that I have leaks just before the cats, I will get that taken care of this weekend.

I got these codes: P0133, P0153 ( sensors rich, or too lean, maybe the leaky connection is giving me this) I change the O2 sensors two months ago,

Also i got a p0300, misfire, going to check that aswell, since plugs were change about 3 months ago with ngk nt55r IX,

then i have p0336 ( faulty crank position sensor) ,

p0400 and a p0443 which i believe are due to a bad egr silenoid, I just order that from autozone along with the crank sensor.

So my question is, should i just return the two parts and send my pcm to get tune for all the changes that i have and have them disable my egr system, also i heard of people disabling the crank position sensor aswell.. whats my best option. i really dont need to be emission legal , I will leave egr system on for now, until i get long tube headers. I just want the best value solution. . Remmember am a student and... well can't fork out too much $$$$ i got a job but still does not allow me to live well and let my car be how I would like. N-eways:

Egr silenoid and crank position sensor was 70 dollars ( which i can return)

MADz Tune performance tune is 150.. so technically i need only 80 more dollars to have a tune and get all that other s**t fix instead of 150 plus 70 right?

What's do you guys think is my best option???

I am a Do it YourSelf type of person unless i have no really knowledge such as welding exaust pipes.. etc.. any ideas???

Thank you for all of your help