Taurus L4-153 2.5L HSC (1986)
HARDSTOP (THROTTLE STOP ADJUSTING SCREW)
Exhibit 3
RPM SETTING PROCEDURE (CONT.)
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Turn the ignition key to "RUN" position. DO NOT START THE ENGINE. Emissions Recall 89E78
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The ISC plunger will retract in 5-15 seconds. Repair Code "B"
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Disconnect the ISC motor from the wire harness.
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Return the ignition key to the "OFF" position.
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Then remove the jumper wire.
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Turn the engine "ON".
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Warm up the engine to Normal Operating Temperature for 2-3 minutes.
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Turn all accessories off, check the hardstop RPM (cooling fan off) in Neutral (MTX) or Drive (ATX) for proper RPM's and the TV linkage
adjustment (ATX), see chart.
Applications
Hardstop Idle
EEC Controlled Idle
Manual Transmission
725 +/- 25
775 +/- 25
Automatic Transmission
650 +/- 25
700 +/- 25
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If TV linkage, on automatic transmission equipped vehicles, is out of adjustment, adjust using the following procedure before adjusting Hard
Stop-Idle.
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Loosen the bolt on the sliding trunnion block, on the TV control rod assembly, one turn minimum.
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Remove any corrosion from the control rod and free-up the trunnion block so that it slides freely on the the control rod.
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With trunnion block loosened, rotate the trans-axle control lever up using one finger and a light force, 4.5N (approximately 1 pound), to
ensure that the TV control lever is against its internal idle stop. Without relaxing the force on the TV control lever, tighten the bolt on the
trunnion block to 9-14 N-m. (7-11 lb. ft.) as shown below.
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Turn the throttle stop adjusting screw for hardstop adjustment.
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Turn the engine "OFF".
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Reconnect the ISC connector.
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Reconnect the air induction tube (flex tube) completely.
3.
Perform the EEC-IV Controlled Idle Learning Procedure
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Turn the engine "ON".
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Turn all accessories "OFF" [With the engine at normal operating temperatures and the transmission in Neutral (MTX) or Drive (ATX), idle
the engine for 2-3 minutes.]
