Mark W
Yep, I really don't really care that much I guess.
I have not looked real real close at every post in this thread. But...
How exactly is it running poorly? From what I did see here, currently it idles okay, and at light throttle/low speed it is okay? At heavy throttle/high speed it lacks power, stumbles/bogs?
The "brain" (if we are to glorify it that much) knows very little about anything but the electronic/ignition side of things. In other words, it knows very little about the fuel. Zero really, unless things are so lean/rich as to show up in the O2 sensors. There is no fuel pressure sensor or any way for the ecu to know what the fuel flow is. It can only detect a bad injector if it is so bad that the O2 sensor sees the result. and the O2 sensor is looking at the totality of the exhaust, not any single cylinder.
There is not a "cold start" injector to richen the overall mixture up like there was in the 3FE. The ecu simply richens via the normal fuel control process (injector opening duration and fuel pressure). Once the engine is warm, it settles into the normal air fuel ratio targets.
One possibility... *IF* you have a bad injector, the richer mixture when cold can mask this. Once normal operating temps/settings are reached, this bad injector may be leaving a cylinder too lean, resulting in a dead miss on that cylinder, or a cylinder that sorta kinda pulls it weight at lower speed and lighter load, but just can't get the fuel it need to participate in the fun and games when things speed up.
Just a possibility to keep in mind.
Mark...
How exactly is it running poorly? From what I did see here, currently it idles okay, and at light throttle/low speed it is okay? At heavy throttle/high speed it lacks power, stumbles/bogs?
The "brain" (if we are to glorify it that much) knows very little about anything but the electronic/ignition side of things. In other words, it knows very little about the fuel. Zero really, unless things are so lean/rich as to show up in the O2 sensors. There is no fuel pressure sensor or any way for the ecu to know what the fuel flow is. It can only detect a bad injector if it is so bad that the O2 sensor sees the result. and the O2 sensor is looking at the totality of the exhaust, not any single cylinder.
There is not a "cold start" injector to richen the overall mixture up like there was in the 3FE. The ecu simply richens via the normal fuel control process (injector opening duration and fuel pressure). Once the engine is warm, it settles into the normal air fuel ratio targets.
One possibility... *IF* you have a bad injector, the richer mixture when cold can mask this. Once normal operating temps/settings are reached, this bad injector may be leaving a cylinder too lean, resulting in a dead miss on that cylinder, or a cylinder that sorta kinda pulls it weight at lower speed and lighter load, but just can't get the fuel it need to participate in the fun and games when things speed up.
Just a possibility to keep in mind.
Mark...
