seanyb505 wrote:Please forgive my ignorance, but what exactly are the differences between open and closed loops, and when exactly do they happen?
When it is in open loop the ecm makes fuel trim decisions by several sensor of the eng............when it is closed loop the 02 sensor tell the ECM how good of a job it is doing(aka closed loop)......TOO lean!!!!!!!...ecm ADJ, TOO rich!!!!! ecm ADJ. and this proses never stop unless it gos back in to open loop.
the 02 sensor is continually telling the ecm how to do its job better.
Make Sense?
Flash
89 XJ with 300,000 on the original eng
"I've also never completed a motor, yet. My mouth (fingers) is also writing checks my ass can't cash."
How are you guy's adjusting the ignition timing on your stroker conversions? Is anyone running the coil on plug system that comes on the later model engines? Would you like to?
Remember, Sometimes I post after drinking!
1979 AMC Spirit
Building a Turbo 2.5
I am not very smart!
I let the ECU determine timing, as I have no way to adjust it. I am using the coil rail setup and it is working well so far.
Bratcop
2001 GC Laredo
4.5 Stroker, 9.6 SCR, 8.1 DCR
Stock Valvetrain
24# Cobra Injectors
Bored Throttle Body
CAI
Ported and Polished 0331 Head
SplitSecond PSC1-003 Piggyback
Zeitroniz WideBand O2 logger
(all of this is still in the works as we speak)
