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Old 04-15-2011, 03:42 PM
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Forbes Forbes is offline
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Default help out the new kid

i'm about to do a tune up on the ole caprice, what sparkplugs and wires do you guys suggest on the LT1's? i also scanned my car and got all these codes... let me know what else needs to bed done.

p0137
p0153
p0161
p1441
p1371
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  #2  
Old 04-15-2011, 11:19 PM
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Default Oh am I going to catch grief about this...

Page one of 2: http://i368.photobucket.com/albums/o...uneUp-1of2.jpg

Page 2 of 2: http://i368.photobucket.com/albums/o...uneUp-2of2.jpg


as for the codes, download Qalo's book: http://www.impalaclub.com/naisso/ss_handbook.pdf

HTH
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Tested a coil by listening to MR.WOODS... ****ing coil WORKS just fine.... ass hole

Last edited by The Fooser Guy; 04-15-2011 at 11:21 PM.
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  #3  
Old 04-16-2011, 12:37 AM
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P0137
CIRCUIT DESCRIPTION

The PCM supplies a voltage of about 450 mV between the Heated Oxygen Sensor (HO2S) high and low signal circuits. The oxygen sensor varies the voltage over a range from about 1000 mV when the exhaust is rich, down through about 10 mV when exhaust is lean.

The PCM monitors and stores the heated oxygen sensor (HO2S) voltage information. The PCM evaluates the HO2S voltage samples to determine the amount of time the HO2S voltage was out of range. The PCM will compare the stored HO2S voltage samples taken within each sample period and determine if majority of the samples are out of the operating range.

The PCM monitors the HO2S voltage for being fixed below a predetermined voltage. If the PCM detects the voltage is below a predetermined voltage, a DTC will set.

CONDITIONS FOR SETTING THE DTC

DTCs P0100, P0102, P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0122, P0123, P0125, P0181, P0200, P0372, P1371 not set.
Engine coolant temperature greater than 48C (118F
Fuel system operating in Closed Loop.
Fuel trim learn enabled.
Air/Fuel ratio between 14.6:1 and 14.8:1.
TP angle between 3% and 20%.
HO2S signal voltage remains below 39 mV for 38 seconds.
ACTION TAKEN WHEN THE DTC SETS

The PCM will illuminate the Malfunction Indicator Lamp (MIL) on the second consecutive drive trip that the diagnostic runs and fails.
The PCM will record operating conditions at the time the diagnostic fails. The first time the diagnostic fails, this information will be stored in Failure Records. If the diagnostic reports a failure on the second consecutive drive trip, the operating conditions at the time of failure will be written to Freeze Frame and the Failure record will be updated.
CONDITIONS FOR CLEARING THE MIL/DTC

The PCM will turn the MIL OFF after three consecutive drive trips that the diagnostic runs and does not fail.
A last test failed (Current DTC) will clear when the ignition is cycled and the diagnostic runs and does not fail.
A History DTC will clear after forty consecutive warm-up cycles, if no failure s are reported by this or any other emission related diagnostic.
PCM battery voltage is interrupted.
Using a Scan tool.
DIAGNOSTIC AIDS

Heated Oxygen Sensor (HO2S)) wire. Sensor pigtail may be contacting the exhaust manifold.
An oxygen supply inside the HO2S is necessary for proper operation. This supply of oxygen is provided through the HO2S wires. All HO2S wires and connections should be inspected for breaks or contamination. Refer to Repair Procedures in Electrical Diagnosis (SA Cell 5).
Check for intermittent ground in signal wire between connector and sensor.
Lean injector(s). Perform Injector Balance Test.
Fuel contamination. Water near the in-tank fuel pump inlet can be delivered to the injectors. The water causes a lean exhaust and can set a DTC.
Fuel pressure. System will be lean if fuel pressure is low. Refer to Fuel System diagnosis.
Exhaust leaks. An exhaust leak near the HO2S can cause a lean condition. Vacuum or crankcase leaks can also cause a lean condition.
If the above are OK, the HO2S may be at fault. For intermittents, refer to Symptoms. See: Testing and Inspection
TEST DESCRIPTION

Number(s) below refer to step numbers on the diagnostic table.

