Ok last week I got feed up and took my car to a camaro bud, Some info on the car, I just changed my headers, I have pacesettler mids. Well, the install went very smooth for me. After putting everything back together the car won't shift only on WOT. I checked everything. All the sensors are working. I changed the
o2's as well. There isn't any exhaust leaks either. I thought it might have been the TPS but I didn't want to touch it. Anyways, after the car being at the shop for a day they called me up and told me it was the fuel pump and they wanted 850. Dollars for. Well anyways I bought a fuel pump and filter and had them install it for about 288. Didn't help the miss. at this point I've changed everything wires plugs opti coil ICM BCM PCM u name it. The cars been at the shop for about a week and its just pissing me off. I'm about to tell the guy that I'm going to take the car out. My local dealership doesn't want to touch it since I put the headers on. The car is more bone stock just a lot of bolt-ons. Any idea guys. or places u can recommand. Im in Ventura COunty in california. Thanks Guys

 

Make the plug gap .035 and use NON exotic metal plugs(platinum,iridium,etc)
Are the valves adjusted right? Have ya checked for a flat cam lobe? Have ya checked your A/F ratio?