Hey guys, so I posted a little while back about a problem with my 2005 5 spd Vibe base model. It's got around 120k miles on it, and for the past few months it's been hesitating when i lay off the gas and then re-apply the gas. It happens at all speeds, but is more noticeable at lower speeds. Also, when the vehicle is warm, it takes longer and is harder to start. I've replaced the plugs (Denso oem), coil packs, intake manifold gasket, checked for vacuum leaks, replaced maf sensor, cleaned throttle valve, PCV valve, checked injectors to make sure they click/tap.... I think that's it. Anyways, I still have the hesitation/stumble even after doing all of that, and it is very noticeable, not just a little hiccup. So I decided to pull the fuel pump and see if maybe something was up there. When I did, I noticed that one of the wires (red) from the sending unit (I think) appears to be burnt and is discolored. I was wondering if this could cause my symptoms of hesitation and hard start when warm. I attached a picture below of the fuel pump and the wires mentioned. I tried testing my fuel pressure and borrowed a pressure gauge from my local auto parts store, but I didn't have the right attachment to connect to the fuel line under the hood near the firewall, so I'm not sure what my actual fuel pressure is. It seems this car has a weird connector piece that the fuel line feeds into and it isn't like a regular schrader valve piece that the other cars I've looked at have. Any help would be appreciated, thanks!
Alright thanks man, do you know what fitting is needed to test the fuel pressure? I tried the other day but the line near the firewall plugs into this clip/snap in type of end and I couldn't find a fitting that actually went into it tightly. Unless there's another place to check the fuel pressure that I couldn't find.