Quote:
Originally posted by MdFormula350
I have deleted egr, a.i.r, cats, and evap stuff, so i need to make some changes to improve things.
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It looks like it is running ok but a little on the rich side. BLM numbers drop to 115 area in spots but overall stays within the ECM control range. (Don't get limited by hitting the end of the scale at 108)
Removing the cat is probably the biggest contributor to the failure.
Don't know what else to say except some advice I received here when trying to get a car to pass.
Decreasing timing will help burn the fuel but that will cause your slightly rich condition to get slightly worse. Additional timing will require more fuel to get performance but emmisions suffer. Retard it until you feel a loss of power. It will not be what you want but it MAY pass then.
Replace your o2 sensor with a good one to be sure the readings are not skewed. retard the timing "slightly" may help but beware of the above condition.
Change plugs, cap, rotor, OIL, and do some more logging while reducing timing.
Do it one step at a time (change parts then change o2 sensor, then make timing adjustments) and watch the logs for BLM changes (if you get it to display) so you can see what makes the changes you are looking for.
If BLMs go to 108 you are out of adjustment room and you would have to lower your fuel pressure to get back into range. (or raise the timing that will hurt your emmisions)
It will take some doing to make it pass without the equipment installed.
Do a search and look for the chart of AFR to emmision gasses. By the numbers on your report you can estimate what needs to be done.
Jp
