Im new here, and been looking at this forum before and after a recent putchase of a 1993 F250 IDI. This is my first diesel, but not new to wrenching. It just developed an issue that manifests itself as a cyclycal high load dragging the voltage down. I see it turning on and off on the volt meter gage, and all the lights, cabin and head lights, dim with the switching on and off that correspondes with the volt meter fluctuations. A quick check by a parts store yielded the voltage regulator is bad, hence I changed the altenator. No change to symptoms. I read a post suggesting a faulty relay, so I changed the relay labeled engine management. No luck there. I installed new batteries and cable when I got it. It starts and runs great. The wait to start engine light takes about 15-20 seconds to turn off before starting, so that suggests at least some glow plugs are operaring correctly. If the culprit creates a high enough load to dim all the lights, maybe some glow plugs are switching on and off? This even happens ar highway speeds, 70mph, not just idle.
Any Ideas where and how I should begin trouble shooting? Thanks in advance for all suggestions.
Any Ideas where and how I should begin trouble shooting? Thanks in advance for all suggestions.