Mash Seventy - Page 201

Chapter 8 Information service Section 1Troubleshooting
8-7
Complaint Symptom and possible causes
Remedy
Enginerunspoorly
in high speed
range.
Defective engine internal / electrical parts
1.
Weakened valvesprings.
2.
Worncamshafts.
3.
Valvetimingoutofadjustment.
4.
Toonarrowsparkpluggaps.
5.
Ignitionnotadvancedsufficientlyduetopoorlyworkingtiming
advancecircuit.
6.
Defective ignitioncoils.
7.
Defective CKP.
8.
DefectiveECU
9.
Cloggedfuelhose,resultingininadequatefuelsupplytoinjector.
10.
Defective fuelpump.
11.
Defective TPsensor.
12.
Clogged air cleanerelement.
Defective air flow system
1.
Clogged air cleanerelement.
2.
Defective throttlevalve.
3.
Suckingairfromthrottlebodyjoint.
4.
DefectiveECU
Defective control circuit or sensor
1.
Low fuelpressure.
2.
Defective IATsensor.
3.
Defective CKP.
4.
Defective IATsensor.
5.
DefectiveECU.
6.
Defective TPsensor.
Replace.
Replace.
Adjust.
Adjust.
Replace ECU
Replace.
Replace.
Replace.
Clean and prime.
Replace.
Replace.
Clean.
Clean or replace.
Adjust or replace.
Repair or replace.
Replace.
Repairor replace.
Replace.
Replace.
Replace.
Replace.
Replace.