Quote:

Just recently when we start up the diesel it high idles anywhere between 1200~1400 rpm. The temperature gauge stopped working as well.
Any ideas on where to start looking for the problem ????????
Also, this is a stock cummins




Yeah, start with the obvious, the temp sensor.


"Follow me the wise man said, but he walked behind"


'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost conversion.
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.