| Hey guys, In the process of getting my motor to try and finally fire on all 6 cylinders and I'll tell you, it's been quite a rocky road so far. Originally on start up, I didn't have all 6 cylinders firing. I had a perfectly running and contributing driver side bank, but the passenger bank always had issues with firing. I had heat (EGT gauges on both banks) but I never was able to get all three cylinders to fire. Fast forward a generous portion forward, here's where I'm at.
-Wiring from ECU to J&S to Coils has continuity.
-Wiring for LS coils has integrity (I have deleted the PTU and run the 5v signal wires from ECU right to each coil)
-Injectors have been tested, ohmed, and checked visually for fuel delivery
-Timing has been done TWICE and is spot on
-CAS is known good
-ECU was known good, ran perfectly on my old setup
Problem I'm facing now is the same problem--Driver side is fine, passenger side is not contributing.
My data thus far: VIA EGT, with passenger side injectors disconnected completely: Start car, add injector 5, no heat added. (73 degrees)
add injector 3, no heat added.
Add injector 1, heat is developed, goes to around 170 and climbs to around 200 and thats it. I do a compression check--
Cylinder 1: 130
Cylinder 2: 150
Cylinder 3: 135
Cylinder 4: 150
Cylinder 5: 0
Cylinder 6: 150 I investigate the 0 compression on cylinder 5, via leakdown, I have 90% leakdown through exhaust valves. I decide to try and influence the valves to close via BDE gear, so I advance and retard and the leakdown amount varies about 2%. I then remove the valve cover on that side to investigate and see what is exactly going on with the cam. Observing that the lifters are constantly under pressure from the cam, I then unbolt the cam about two threads and the lobes on the cam begin to release the lifters. I do this while the leakdown tester is connected to Cyl 5. Immediately the cylinder goes up to 10% leakdown and the hissing out the exhaust stops. I tighten the cam down, hissing begins and leakdown goes back up to 90%. From this point, I'm learning that my lifters are causing a condition to keep my valves open...huh? Do any of you guys have experience with this type of thing? Heads were street ported by EPR, valves were done by local machinist. Installed myself. At this point, before I can even start swapping coils and plugs around to the driver side to move the misfire condition, I need to get compression back to #5. Currently I have the exhaust cam lobe on full compression on both cyl 5 lifters to try and bleed them, but I'm at a bit of a loss. Thanks for your help, if there needs to be anything clarified I will try to the best of my ability. I'm leaving a good portion of stuff out to keep this short but at this point I'm looking for input on anyone that has had anything similar happen to them.
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