Hi. I just recently purchased a donor car from a salvage yard for the motor and trans. The motor would not start in the donor car, thought it was a fuel issue. I proceeded to install these into my car, figured i would deal with these issues there where i was more familiar with everything else. The swap went fine, figured out there was no spark in this new environment. Got spark figured out, now it is missing on the #5 and #6 cylinders, seems mostly at low rpm, when you rev or put it under a load, not so noticeable. I have spark, I have fuel. I have changed the cap, rotor, plugs, plug wires, coil, and distributor itself, as well as the injectors and fuel rail. Still having the same problem, i tried to jump off of two other injectors to no avail. Have also changed the ecu. I have rather free exhaust (2 1/4 off of manifold, then stepped up to 3") and was wondering if this could be a back pressure problem, due to the not so wonderful design of our stock manifolds, or perhaps a bhg between these two cylinders, or maybe valve problems. Any thoughts or tips to get me pointed in the right direction would be greatly appreciated. Thank you
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