hey guys ive been working on this truck for a while now and i cant get to fixing it.
1990 ford ranger 2.3L 5 speed
the problem is that my egr
solenoid isnt opening i got a code for it and my check engine light comes on 5 minutes after turning the truck on every time once i turn it off it goes away then comes back on.
i know that my egr
valve is working, i already took it off and cleaned it throughly and seems fine. i found out when i removed the vauum line to the solenoid that there was no vacuum when i accelerted the truck. so that lead me to the egr
solenoid. there is vacuum comming to the solenoid but solenoid isnt opening. ive tested 3 other solenoids and the same thing.
now im wondering how the solenoid works?
im thinking that it has constant power and the ecm
controls the ground by pulse width modulation...
i checked voltage and im getting constant 13-15v when running
i check ground im also getting same voltage which means i have no ground.
i also did a voltage drop on the solenoid and im not getting anything
i went ahead and checked on the ecm
terminal and same thing 14v comming in when running...
meaning its not operating hence no ground. so the only thing left to say is that there is an open ground or a fault internally in the ecm
can anyone give me any other option or any other info on what else to test?
i know egr
operates at past 2000 rpms and when engine is at op. temperature.