Would a restricted fuel return line cause a jumpy reading on a fuel pressure gauge? Needle is very jumpy with or without vacuum line hooked up. Pulsates along with the annoyingly loud ticking of the AFPR.

When the fuel pump primes, you can hear fuel "squirting sound". It runs great but sometimes at hard acceleration I can hear engine ping.

New Bosch3 injectors and AFPR
Fuel pressure key on: 43 (bleeds down in about a minute)

Spikes to 60 and drops when accelerating hard. Pulsating the whole time.

 

when you changed your fuel pump, did you do away with the pulsator? your bleed down rate suggests something is leaking.as for engine ping what gas do you use? where is your timing set?

 

I have an inline pump.. Timing is at 6*btdc. I use 89 octane..The pinging is rare. But when I was able to data log my blms were in the 150's.