4.17
FUEL INJECTION
4
• Remove cover and disconnect throttle cable from
throttle cam.
• With engine off, back out air flow screw until it no
longer is in contact with throttle plate cam. The throttle
plate should seal off throttle bore completely.
• Open and close throttle plate a couple of times to ensure
full throttle closing. Do not snap closed, as this could
cause unnecessary throttle plate to throttle body
interference and/or damage.
• Set up the TPS Test Adapter Harness (PU-47082)
according to the instructions. Verify that the 9 volt
battery is new. Figure 2.
• Using a voltmeter attached to the TPS Tester Harness
(PU-47082), check the voltage output of the TPS. It
should read .528 .01 volts.
• If it does not read .528 .01 volts, loosen the screw
holding the TPS to the throttle body. Rotate TPS until
voltmeter reads .528 .01 volts.
• Retighten TPS mounting screw, and verify the voltage
did not change. If changed, repeat the previous steps.
STEP 2
Establishing correct flow: Now that the zero offset voltage has
been set, you can now set the throttle body to the correct air flow
value.
• With voltmeter still attached to the TPS Test Adapter
Harness (PU-47082), turn the air flow adjustment
screw until the voltmeter reads .710 .01 volts. The
throttle body is now adjusted to the correct flow value
Figure 3.
• Reconnect the TPS harness lead
• Reinstall throttle cable on throttle cam and install cover.
Adjust cable freeplay.
Back Air Flow Screw Out Until No
Contact is Made
TPS Tester Adapter
Harness- PU-47082
Fig. 2
.528
Should Read: .528 V
Turn Air Flow Screw In
TPS Tester Adapter
Harness- PU-47082
Should Read: .710 V
.710
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