Successful Farming – August 2019

RAY BOHACZ

The SF Engine Man
Ray Bohacz has engine grease and field
dirt under his fingernails from a life spent
repairing vehicles and running a farm
in New Jersey with his wife, Charlotte.
His how-to articles also appear in Diesel
Power, Engine Professional, Hemmings
Motor News, and Speedway Illustrated
magazines. Contact Bohacz via email at
[email protected].

August 2019 | Successful Farming at Agriculture.com 29

or excessive engine
wear will occur.
A traditional
mechanical injec-
tion system can build
carbon deposits on
the pintle and impact
fuel atomization.
The HEUI system
is also susceptible
to that and sticking
on the oil side. The
lubricant side of the
injector will build
with gum and varnish
if the engine oil is not
changed regularly or
if a poor grade is used.
The result is a phe-
nomenon called stiction,
where the oil side of the
injector that creates the
fuel pressure rise skews.
The result is a poorly run-
ning engine.

excessive deposits

M

any neglected HEUI
injectors have exces-
sive deposits on the pintle
that skew fuel atomiza-
tion along with a lack of
response on the oil side.
This often produces
a hazing in the exhaust,

poor cold starting

and performance,

reduced power,

increased fuel con-

sumption, rough

idle, weak throttle

response, and an

exhaust note that

sounds like a con-

stant misfire.

There are

products that can be

mixed with the engine

oil to help remove the

varnish and restore

the injectors’ response.

They should be em-

ployed with a fuel-side

injector cleaner as part

of a preventive mainte-

nance program.

Unlike a mechanical

injector that can easily be

disassembled, cleaned, and

have the NOP set, for all

practical purposes, this can-

not be done to a HEUI.

There are shops that

claim to have the equip-

ment to service a HEUI.

More often, they just use an

ultra-sonic bath as would

be done with an EFI

injector in a gasoline

engine.

A LONG WAY

TOGETHER

BKT’s extensive product portfolio comprises

specific cutting-edge tire ranges to cater for

the most demanding needs in a variety of

fields such as agriculture, construction,

and OTR, as well as transport and

agro-industrial applications.

LOOKING BEYOND THE HORIZON

DECATUR, ILLINOIS

27-29 August 2019

BOOTH #511

VISIT US AT

BKT USA Inc.

2660 West Market St., Suite 100

Fairlawn (Akron) - OH 44333

Toll free: (+1) 888-660-0662 - Office: (+1) 330-836-1090

Fax: (+1) 330-836-1091