Mechs and Techs...PLEASE HELP!!!!
Mechs and Techs...PLEASE HELP!!!! I have a 6.0 in an 03 ss silverado. All stock besides headers and exhaust. For some reason when I go to give it even half throttle, she doesn't want to pick up and go like she should. I have no CEL and no codes. The motor still runs lean too, but even when it ran lean before I never had this problem. I have a 255lph walbro in the tank and an inline. Replaced plugs,wires, coils, cats, o2's, and injectors already. I have about 50psi coming from the fuel rail at idle but about 60 WOT. Oil pressure runs about 35 idle and ~65 when I step on it. Now with the problem the oil pressure slowly climbs up. Maybe pump starting to go or an o-ring? But I also have a noise that sounded like it was coming from bank 2, but it sounds really more of rear center. I pulled the valve cover and everything looked fine. Oil wasn't really shooting up but it wasn't dry either. I thought a cracked intake manifold, but I am not sure why it would crack out of nowhere and the noise doesn't sound much like a leak. I am stumped here. Any ideas?
Justin
Justin
My scanner doesn't work now (idk why) and have to send it back to Diablosport. When I had the problem with it running lean before, I checked the long and short term parameters with it and everything was in range. Since I couldn't use it now, I checked all injector connections and pulled them to see if there was a build up, but nothing. I was thinking I spun a bearing, but I won't know until I drop the pan. Just looking for other options before I go through that hassle.
I have a 6.0 in an 03 ss silverado. All stock besides headers and exhaust. For some reason when I go to give it even half throttle, she doesn't want to pick up and go like she should. I have no CEL and no codes. The motor still runs lean too, but even when it ran lean before I never had this problem. I have a 255lph walbro in the tank and an inline. Replaced plugs,wires, coils, cats, o2's, and injectors already. I have about 50psi coming from the fuel rail at idle but about 60 WOT. Oil pressure runs about 35 idle and ~65 when I step on it. Now with the problem the oil pressure slowly climbs up. Maybe pump starting to go or an o-ring? But I also have a noise that sounded like it was coming from bank 2, but it sounds really more of rear center. I pulled the valve cover and everything looked fine. Oil wasn't really shooting up but it wasn't dry either. I thought a cracked intake manifold, but I am not sure why it would crack out of nowhere and the noise doesn't sound much like a leak. I am stumped here. Any ideas?
Justin
Justin
Your kinda of all over the place with your description above. A spun bearing would be a little more than a ticking at idle. Is your oil pressure not jumping up because the engine is not revving like normal? If the intake was cracked it would have a lot of trouble maintaining idle if it would idle at all. Why do you think its running lean? Any chance the ticking is an exhaust leak? Just because you have good pressure doesnt mean you have good volume (supply).
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