My 2.5 began being hard to start about 3 weeks back, since then it has ran worse and worse. Last week it got to the point that i could floor it and never get over 40mph, so i stopped in oreilly and ran codes... misfire 3rd cylinder p0303 or something like that.
Time to take a look..Ok so first thing i looked into was the coil packs, the front coil pack seemed to only be firing on 3 cylinders with , you guessed it number 3 cylinder not firing. The rear coil pack had no fire whatsoever? (im only testing by pulling the plug wire off to look for spark by the way) So, does the rear coil pack go to the "waste spark" system aka the exhaust side? am i right about that or do i have it backward? should the rear coil pack always have spark or is it intermittent and controlled by the computer when it senses ....whatever it senses????? Anyway, thats the easy part of the equation......
Theres way more to the story, for the past couple weeks i have been hearing this sound of liquid dropping down into my oil pan which i have thought was oil this entire time,although i have never noticed the oil being that loud dropping back down to the pan. Now im thinking its gasoline because i put a fuel pressure guage on the fuel rail and it will jump up to 65psi MOST times with koeo , but not EVERY time. KOER it stays steady at 65 no matter if its idling or your "goosing" the throttle. BUT when you turn the truck off my fuel pressure drops like a rock from 65psi to around 20 psi in 1 minute or less. I put two and two together (dripping sound in oil pan plus the drop in fuel pressure) and assumed it was my injector(s) leaking the fuel down through the cylinder so i removed the intake and the rail to where the injectors are free and i can see the pintle and kicked the key over expecting one of the injectors to dribble like a high schooler with the clap , low and behold......NOTHING. not a drop spilled. tried several times, still nothing besides the pressure blew an injector or two off the rail.
Any kind soul want to help me out here with some ideas? i just dont believe its not the injectors, but by now im pulling my hair out and probably just want to believe its the injectors and not the pump since theyre out already. i plan to do a continuty test on them tommorow but im tired and wondered if maybe im not just missing something here. Any ideas?
Time to take a look..Ok so first thing i looked into was the coil packs, the front coil pack seemed to only be firing on 3 cylinders with , you guessed it number 3 cylinder not firing. The rear coil pack had no fire whatsoever? (im only testing by pulling the plug wire off to look for spark by the way) So, does the rear coil pack go to the "waste spark" system aka the exhaust side? am i right about that or do i have it backward? should the rear coil pack always have spark or is it intermittent and controlled by the computer when it senses ....whatever it senses????? Anyway, thats the easy part of the equation......
Theres way more to the story, for the past couple weeks i have been hearing this sound of liquid dropping down into my oil pan which i have thought was oil this entire time,although i have never noticed the oil being that loud dropping back down to the pan. Now im thinking its gasoline because i put a fuel pressure guage on the fuel rail and it will jump up to 65psi MOST times with koeo , but not EVERY time. KOER it stays steady at 65 no matter if its idling or your "goosing" the throttle. BUT when you turn the truck off my fuel pressure drops like a rock from 65psi to around 20 psi in 1 minute or less. I put two and two together (dripping sound in oil pan plus the drop in fuel pressure) and assumed it was my injector(s) leaking the fuel down through the cylinder so i removed the intake and the rail to where the injectors are free and i can see the pintle and kicked the key over expecting one of the injectors to dribble like a high schooler with the clap , low and behold......NOTHING. not a drop spilled. tried several times, still nothing besides the pressure blew an injector or two off the rail.
Any kind soul want to help me out here with some ideas? i just dont believe its not the injectors, but by now im pulling my hair out and probably just want to believe its the injectors and not the pump since theyre out already. i plan to do a continuty test on them tommorow but im tired and wondered if maybe im not just missing something here. Any ideas?