1993 Dodge D350 cummins engine oil pressure gauge drops when you excelerate When you let off the excelerator the oil pressure goes back up Engine runs fine?
first off, has it been doing it ever since you got it...or did it just all of a sudden start happening... if it's a new problem, I'd have the oil pressure checked...also, is it charging ok(gauges)... also, the sending unit may be faulty at high oil pressures... got good oil? I recommend 20w-50 with LUCAS additive for just about any motor, especially a diesel....good luck:)
Black smoke is an indication of to much fuel or too rich a mixture,when flooring the excelerator you have a waste of unburned fuel,it is better to excelerate slower to give the engine a better chance to utilize the gas. you are burning off the carbon deposits inside the engone...flooring it is not a good idea nor is it good for the engine. The better way to clean the engine is to take it out…
Cummins (OEM) 12 valve (single wire) oil pressure sensor is located below the injection pump and could be in front of or behind injection pump support bracket. The location was determined by the factory installing the engine. Cummins (OEM) 24 valve (three wire) oil pressure sensor is located below the ECM.