Chrysler 2005 Crossfire SRT6 Service Manual page 2282

9 - 358 ENGINE - ELECTRICAL DIAGNOSTICS
(P0301) CYLINDER #1 MISFIRE (CONTINUED)
6.
CHECKING FOR POSSIBLE MECHANICAL PROBLEM
Turn the ignition off.
Check for any of the following conditions/mechanical problems.
ENGINE VACUUM - must be at least 330 mm Hg (13 in. Hg) in neutral
ENGINE VALVE TIMING - must be within specifications
ENGINE COMPRESSION - must be within specifications
ENGINE EXHAUST SYSTEM - must be free of any restrictions or leaks.
ENGINE PCV SYSTEM - must flow freely
TORQUE CONVERTER STALL SPEED - must be within specifications
POWER BRAKE BOOSTER - must not have internal vacuum leaks
FUEL - must be free of contamination
Are there any engine mechanical problems?
Yes >> Repair as necessary.
Perform POWERTRAIN VERIFICATION TEST - VER 2.
No >> Go To 7
7.
CHECKING FUEL PRESSURE
WARNING: THE FUEL SYSTEM IS UNDER A CONSTANT PRESSURE (EVEN WITH THE ENGINE OFF).
BEFORE TESTING OR SERVICING ANY FUEL SYSTEM HOSE, FITTING OR LINE, THE FUEL SYSTEM PRES-
SURE MUST BE RELEASED.
With the ignition off.
Install a fuel pressure gauge to the fuel rail.
Start the engine and observe the fuel pressure reading.
Note: Fuel pressure specification is 3.7 to 4.2 bar (54 to 61 psi).
Choose a conclusion that best matches your fuel pressure reading.
Within Specification
Go To 8
Below Specification
Go To 12
Above Specification
Replace the fuel filter/pressure regulator. (Refer to 14 - FUEL SYSTEM/FUEL DELIVERY/FUEL FILTER
- REMOVAL).
Perform POWERTRAIN VERIFICATION TEST - VER 2.
ZH