Operation CHARM
: Car repair manuals for everyone.
Home
>>
Pontiac
>>
1987
>>
6000 V6-173 2.8L
>>
Repair and Diagnosis
>>
Powertrain Management
>>
Computers and Control Systems
>>
Testing and Inspection
>>
Scan Tool Testing and Procedures
>>
Function Selector Positions
>>
Knock Retard
Knock Retard
The display indicates the number of degrees the ECM is retarding the EST spark timing.