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Ford OBD1 Systems<br />
ADDITIONAL TESTS FOR EEC-IV SYSTEMS - CYLINDER BALANCE TEST<br />
and at every engine revolution. On other systems the injectors fire in<br />
groups and/or at every other engine revolution. What distinguishes<br />
Sequential Electronic Fuel Injection systems from other multi-port fuel<br />
injection systems is that each injector is independently energized and<br />
fires sequentially one after the other in the proper firing order. This gives<br />
the vehicle's computer more control to cut the fuel to one injector at a<br />
time (this can't be accomplished on the other systems because they fire<br />
in groups of two ore more injectors).<br />
Cylinder Balance Test Procedure<br />
Check your vehicle thoroughly before performing any test. See<br />
BEFORE YOU BEGIN on page 18 for details.<br />
ALWAYS observe safety precautions whenever working on a<br />
vehicle. Read and follow Safety Precautions on page 3 before<br />
performing this test.<br />
1. Locate the vehicle's Data Link Connector (DLC). See Data Link<br />
Connector (DLC) on page 77 for connector location.<br />
Some DLCs have a plastic cover that must be removed before<br />
connecting the CanOBD2&1 <strong>Scan</strong> <strong>Tool</strong> cable connector.<br />
2. Connect the CanOBD2&1 <strong>Scan</strong> <strong>Tool</strong><br />
cable (with the Ford Connector Cable<br />
Adaptor attached) to the CanOBD2&1<br />
<strong>Scan</strong> <strong>Tool</strong>, then connect the adaptor to<br />
the vehicle's DLC. Press the<br />
POWER/LINK button to turn the<br />
CanOBD2&1 <strong>Scan</strong> <strong>Tool</strong> ON, then press<br />
the ENTER/LD button to continue.<br />
� The Ford EEC-IV System menu displays.<br />
Use the<br />
selections.<br />
and buttons, as necessary, to make menu<br />
3. From the Ford EEC-IV System menu,<br />
highlight Cylinder Balance Test, then<br />
press the ENTER/LD button.<br />
� An “application” advisory message<br />
shows on the CanOBD2&1 <strong>Scan</strong><br />
<strong>Tool</strong>’s display.<br />
� If your vehicle IS equipped with the<br />
Sequential Fuel Injection, press the<br />
ENTER/LD button to continue.<br />
� If your vehicle IS NOT equipped with Sequential Fuel Injection,<br />
select Back, then press the ENTER/LD button to exit the<br />
Cylinder Balance Test.<br />
4. When prompted by the CanOBD2&1 <strong>Scan</strong> <strong>Tool</strong>, start and warm-up<br />
engine to normal operating temperature. Press the ENTER/LD<br />
button to continue.<br />
CanOBD2&1 89
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