Chrysler PT Cruiser 2001 Service Manual Supplement page 2563

P0300-MULTIPLE CYLINDER MIS-FIRE —
TEST
8 With the DRBIII , read the FREEZE FRAME DATA.
Use the FREEZE FRAME DATA and attempt to determine the cause of the Misfire
DTC.
In the FREEZE FRAME DATA, is the engine RPM over 3000 and the operating temp
normal?
Yes → Test CMP and CKP signals with Lab Scope, check valve timing,
→ Test Complete.
No
ACTION
and perform running vacuum test.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
DRIVEABILITY - GAS
Continued
103
APPLICABILITY
All