HI, Need help badly. Have a 1986 ERST which has a tapping noise coming from the top end. have replaced the cam/lifters/arms but its still there, lifters always noisy to start with but then quiet down after 4-5 mins so you can hardly hear them. then as soon as you pull away the noise comes back even louder!!!! can cruise along at 50mph and no noise until you accelerate again.. anyone have any ideas... blew turbo and head gasket replaced with stage 3 head/replaced sump gaket/ added oil pressure gauge/sender on oil filter. Oil pressure at 80psi on startup the down to 30 on idle the 40ish when driving!!!! run great for first week now this new noise!!!!!!!!!!!!

1986 ERST.
Pace Intercooler.
Ahmed Bayoo Chip.
Bailey Dump Valve.
Kent CVH35 Cam.
Power Engineering Stage 3 Head.
Magnex Exhaust.
Mahale Pistons.
Turbo Technics turbo.
Magnecor Leads.