I recently swappeded the engine in my Camaro
RS from 305 to 350, although I've worked out most of the bugs, I am still receiving a code
43 from the ECM. I've replaced the knock sensor and checked the associated wiring, but after 15-25 minutes of actual driving
the code re-appears and the vehicle goes
into the limp home mode. I've attempted
to recreate the problem by varing the rpm while the vehicle is sitting still but the
problem seem to appear only when the vehicle
is in motion. Is it possible that the engine
timing is off and if so can engine diagnostics discover the source of the problem?
your problem sounds hairy.yes
it could be anything associated with the
change over ,was it there before or
maybe not , 305 and 350 run at 0,4,6,8
degees depending on application.check spec comparison with input and output parameters.
the knock sensor problem could be a
open ckt wire,bad ground ,ckt wire
shorted to ground ,faulty connection at e.s.c
module or faulty e.s.c module
best to use scan tool during diagnosis.........
more came to mind
low coolant level,loose water pump belt,
restricted air flow to rad or restricted
rad,faulty or incorrect t-stat,coolant sensor
nfg or out of range,fuel octane,computer prom,
low fuel pressure,spark plug heat range,
tranny shift points,tcc operation,
incorrect engine parts ie: cam , heads pistons,carbon on pistons,oil getting into
combustion chamber,restriction at converter.
knock is caused by alot................