i also have a po 306 cyl misfire. are these repairs something that can be easly fixed? and how.
2007-03-25 05:07:49 · 1 answers · asked by reedt36 1 in Cars & Transportation ➔ Car Makes ➔ GMC
Crank sensor to Cam sensor relationship is off,In other words, the distributor is in wrong or bad, like a worn gear in the bottom of the distributor. Here is the circut code discription
Circuit Description
This DTC determines if the distributor is installed incorrectly, or if there is a mechanical malfunction in the engine. The DTC P1345 is a type A DTC.
Conditions for Setting the DTC
When the engine is running, the cam sensor reference pulse is not detected at the correct relative position to the crankshaft position sensor pulse.
Action Taken When The DTC Sets:
The VCM turns the MIL ON when this DTC is reported and one failure has occurred.
The VCM records the operating conditions at the time the Diagnostic Fails. Freeze Frame and Failure Records store this information.
Conditions for Clearing the MIL/DTC:
The VCM turns OFF the MIL after 3 consecutive drive trips when the test has Run and Passed.
A history DTC will clear if no fault conditions have been detected for 40 warm-up cycles (coolant temperature has risen 22°C (40°F) from the startup coolant temperature and the engine coolant temperature exceeds 70 °C (160°F) during the same ignition cycle).
Use the scan tool Clear Information function.
Diagnostic Aids
Check the following items:
A loose or missing distributor hold down bolt
A loose CMP sensor causing a variance in the sensor signal
Incorrectly installed distributor - 1 tooth off in either advance or retard positions
A loose distributor rotor on the distributor shaft
Excessive free play in the timing chain and gear assembly
Test Description
The numbers below refer to the step numbers on the table.
4. This test will determine it this DIG is intermittent.
5. When the engine speed is raised to 2000 RPM the camshaft retard offset should not vary more than 2~.
6. If excessive pressure is used when performing this test unintentional damage to the distributor shaft could result.
7. If the distributor is one tooth off in either the advanced or retard positions the vehicle may run but 0 camshaft retard offset will not be obtained.
8. If 0 cannot be obtained during this procedure refer to Diagnostic Aids.
As per say P0306 you need to find the cause of the misfire and fix it
2007-03-25 05:15:08 · answer #1 · answered by Magikmann 4 · 0⤊ 0⤋