Engine must be at normal operating temperature before performing this test. For any test that requires probing the PCM or a component harness connector, must use the Connector Test Adapter kit J 35616-A. Using this kit will prevent damage to the harness connector terminals.
Using Freeze Frame and/or Failure Records data may aid in locating an intermittent condition. If the DTC cannot be duplicated, the information included in the Freeze Frame and/or Failure Records data can be useful in determining how many miles since the DTC set. The Fail Counter and Pass Counter can also be used to determine how many ignition cycles the diagnostic reported a pass and/or a fail. Operate vehicle within the same freeze frame conditions (RPM, load, vehicle speed, temperature etc.) that were noted. This will isolate when the DTC failed.
It may be necessary to lower the exhaust system to gain sufficient access to an HO2S and/or its connector. Refer to Exhaust System. Grounding the low side circuit of the HO2S should cause the HO2S voltage to display a bias voltage. If the voltage stayed near 0.0 volts indicates the low circuit is open, or the high circuit is open or grounded.
Disconnecting the PCM will allow using the DVM (J 39200) to check continuity of the circuits. This will aid in locating an open or shorted circuit.


P0153


CIRCUIT DESCRIPTION

The PCM continuously monitors the Heated Oxygen Sensor (HO2S) activity for 100 seconds. During the monitor period the PCM counts the number of times that the HO2S responds from rich to lean and from lean to rich and adds the amount of time it took to complete all transitions. With this information, an average time for all transitions can be determined. If the average response time is too slow, a DTC will set.

A lean to rich transition is determined when the HO2S voltage changes from less than 300 mV to greater than 600 mV. A rich to lean transition is determined when the HO2S voltage changes from more than 600 mV to less than 300 mV. An HO2S that responds too slowly is most likely defective and should be replaced.

CONDITIONS FOR SETTING THE DTC

DTCs P0100, P0102, P0103, P0107, P0108, P0117, P0118, P0125, P0151, P0152, P0154, P0155, P0200, P0372, not set.
Fuel system operating in Closed Loop.
Engine speed between 1000 RPM and 1700 RPM.
Engine Air Flow between 12 grams per second and 28 grams per second.
EVAP Canister purge duty cycle less than 100%.
Lean to rich (Below 300 mV to above 600 mV) response average time is greater than 110 Milliseconds or 150 milliseconds if the vehicle is equipped with an L99 engine.
Rich to lean (Above 600 mV to below 300 mV) response average time is greater than 110 Milliseconds or 150 milliseconds if the vehicle is equipped with an L99 engine.
Above conditions are met for 100 seconds
ACTION TAKEN WHEN THE DTC SETS

The PCM will illuminate the Malfunction Indicator Lamp (MIL) on the second consecutive drive trip that the diagnostic runs and fails.
The PCM will record operating conditions at the time the diagnostic fails. The first time the diagnostic fails, this information will be stored in Failure Records. If the diagnostic reports a failure on the second consecutive drive trip, the operating conditions at the time of failure will be written to Freeze Frame and the Failure record will be updated.
CONDITIONS FOR CLEARING THE MIL/DTC

The PCM will turn the MIL OFF after three consecutive drive trips that the diagnostic runs and does not fail.
A last test failed (Current DTC) will clear when the ignition is cycled and the diagnostic runs and does not fail.
A History DTC will clear after forty consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
PCM battery voltage is interrupted.
Using a Scan tool.
DIAGNOSTIC AIDS

