Tredia L4-1795cc 1.8L SOHC Turbo (1984)
Throttle Position Sensor: Technical Service Bulletins
Idle Quality/Driveability - Adjustment/Troubleshooting
SUBJECT:
CORDIA/TREDIA TURBO IDLE QUALITY AND DRIVEABILITY
NO.
STB-83-14-010
DATE
December, 1983
MODEL
1984 Turbo, Cordia/Tredia
In order to optimize idle quality and driveability of 1984 turbocharged Cordia/Tredia models, it may be helpful to pay special attention to the items listed
below.
ISC/TPS ADJUSTMENT - IDLE QUALITY
Be sure the Idle Speed Control and Throttle Position Sensor are adjusted as described in STB-83-14-009.
FUEL INCREASE SENSOR - COLD DRIVEABILITY
Since the fuel increase sensor pin is in the ISC connector, good cold driveability depends on the connector being properly connected.
TROUBLESHOOTING ROAD-LOAD SURGE
If you should encounter a road-load surge condition, check the following:
^
Is inlet air hose from turbo to mixer body misaligned or loose?
^
Is pressure exchange solenoid valve not operating properly?
^
Are spark plugs misfiring?
^
Is there excessive resistance or poor insulation in high tension cables?
^
Is O2 sensor not functioning or a poor connection?
^
Is air cleaner pressure nipple clogged or hose restricted?
^
Is EGR valve opening prematurely?
For more troubleshooting information, refer to the chart on page 14-10 of the Cordia/Tredia Service Manual.
