Ok, as of now I have been working on my fuel system and I am in the process of testing everything. Now my question is this... In the workshop manual D:04:14 it states that if a DWELL meter is connected to the Diagnostic plug pin that is connected to terminal 17 of the ECU module (which is the orange wire) I can measure the pulses cycle signal off of it for the Frequency valve. I am doing that I am setting my DWELL meter to a 6-cylinder setting and I am reading it off the scale (high end)! I hear my frequency valve going also. If I am correct in assuming that the pulse signal measured from this point should be approx 45 degrees than something is wrong with my system! Could it be I have a faulty O2 sensor? a Rich CO mixture? I placed a meter on the O2 sensor to measure the voltage (mV) and I get a 700mV reading....I know normal operation should be around 500mV. I guess this means that I have a Rich CO setting then? I tried to "lean" it out...but it doesn't affect anything electrically (Duty cycle or mV reading on the meter from the O2). Is it safe to say that it's a bad O2 sensor? One thing I have not checked (which is my next test) is taking readings off the O2 sensor when the engine is cold (just started). I hope not since it's new. I am testing my CPR valve but so far it seems good (using a Bosch fuel pressure gauge). I have checked for vacuum leaks and I did not find any. I rechecked all of my vacuum hose connections and they are all going to the right places. The problem I am having is that the engine backfires in the exhaust when I rev the engine, that's why I am performing these tests. Timing is set at 13 degrees TDC, all new ignition components minus the coil. Fuel pressure measured from the center of the fuel distrib (where it goes to the CPR) 75lbs (5 Bar).