Diesel pump timing white smoke

Injector pump timing The commonest cause of white smoke is likely injector pump timing. In order to function properly, a diesel engine needs precise timing of the injector pump and high pressure. So, any decrease in the pressure or delay in the fuel delivery to the combustion chamber will result in incomplete combustion, leading to white smoke.

White smoke generally happens when there is not enough heat to burn the fuel. The unburnt fuel particles blow out the tailpipe producing a rich, thick, diesel fuel odor. It is normal to see white smoke from the exhaust during sub-zero and colder weather, at least until the engine warms up.

As a general rule, the first cause of a diesel that’s blowing white smoke will be related to the injector pump timing. Diesels rely heavily on high compression and correct injector pump timing to fire the combustion cycle. Any reduction in the cylinder pressures or fuel delivery will result in an incomplete combustion process. Valve and fuel pump timing can be readily checked.

They can be taken to the local diesel shop and bench. Engine cranked up easy. I had no smoke at idle and a puff when revved. The pump turned out to have a leak dripping from the little black drain cap.

I removed the pump without taking the cover off sent it back and have reinstalled it and now I have a bunch of white smoke that burns my eyes at idle and when revving. This is particularly helpful on older diesels with manual injection pumps. Once you can say the timing is right than you can start checking injectors. Is it one puff of white smoke spaced out a little or a constant stream.

The More it is Off the more White Smoke and for longer Idle time. S8SGtoI have in my shop a very nice Mercedes W1turbo diesel station wagon that has recently had a rebuilt. The right amount of fuel and its timing are extremely critical because it regulates the combustion of fuel and the speed of the engine. Therefore, maintaining precise timing is important every time the timing belt of an engine has been replaced or adjusted.

HOWTO shows you this by explaining how to check fuel pump injection timing. When the timing is not what it’s supposed to be, your engine will essentially be running rich which will cause fuel to not completely burn and instead exit out of the exhaust as white or gray smoke. WHITE SMOKE occurs when raw diesel comes through the exhaust completely intact and unburned. Some causes of this include.

We got a Techunit to set the injection timing. We ohmed out the wiring, its OK. F and lower, the block heater MUST be plugged in 6-hours prior starting. If what you experience is within the above range, all is normal. Young or ol timing can be adjusted on any engine.

The only difference is how the timing will be adjuste which is covered later on in this article. Advancing the timing of an engine means that you are moving the combustion up in time. Excessive black smoke could result from restricted intake or exhaust, inoperative leaking or weak turbo (if equiped), intake manifold gasket leaks (turbo), leaking or worn injectors, fuel return or supply restriction, advanced injecion pump timing or defective injection pump.

This being said I have not personally tried wild with timing at 2. In this video we show you why!