Briggs & Stratton BIG BLOCK EFI, Repair Manual

Page: 132 / 142

128 Section 5: Removal/Installation
14. Turn the engine off.
15. With throttle resting against the dead idle
screw, use the software to adjust the TPS
Sensor Actual voltage to 0.73 +/- .02 volts.
See H of Figure 5-24.
16. Alternately tighten two TPS screws to 10-
16 in-lbs (1-2 Nm).
17. Install access cover. See Access Cover/
Blower Housing, Installation, steps 7-10.
18. Proceed to step 26 to reset ECM memory.
Using DVOM
19. See Throttle Body, Installation, steps 1-4.
20. Run engine at no load idle, throttle in the
idle position.
21. Use index fi nger or plug to block IAC air
passage. See I of Figure 5-24.
22. While IAC air passage is blocked, adjust
dead idle screw until engine runs at 600 +/-
50 RPM.
23. Turn engine OFF and proceed as follows:
a. Back probe terminal 3 (Pink/Black wire)
of TPS connector.
b. Connect terminal 3 back probe to red
meter test lead on DVOM.
c. Back probe terminal 2 (Brown wire) of
TPS connector.
d. Connect terminal 2 back probe to black
meter test lead on DVOM.
e. Set DVOM to read volts DC.
f. Turn Ignition ON, Engine OFF.
g. Observe voltage on DVOM.
TPS
Removal/Installation/Adjustment
1. See Throttle Body, Removal.
2. Remove two Phillips screws to release TPS
from throttle body. See A and B of Figure
5-24.
3. Remove dead idle screw with spring from
throttle body. See C of Figure 5-24.
4. Mark throttle plate position for ease of in-
stallation. See D of Figure 5-24.
5. Remove two screws to release throttle
plate. See E of Figure 5-24.
6. Rotate throttle, so that lever contacts the
dead idle screw boss. See F of Figure 5-24.
7. Install two Phillips screws to fasten new
TPS to throttle body, but leave loose for
later adjustment. See G of Figure 5-24.
8. Apply Loctite 271 or equivalent to two
throttle plate screws. Install screws to fas-
ten throttle plate to throttle body. Alternately
tighten screws to 8 in-lbs (1.0 Nm).
9. Install dead idle screw with spring, but
leave loose for later adjustment.
NOTE: If ETA software is not available, use
DVOM and follow instructions beginning at
step 19.
Using ETA Diagnostic Software
10. See Throttle Body, Installation, steps 1-8.
11. Run the engine at no load idle, throttle in
the idle position.
12. Slew the IAC to 0 steps. See H of Figure
5-24.
13. Adjust the dead idle screw until the engine
runs at 600 +/- 50 RPM.