3joh
TYF Newbie
05 Tahoe Z71 non Flex
New long block with approx 5K on the clock.
occasional symptoms:
hard start
rough idle
lack of power
intermittent knock sensor code, random misfire code.
Injectors have been replaced, throttle body cleaned, new wires, plugs, coils when engine was replaced.
The tahoe has 280k on the clock but in Florida looks like new with original paint and rust free chassis.
Original fuel pump
Fuel pressure measurements:
with engine running 60 psi and does not drop while increasing rpm's in neutral
with key on (engine not running) gauge reads 49 psi and within 1 minute is below 30. rapid drop
I am thinking original fuel pump needs replaced. Cannot see any external leaking on injectors. Injectors were replaced at 272 k miles with GM replacements.
Thoughts?
New long block with approx 5K on the clock.
occasional symptoms:
hard start
rough idle
lack of power
intermittent knock sensor code, random misfire code.
Injectors have been replaced, throttle body cleaned, new wires, plugs, coils when engine was replaced.
The tahoe has 280k on the clock but in Florida looks like new with original paint and rust free chassis.
Original fuel pump
Fuel pressure measurements:
with engine running 60 psi and does not drop while increasing rpm's in neutral
with key on (engine not running) gauge reads 49 psi and within 1 minute is below 30. rapid drop
I am thinking original fuel pump needs replaced. Cannot see any external leaking on injectors. Injectors were replaced at 272 k miles with GM replacements.
Thoughts?