Keepinitoldskool
Well-Known Member
Background info:
5.4 with startup rattle, no power above 3500rpm
Replaced all 8 plugs with oe spec Motorcraft. Replaced clogged air filter.. replaced fuel filter both Motorcraft. Ran under load for fuel pressure test, ok. Replaced timing chain, tensioners, guides, phasers, solenoids with oe Ford parts. Replaced oil pump with Melling 340hv. Startup rattle is gone. Engine runs perfect until 3500. Discovered driver's side cat is clogged. Unclogged it, damaging b2s2 in the process. Engine runs awesome at all rpms until hot, bank 2 retarded. Code for b2s2 lean.
Pulled LH cover, cleaned solenoid. Same. Replaced oil and filter. Same. At low speed maneuvers when hot vct bank 1 goes 60° advance and bank 2 60° retard. Swapped cam sensors left to right. Same. What the hell why does one bank go advanced and the other retard at the same time? And only when hot????
5.4 with startup rattle, no power above 3500rpm
Replaced all 8 plugs with oe spec Motorcraft. Replaced clogged air filter.. replaced fuel filter both Motorcraft. Ran under load for fuel pressure test, ok. Replaced timing chain, tensioners, guides, phasers, solenoids with oe Ford parts. Replaced oil pump with Melling 340hv. Startup rattle is gone. Engine runs perfect until 3500. Discovered driver's side cat is clogged. Unclogged it, damaging b2s2 in the process. Engine runs awesome at all rpms until hot, bank 2 retarded. Code for b2s2 lean.
Pulled LH cover, cleaned solenoid. Same. Replaced oil and filter. Same. At low speed maneuvers when hot vct bank 1 goes 60° advance and bank 2 60° retard. Swapped cam sensors left to right. Same. What the hell why does one bank go advanced and the other retard at the same time? And only when hot????