all 4 cylinders on passenger side will not fire.
cap,rotor,wires,firing order, spark, its got it all correctly........ all 8 cylinders have 155-158 lbs. of compression. got another fuel injection module and still acts the same.
I'm convinced the 4 cylinders are not getting fuel. What other option do I have, as to what sensor regulates the injectors pulsing?These 4 cylinders aren't getting fuel fuel...

 

Need to know the year.

 

Sorry......... Its a 1995 Discovery, automatic, 3.9

 

OK, you have spark, fuel at the fuel rail but not firing on one side.
Man, the only thing that I can think of is that your plug wires are on wrong, but you said that was good.
So the next thing would be the crank sensor? Some say that the 3.9 doesnt have a crank sensor, I have a 4.0 so I do not know.
I am at a loss man, sorry.

 

assuming everythin you say is good, is good, youre looking at fueling, either a clog in the rail, or got some wires cut. pull a plug, and its wire off of the dist. crank it over, see if you have fuel vapor commin out... and honestly man, not that its bad, but those cyl. comp readings are kinda high for that engine, being that old at least. and you dont have a crank sensor, so dont worry about that.if you dont have any fuel, you need to either test your injectors or your rail by removing an injector

 

your surprise to the compression readings, pleases me... I had expected readings of 110 and got the 150 and better, so i guess, i'm doing good in one direction. thanks, i'm gonna break down the rail tommorw