Hey guys, first post here, I hope you all can help.
A couple days ago i went to start my car and just after it started I heard a strange noise coming from what seemed to be the drivers side firewall, though it could have been anywhere. The noise started just after the car started and lasted about 10 seconds. Later the car seemed the pulse as you excelerated at about half throttle and 3-5k. Later that day the car wouldn't start. I didn't hear the fuel pump priming so I pulled the fuel lines off at the fuel pump and turned the key and no fuel was coming from the lines. I installed a Walbro 255lph pump and now the symptoms seem worse. The pump primes, there is fuel coming from the lines. Now when I start the car sometimes it stalls just after starting, sometimes it idles like **** and sometimes it just doesn't start. When i get into 2nd or higher gear and enter boost the car begins to hesitate and jerk.
So far I have cleaned the MAF, checked connection on the knock, CPS, TPS, ICV, and any other sensor I could think of. Replaced the fuel pump, the fuel filter was changed about 1 year ago. Also put new plugs in a year ago as well. checked the air filter and reset the ECU. I am out of ideas, tomorrow I will get an OBD11 tester and see whats on the computer but I still have not seen any CEL. Oh and
Why would my car drive worse after a new fuel pump?