[cbileti12v]

hopeing someone can help give me some insight to my problem. i have a 97 12v with 281,000 mi. on it and dont know much about diesels. somtimes it idles well and and will suddenly drop and the voltage drops with the rpm's. if i turn on the a/c it will kill it. it also will not start without pressing the accelerator about 20%

 

[cbileti12v]

when it is in neutral it drops to 10 volts from 14 at about 450-500 rpms but most of the time willjump back to about 700 in 5 seconds the does it over and over. i bought a new filter yesterday and plan on changeing it tommarow.

 

[cbileti12v]

is there any way for me to test the solinoin or should i just replace it?