Kedo
TYF Newbie
- Joined
- Oct 18, 2023
- Posts
- 2
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Hi y’all. I have a 2007 Tahoe flex 5.3 with 148k. Just bought the car a couple weeks ago. The previous owner didn’t know much about it but it had a p0301 cylinder 1 misfire with stabiltrack and flashing engine light. So I did my part and went and replaced coil pack, spark plugs, swapped wires around from 1 to 5 and no change. So I popped the valve cover off, inspected push rods on #1, they weren’t bent but thought while I’m here, I put two new push rods in. Still had the misfire. Next I pulled the driver side fuel rail, noticed #1 was a little dirtier then the others so I went down and bought a new injector. Still had the misfire on #1 cylinder. So over the weekend I pulled the head, took it to a machine shop and had them inspect the lifters weren’t bad(but did swap the intake and exhaust lifter around), the valves, springs, guides and everything came back 100%. Put everything back together yesterday. Fired it up and boom no misfire and ran like a champ. Then this morning on my way into work it reared its ugly head. What did I miss or what else should I be looking for? Map and maf are also replaced. Could it be rocker arms? Valve cover itself?
Any and all help is greatly appreciated.
Any and all help is greatly appreciated.