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Old 12-28-2005, 10:04 AM
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Southern Comfort Southern Comfort is offline
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Re: Re: Ignition timing question

Quote:
Originally Posted by Hunter1
rlith... I have a P1345 code which is ignition timing or misfire. How likely that is the timing chain? With the distributor bolt out, I can rotate the cap and it runs smoothly. I am only missing by like 5 degrees. Man there is nothing more I would love than to take my 5/16 socket out, disconnect that battery, go play the severely neglected Xbox for about an hour, hook the battery back up and drive away..... huh.. what.. Oh I am awake now I must have dozed off.
Let me try this again.
DTC P1345: CRANKSHAFT/CAMSHAFT POSITION SENSOR CORRELATION
NOTE: For circuit reference, see appropriate wiring diagram in
L - WIRING DIAGRAMS article.
Circuit Description
This DTC monitors the CKP and CMP signals to determine if
they are synchronized. If both signals are not observed by the VCM
within a specified time, VCM will determine that error has occurred.
DTC will set when engine is running, cam sensor reference pulse is not
detected at correct relative position with crank pulse.
Diagnostic Procedures
1) Perform On-Board Diagnostic (OBD) system check. See ONBOARD
DIAGNOSTIC (OBD) SYSTEM CHECK. After performing OBD system
check, go to next step.
2) Install scan tool. Start engine. Using scan tool, monitor
engine RPM. If engine RPM fluctuates up to twice the expected RPM, go
to next step. If engine RPM does not fluctuate up to twice the
expected RPM, go to step 4).
3) Replace crankshaft position sensor. After replacing
sensor, go to step 9).
4) Install scan tool. Start engine. Raise engine speed to

1000 RPM. Monitor camshaft retard on scan tool. If camshaft retard is
-5 to -17 degrees, go to next step. If camshaft retard is not -5 to -
17 degrees, go to step 6).
5) Raise engine speed to 2000 RPM. Check camshaft retard on
scan tool. If camshaft retard changes more than 2 degrees of previous
reading, go to next step. If camshaft retard does not change more than
2 degrees of previous reading, see DIAGNOSTIC AIDS.
6) Check for proper installation of distributor. Remove
distributor cap and gently attempt to rotate rotor. If rotor turns on
distributor shaft, go to step 8). If rotor does not turn on
distributor shaft, go to next step.
7) Check distributor for proper installation. Repair as
necessary. After repairs, go to step 9). If distributor installation
is okay, see DIAGNOSTIC AIDS.
8) Replace distributor. After replacing distributor, go to
next step.
9) Using scan tool, select DTC, CLEAR INFO. Start and warm
engine to normal operating temperature. Select DTC, SPECIFIC, then
enter this DTC. Operate vehicle within the conditions for setting this
DTC. If scan tool indicates that this test ran and passed, go to next
step. If scan tool does not indicate that this test ran and passed,
repeat step 2).
10) Using scan tool, select CAPTURE INFO, REVIEW INFO. If any
undiagnosed DTCs are displayed, go to applicable DTC test.
Diagnostic Aids
Check for loose CMP sensor, excessive free play in timing
chain and gear assembly, incorrectly installed distributor, loose
rotor or distributor hold-down bolt. An intermittent may be caused by
a poor connection, rubbed-through wire insulation or a broken wire
inside insulation.
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