Hello, i have a 95 psd, and it only has 130k on it. never had any issues til yesterday morning when i was fast idling it, then it started to idle really rough, check engine light came on and it wasnt charging. I shut it off, started it back up, then it cleared up and ran fine the rest of the day but it seemed he chip wasn't working at first. (TS chip-75 hp i think is the max). Well i went to leave this morning, and almost immediately after starting it, it did the same thing (rough idle, check engine light is on, wasn't charging, and wouldnt take fuel at all-it just spit and sputtered worse). Does anyone have any ideas? I changed the fuel filter only 4,000miles ago, this is a daily work truck that i tow with about 400-500 miles a day average. I even cleaned the little screen last night that bolts to the side of the fuel filter housing (very dirty), cleaned the air filter and test drove it last night and it ran great! Sorry for so long, thanks for any tips, i have to get this thing fixed ASAP!

 

Get the truck scanned for the code... Anytime the CEL comes on, A code has been stored. That will help you diagnose the issue...