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spankyjr1
spankyjr1, Journeyman
Category: Construction and Road Equipment
Satisfied Customers: 2595
Experience:  I worked on all types of equipment semis,forklifts,farm,ect.
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HAVE A S185 BOBCAT, FITTED NEW HEAD , WHEN STARTED, RUNNING

Customer Question

HAVE A S185 BOBCAT, FITTED NEW HEAD , WHEN STARTED, RUNNING ROUGH AND BLOWING BLACK SMOKE, SMOKE CLEARS AND ENGINE SMOOTHS OUT WHEN NO.2 INJECTOR LINE LOOSENED, ANY ADVISE WELCOME. SCOTT.
Submitted: 1 year ago.
Category: Construction and Road Equipment
Expert:  spankyjr1 replied 1 year ago.

Hi Scott,

Swap #2 injector with any other and see if the miss moves with injector.

Checking injectors does not always determine if they are good or bad, it sounds as if the internal check valve in injector is stuck open overfueling cylinder, swapping injectors will verify.

Look for a cracked tip on injector ,black smoke is overfueling and will cause your symptoms.

Customer: replied 1 year ago.
ALREADY HAVE STAYS AT NO.2
Expert:  spankyjr1 replied 1 year ago.

Check compression on #2 and any other and compare readings.

do you have any blow by when all injectors are firing?

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