gnjones231
Member
- Joined
- May 25, 2001
Let's see if I can peel back this onion. Only one question for Earl. Tell me exactly when the injector fires.
I think Earl may have missed my response. No matter. Here are two scope waveforms showing what happens to the injector firing point as a function of changing
the cam sensor timing. So, in a nutshell, you can't change when the injectors fires. It always fires on the negative edge of the crank signal.
The top dark blue trace is the cam signal. the middle aqua trace is the crank signal, and the bottom purple trace is the injector signal. Note the falling edge of the cam
signal in relation to the rising edge of the crank signal. It has changed, but also note that the injector signal is still starting on the negative edge of the crank signal.
I think Earl may have missed my response. No matter. Here are two scope waveforms showing what happens to the injector firing point as a function of changing
the cam sensor timing. So, in a nutshell, you can't change when the injectors fires. It always fires on the negative edge of the crank signal.
The top dark blue trace is the cam signal. the middle aqua trace is the crank signal, and the bottom purple trace is the injector signal. Note the falling edge of the cam
signal in relation to the rising edge of the crank signal. It has changed, but also note that the injector signal is still starting on the negative edge of the crank signal.
...Here's a little trivia question for everybody. There are only two instances where batch mode is used (as far as I know). One is for starting the motor, what or when is the other
one?
Here's a little trivia question for everybody. There are only two instances where batch mode is used (as far as I know). One is for starting the motor, what or when is the other one?
When no chip is present in the ECM? I know they do still run then but on very basic parameters.