1997 Pathfinder SE
Hi, I recently replaced my VG33E 3.3L and I can't quite get it to run correctly. I'm getting a p0300 but I'm sure the distributor and TPS settings are correct. My problem is in the "throttle system", I can rev the car normally while in park or neutral, but when in drive it doesn't recognize where the pedal is correctly. I can usually get up to around 20-25mph normally until the pedal "quits being recognized". What I mean by that is that it hits a certain point and then the vehicle quits responding to the pedal. I can continue to depress the pedal but my speed doesn't increase and the RPMs only slightly. I seem to be able to find a "sweet spot" sometimes by either depressing or letting off of the accelerator just slightly, and then the vehicle will continue to accelerate normally. Besides that, the only way I can accelerate reliably is to put it to the floor and then let off once I reach the desired speed. I have found two vacuum lines under the intake hoses that I can't find where they go, and I have an exhaust leak up near the driver side that sometimes makes a loud popping noise while accelerating. I'm hoping it isn't the manifold, but that's what I think it is because I couldn't feel or hear a leak at the converter. Also, I'm new to forums so sorry for the bad format etc.
To get to the Imgur album, put "/a/D6sJL" at the end of the url. What is circled or has arrows are the vacuum ports I am referring to.