740 L4-2.3L SOHC VIN 88 B230F (1985)
Technical Service Bulletin # 25202
Date: 910501
Throttle Switch/Mechanism - Adjust, Clean, Center
Model:
200/700/900
Group
25
Number:
202/704
Title:
Throttle Switch/ Mechanism - Adjustment, Centering/ Cleaning
200/700/900
Market:
US and Canada
Date: May 1991
Reference:
TP 31347/1 (English); 01/89; Regina Fuel System B230F
TP 31354/2 (English); 09/90; LH-Jetronic 2.4 B230F/FT, B234F
TP 31361/1 (English); 12/88; LH-Jetronic 2.4 B230F
This bulleting supersedes SB 23-137; 11/90.
This service bulletin describes fault-tracing procedures, corrective action, and a number of standard measures to be used when evaluating customer
reports of rough engine running. The procedures cover conditions related to incorrect adjustment of the throttle housing, switch or mechanism, or some
other fault in these components.
The following conditions must be satisfied to ensure that the problems are not attributable to sources other than the throttle housing, switch or
mechanism:
- Faults (if any) indicated by faults codes stored in the diagnostic system must be corrected and no new codes displayed.
- The engine can be started and the car can be driven, both with the engine cold and hot.
- The throttle cable is not too tight. The throttle pulley must be free to return fully to its stopped position.
- There must be no air leakage into the intake manifold.
- The ignition and fuel injection systems (and the EGR system if applicable) must be operating satisfactorily. Otherwise, faults in these systems can
cause uneven idling.
- Connectors and wiring must be properly connected and free of faults.
Note:
The throttle housing and plate will become dirty after a period of operation. This is normal and does not call for cleaning. Cleaning of the throttle
housing and plate should be carried out only if the plate requires centering.