dont be so dead set on " my lift pump is bran new"
i changed my IP and injectors(sticks) last year also changed LP, to a napa bought lift pump.
it would only give me 2 psi at idle.
the china made crap we get now a days are more faulty than a 30 year old lift pump.
this is why i switched to an electric pump (holley black pump w/ regulator)
dialed it back to 6 psi, and she ran like a obama supporter at a NRA convention.
also, get a fuel pressure gauge on your filter head. nothing like knowing your fuel pressure and moving forward with diagnostics.
i changed my IP and injectors(sticks) last year also changed LP, to a napa bought lift pump.
it would only give me 2 psi at idle.
the china made crap we get now a days are more faulty than a 30 year old lift pump.
this is why i switched to an electric pump (holley black pump w/ regulator)
dialed it back to 6 psi, and she ran like a obama supporter at a NRA convention.
also, get a fuel pressure gauge on your filter head. nothing like knowing your fuel pressure and moving forward with diagnostics.