how does the speed density work?
it seems like some of the lines tie into the egr setup?
and hte egr looks like a pain, I just want to deleate it..

are they tied or seperate?

If you delete the EGR you will have crappy throttle response. Other than that, the engine will run. I would recomend leaving the EGR alone;)

i'm installing a spd. density 5.0 in my ranger/b2 . from the tech i read off of www.50tech.com and www.corral.com you need to leave the egr. some ports can be blocked. i barely understand it , so it would be impossible to explain. but the above sites are good to bookmark for info.
shon

MY EGR IS GONE NO PROBLEMS AT ALL I USED THE BBK SPACER BETWEEN THE UPPER AND LOWER HALFS THAT BLOCKS OFF THE EGR. THEN I REMOVED THE EGR FOR MORE ROOM IN MY FLATTY.THE LINES THAT CONNECT TO THE EGR ARE FOR HOT WATER TO MOVE THROUGH IT

thanks for the sites.

ok can anybody give me a rundown of how the speed density works?

I.E judges air thickness and speed to learn how much fuel etc...?

Originally posted by 1SAWB
MY EGR IS GONE NO PROBLEMS AT ALL I USED THE BBK SPACER BETWEEN THE UPPER AND LOWER HALFS THAT BLOCKS OFF THE EGR. THEN I REMOVED THE EGR FOR MORE ROOM IN MY FLATTY.THE LINES THAT CONNECT TO THE EGR ARE FOR HOT WATER TO MOVE THROUGH IT

are you running SD?

Originally posted by Moab Austin
thanks for the sites.

ok can anybody give me a rundown of how the speed density works?

I.E judges air thickness and speed to learn how much fuel etc...?

Speed-density basiclly works by measuring manifold absolute pressure(the MAP sensor) air temperature(the IAT sensor on Fords) throttle position, engine rpm, and volumetric efficiency (a constant for a given engine. No sensor) to calculate the amount of air going in to the engine at any given time. The PCM then adjusts the pulse width of the fuel injectors to deliver the proper amount of fuel to the cylinders. The O2 sensor verifies that the calculations are correct and the PCM uses the O2 sensor results to modify its calculations. This is known as fuel trim. Ford's speed density systems can adjust about 25% rich or lean from baseline. These sytems count on the the dilution of of the EGR system in their calculations. Removing the EGR and the EVP sensor that is attached to it will cause the PCM not only set codes, but will throw the fuel calculations off. It may still run O.K. because the PCM will adjust the fuel trim, but the engine will get alot worse milage, and may not be able to further adjust fuel trim for other factors such as altitude or engine mods.