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customer; products that perform properly and satisfy your expectations. Should you need information or parts assistance,
please contact our technical service department at 1-270-781-9741, Monday through Friday, 7 a.m. to 5 p.m. CST. Please have
the part number of the product you purchased when you call.
WARNING!
The MPI PRO-JECTION systems consist of a number of sophisticated components. Failure of any
one component does not constitute, nor does it justify, warranty of the complete system. Individual
service items are available for replacement of components. If assistance is required or if you need
further warranty clarification, you can call Holley Technical Service at the number shown above.
WARNING!
To preserve warranty, these instructions must be read and followed thoroughly and completely before
and during installation. It is important that you become familiar with the parts and the installation of
the MPI PRO-JECTION system before you begin. Failure to read and understand these instructions
could result in damage to PRO-JECTION components that are not covered by the warranty and could
result in serious personal injury and property damage.
WARNING!
For closed loop systems using an oxygen sensor, use only unleaded fuels with this product. Use of
leaded fuels will destroy the oxygen sensor and will result in incorrect exhaust gas oxygen readings
and improper fuel delivery. Failure to follow these directions does not constitute the right to a warranty
claim.
WARNING!
Failure to follow all of the above will result in an improper installation, which may lead to personal
injury, including death, and/or property damage. Improper installation and/or misuse of this or any
Holley product will void all warrantees.
WARNING!
Use of some RTV silicone sealers will destroy the oxygen sensor used with this product. Ensure the
RTV silicone sealant you use is compatible with oxygen sensor vehicles. This information should be
found on the oxygen sensor package.
2.0 BEFORE YOU BEGIN
Fuel injection systems have proven to increase engine performance by allowing the engine to operate to the best output it is
capable of producing. Make sure your engine is in good basic running order before installing the MPI PRO-JECTION fuel
injection system.
Anything that increases the power of your engine demands more from all the components and systems. If your engine is in poor
condition before you begin this installation, you won't get the results you want.
Fuel injection is more efficient, but also less forgiving than a carburetor. A properly tuned EFI system can disclose hidden
problems your carburetor may have concealed. Corroded terminals or a weak battery, alternator or ignition system will not
adversely affect your carburetor, but they will interfere with the precision functions of an EFI system.
The engine cooling system must have a working 140°F to 210°F thermostat. The intake manifold needs to be hot enough to
completely vaporize the injected fuel.
3.0 WARNINGS, NOTES AND NOTICES
WARNING!
For the safety and protection of yourself and others, the installation, adjustment, and repair must be
performed only by a trained mechanic having adequate fuel system experience. It is particularly
important to remember one of the very basic principles of safety: fuel vapors are heavier than air and
tend to collect in low places where an explosive fuel/air mixture may be ignited by any spark or flame
resulting in property damage, personal injury and/or death. Extreme caution must be exercised to
prevent spillage and thus eliminate the formation of such fuel vapors.
WARNING!
These instructions are provided as a general guideline for installation. Each user must use his own
judgement to determine whether his own, or the engine's safety will be endangered by any procedure
selected. The user should consult factory engine manuals to ensure compliance with fastener torque
and other important specifications unique to each engine.
WARNING!
This type of work MUST be performed in a well-ventilated area. Do not smoke or have an open flame
present near gasoline vapors or a explosion may result.
4.0 SKILL LEVEL REQUIRED
Installation of the MPI PRO-JECTION intake system and the ECU requires approximately the same level of skill and experience
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