Cleaning Your diesel engine

[Dom Ferris]

My engine is starting to accumulate diesel residue and I'd like to air spray it with some type cleaner/solvent.

In the past I've used Varsol to clean aircraft and auto engines with great results - but it doesn't have much affect on diesel fuel.

Looking for a product that won't hurt wiring, hoses, etc.
So far I've only tried the Varsol but thought I'd ask here before I went further.

Thanks in advance for any advice.