a 1919 YJ?? They were really ahead of the times on that one.....:rof::rof:
(1993 is what I think he meant)
Yah, yah.... Another Senior Moment from the Old Guy. Thanks for jumping right on that............. No, really...........Thanks..................
Yes, a 1993 YJ... You guys are killing me....
In truth, the F/IC can not possibly care less about which controller it is wired into. It just processes the signals it gets per it's programming. Given that
all engine computers operate on TTL voltages (+5VDc) it matters not what computer it is wired into.
Easy to install if you can solder and even easier to program. I run my programs in "percent" mode as
I find it easier. If the mixture has an AFR of 13 and it needs to be 14.7, then a correction of 88.43% of the current cell value is the new number. The math is easy, in this example, 13/14.7*current value = new value for that cell location. Values lower than 14.7 indicate a rich mixture and higer than 14.7 a lean mixture. If you are going to err. err on the rich side as a lean engine, under boost, is a bomb getting ready to explode.
The fuel values in the table will, most likely, all be negative depending upon the size of the new injectors installed. It is a certainty that the ignition table will only contain Zeros and negative numbers. It is
impossible to advance the spark with a F/IC, only retard it. Which is what you want under boost. Rule of thumb being one degree per pound of boost.
The only "tricky" portion of the F/IC programming is the pressure reference. The F/IC operates, as does the stock PCM for that matter, in PSIa. This is pounds per square inch, absolute. Not gauge pressure with is a relative measurement. Still, it is easy once the concept is grasped. Sea level is 14.7 PSIa on average. Up here where I live, the ambient average is closer to 12.5 PSIa. But then, I live above 6,000' altitude.
For interest reasons only... At sea level, when a pressure gauge on an air compressor is reading 100PSIg, the absolute pressure is 100 plus the current ambient. Given that 14.7 is the "norm, then the absolute pressure in this example would be 114.7 PSIa. PSIg = gauge pressure.
But... Ambient pressure changes constantly with the weather. I.e. low and high pressure weather cells alter the ambient hour by hour.
But, back to the OP question, here is what I believe to be an accurate wire listing:
Signal Name PCM Connector Pin Wire Color Connection Type
Crank Shaft Position 24 Grey/Black Interrupt
Camshaft Position 44 Tan/Yellow Interrupt
Injector 1 16 White/Dark Blue Interrupt
Injector 2 15 Tan Interrupt
Injector 3 14 Yellow/White Interrupt
Injector 4 13 Light Blue/Brown Interrupt
Injector 5 38 Pink/Black Interrupt
Injector 6 58 Light Green/Black Interrupt
Switched 12VDc XX Need to verify Tee
Throttle Position 22 Orange/Dark Blue Tee
Power Ground 11 Black Tee
Power Ground 12 Black Tee
Signal Ground 4 Black/Light Blue Tee
This needs to be confirmed. I found it lurking in my F/IC folder her on my computer. As the file name is "YJ Wire List" I suspect it to be accurate as I did wire the YJ in question...
But, please confirm prior to usage.
Hope this helps.
