I hear what seems like detonation.
A little history, I have done a bunch of work to this engine. Front crank seal, oil pump seal, dist seal, new wires, plugs, cap, rotor, valve cover gasket, spark plug seals, all vacuum hoses.
PAIR and EGR delete. TB cleaned along with intake manifold. O2 sensors good, 1 new one. Injectors cleaned and flow checked by local shop installed with all new seals.
Base timing as per fsm set to 3 degrees.
TPS, when set where it use to would cause about 800 rpm idle. When I adjusted it just a bit it idles at 650!
I set the base timing to 0 and still sounds like detonation.
What I am hearing: at about 1500 when accelerating I hear a not loud subtle rattling sound, rapid in pulse. If I slowly apply throttle I can increase speed and not hear the sound, but if I put my foot into it the detonation returns, so it’s a load related sound and not a RPM based sound.
Reading the FSM to adjust the TPS they talk about applying vacuum to the “throttle opener”. Where is or what is this? I see a dashpot but throttle opener?
Any ideas? Thanks!
A little history, I have done a bunch of work to this engine. Front crank seal, oil pump seal, dist seal, new wires, plugs, cap, rotor, valve cover gasket, spark plug seals, all vacuum hoses.
PAIR and EGR delete. TB cleaned along with intake manifold. O2 sensors good, 1 new one. Injectors cleaned and flow checked by local shop installed with all new seals.
Base timing as per fsm set to 3 degrees.
TPS, when set where it use to would cause about 800 rpm idle. When I adjusted it just a bit it idles at 650!
I set the base timing to 0 and still sounds like detonation.
What I am hearing: at about 1500 when accelerating I hear a not loud subtle rattling sound, rapid in pulse. If I slowly apply throttle I can increase speed and not hear the sound, but if I put my foot into it the detonation returns, so it’s a load related sound and not a RPM based sound.
Reading the FSM to adjust the TPS they talk about applying vacuum to the “throttle opener”. Where is or what is this? I see a dashpot but throttle opener?
Any ideas? Thanks!