Quote:
Originally Posted by irvingj  It's a way to temporarily (a few seconds at best) bypass the normal fuel delivery system. One "shot" of spray will give the cylinder(s) enough atomized fuel to ignite and for the engine to run briefly.
It's simply a method of determining if the problem is in the fuel delivery system or not. If it fires up after spraying (but not before), it pretty well means the engine's NOT getting any fuel through the normal system. |
I concur. It's like giving a gas engine a shot of ether. Ether is not such a good idea with a diesel due to glow plugs, but WD-40 is just a really low quality oil (sorta like diesel) so you're just getting some fuel into the cylinders to see if it will run.
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The number below actually indicates hours per gallon, not MPG.
