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Interceptor Manual

Table of Contents

Introduction........................................................................................................................................3

What is an interceptor?....................................................................................................................3

Why does the factory ECU need to be retuned?............................................................................4

How does the Haltech Interceptor Work?......................................................................................5

Fuel Control.................................................................................................................................5

Ignition Control...........................................................................................................................5

Fitting and Tuning a Haltech Interceptor .....................................................................................7

Fitting a Haltech Interceptor ...........................................................................................................7

Tuning a Haltech Interceptor..........................................................................................................8

Basic Fuel Tuning .......................................................................................................................8

Closed Loop Mode......................................................................................................................8

Basic Ignition Tuning..................................................................................................................9

Knock Control .............................................................................................................................9

Diagnostic Scan Tools.................................................................................................................9

Haltech Interceptor Software ........................................................................................................11

Installation......................................................................................................................................11

Starting the Software and going online ........................................................................................13

Saving and Loading files...............................................................................................................15

Tuning and Navigating through the Front end ............................................................................16

Wiring Diagram...............................................................................................................................17

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Summary of content (17 pages)

PAGE 1
Interceptor Manual Table of Contents Introduction........................................................................................................................................3 What is an interceptor?....................................................................................................................3 Why does the factory ECU need to be retuned?............................................................................4 How does the Haltech Interceptor Work?.......................
PAGE 2
PAGE 3
Interceptor Manual Introduction What is an interceptor? Haltech has been in the aftermarket ECU business for over a decade offering fully programmable replacement ECUs that completely replace an engine’s factory ECU or carburettor system. Haltech’s ECUs are high quality programmable ECUs that can be setup to run any engine at optimal tune. For many years, this has been the preferred method of achieving consistent accurate tuning in a modified engine.
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Interceptor Manual Why does the factory ECU need to be retuned? All factory ECUs control the amount of fuel injected into an engine, as well as the ignition timing of the engine. In addition, many factory ECUs also control features like turbo boost pressure, variable cam timing, and many other modern engine features that affect engine performance.
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Interceptor Manual How does the Haltech Interceptor Work? All factory ECUs will have a sensor used to calculate engine load, and a sensor used to track engine position. The engine load sensor (in order of highest to lowest preference) is usually an airflow meter (AFM), a manifold absolute pressure (MAP) sensor, or a throttle position sensor (TPS).
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Interceptor Manual The Haltech Interceptor contains another table that works in a similar fashion to the table used for altering the engine load sensor described above. The tuner edits this table to provide ignition corrections over various engine load and RPM sites. The interceptor alters the engine position signal by the amount it extrapolates from the table. In this way the tuner can optimally tune the engine to the desired ignition timing.
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Interceptor Manual Fitting and Tuning a Haltech Interceptor Fitting a Haltech Interceptor From the outset, the Haltech Interceptor was designed to be simple and quick to fit and tune. To this end, Haltech has adopted an approach where all currently supported vehicle types can be fitted and started by simply wiring the interceptor using a vehicle specific wiring diagram, and then loading the Haltech Interceptor with a vehicle specific default map.
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Interceptor Manual Tuning a Haltech Interceptor Tuning a Haltech Interceptor is quite different to tuning a standalone ECU. Although the theories for tuning remain the same in terms of tuning each load point for desired fuel mixture and ignition timing, the response of the factory ECU to Haltech Interceptor changes can be quite different. This section sets out to detail the recommended methods and potential issues that should be considered when tuning an interceptor.
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Interceptor Manual made, resulting in the factory ECU base maps being well away from the required stoichiometric fuel mixture. Modifications that would likely cause this are: larger injectors, higher fuel pressure, modified cams etc. Basic Ignition Tuning Haltech Interceptor ignition tuning is quite consistent in its response across all vehicle applications. The units in the internal tables are in degrees that are then added to the ignition timing generated by the factory ECU ignition tables.
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Interceptor Manual • Fuel Mode – Often a parameter is available that indicates if the ECU is in closed loop mode or open loop mode. This aids in preventing factory ECU errors resulting from applying inappropriate corrections whilst in closed loop mode • Long Term Fuel Trim – Often factory ECUs monitor the closed loop control corrections, and if they average away from 0%, a long term fuel correction is added to enable the closed loop to work with a base injection time that is close to correct.
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Interceptor Manual Haltech Interceptor Software “A quick guide” This guide is not a full software manual. It is intended to get the tuner up and tuning quickly. Once the basics of the software operation are known, further details can found in the online help built into the software. Installation To install the software insert the Haltech Interceptor CD into the computer. The CD should start automatically.
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Interceptor Manual To start the software installation click on the software tab, and this will present the following screen. To start the process of installing the software, select “Run this program from its current location” and click OK. This will start the install shield and the user can just follow the prompts to install the software.
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Interceptor Manual Starting the Software and going online To start the software, double click on the Haltech Interceptor Programmer Icon. This will display the following screen: To bring the Haltech Interceptor online the user must first ensure the interceptor has power and the communications cable is connected.
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Interceptor Manual The front-end software uses Com Port1 as the default communications port. Should there be a need to select another com port, for example if the computer has no RS232 port and a virtual USB RS232 port is being used, then the user can select the desired Com Port in the Comms->Comms Setup menu. This needs to be done when the Haltech Interceptor is offline. If the user needs to reset the Haltech Interceptor, for example after a setup change, the user can select Comms->Reset ECU.
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Interceptor Manual Saving and Loading files To load information into the interceptor the user has two options. Firstly the user can select File->Open to load a file of their choice in familiar windows manner. This will load a new file but prevent accidental overwriting of the same map file name. If the user desires to reload the same file they can force this by selecting File->Load File.
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Interceptor Manual Tuning and Navigating through the Front end The interceptor program has been designed so that the user can navigate using only the keyboard. To navigate between the setup view and tuning view windows, the user can press the Tab key. To navigate through the setup menu the user can press the up and down arrow keys. Once the user gets to the desired item, the enter key is pressed to select that item. This will display the corresponding setup dialog box.
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Interceptor Manual Wiring Diagram 17