A malfunction in the HO2S heater circuits will cause a DTC to set. Check HO2S heater circuits for intermittent opens/connections.
An oxygen supply inside the HO2S is necessary for proper operation. This supply of oxygen is provided through the HO2S wires. All HO2S wires and connections should be inspected for breaks or contamination. Refer to Repair Procedures in Electrical Diagnosis (SA Cell 5).
Using Freeze Frame and/or Failure Records data may aid in locating an intermittent condition. If the DTC cannot be duplicated, the information included in the Freeze Frame and/or Failure Records data can be useful in determining how many miles since the DTC set. The Fail Counter and Pass Counter can also be used to determine how many ignition cycles the diagnostic reported a pass and/or a tail. Operate vehicle within the same freeze frame conditions (RPM, load, vehicle speed, temperature etc.) that were noted. This will isolate when the DTC failed. For intermittents, refer to Symptoms. See: Testing and Inspection
TEST DESCRIPTION

Number(s) below refer to step numbers on the diagnostic table.

Determines if the fault is present. This test may take 5 minutes for the diagnostic to run. For any test that requires probing the PCM or a component harness connector, must use the Connector Test Adapter Kit J 35616-A. Using this kit will prevent damage to the harness connector terminals.
When DTCs P0133 and P0153 are set at the same time, is good indication that a fuel contamination problem is present.
An exhaust leak 6-12 inches away from the HO2S can cause a DTC to set.
Checks whether a good ground circuit is available.
Checks the integrity of the signal circuit to the PCM.
Checks the integrity of the signal circuit to the PCM.
Certain RTV silicone gasket materials give off vapors that can contaminate the HO2S. There is also a possibility of silicone contamination caused by silicone in fuel. If it appears that the sensors are contaminated by silicone and all silicone sealant is a none silicone base, advise customer to try a different fuel company. A fuel filler restrictor missing, indicates leaded fuel may have been used.
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  #4  
Old 04-16-2011, 12:40 AM
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P0161


CIRCUIT DESCRIPTION

The PCM supplies a bias voltage (approximately 450 mV) on the Heated Oxygen Sensor (HO2S) signal high and low circuits. When the ignition is turned to the ON position, battery voltage is supplied to the HO2S heater. As the heater reaches operating temperature, the HO2S voltage responds by changing from a bias voltage range to normal operation. Typically, as the HO2S reaches operating temperature, the HO2S voltage goes from a bias voltage to a voltage below 300 mV. Depending on the exhaust gas content, it is possible for the HO2S voltage to go above 450 mV.

The PCM will run the heater test only on a cold start (depends on cumulative air flow) and only once an ignition cycle. When the engine is started the PCM will monitor the HO2S voltage. When the HO2S

voltage goes above or below the bias range threshold, the PCM will determine how much time it took. If the PCM detects that it took too much time for the HO2S to enter into normal operating range, a DTC will set. The time it takes the HO2S to reach operating temperature is based on the amount of air that flows into the engine.

CONDITIONS FOR SETTING THE DTC

DTCs P0100, P0102, P0103, P0112, P0113, P0117, P0118, P0125, P0122, P0123, P0157, P0158, P0160, P0200 not set.
Engine is started and Intake Air and Engine Coolant temperatures are less than 50C (l22F) and are within 3C (5F) of each other at start-up.
Ignition voltage between 10 volts and 16 volts.
Engine air flow less than 40 grams per second.
TP sensor angle less than 20%.
HO2S voltage remains between 300 mV and 700 mV for a predetermined amount of time (depends on engine coolant temperature and air flow).
ACTION TAKEN WHEN THE DTC SETS

The PCM will illuminate the Malfunction Indicator Lamp (MIL) on the second consecutive drive trip that the diagnostic runs and fails.
The PCM will record operating conditions at the time the diagnostic fails. The first time the diagnostic fails, this information will be stored in Failure Records. If the diagnostic reports a failure on the second consecutive drive trip, the operating conditions at the time of failure will be written to Freeze Frame and the Failure record will be updated.
CONDITIONS FOR CLEARING THE MIL/DTC

The PCM will turn the MIL OFF after three consecutive drive trips that the diagnostic runs and does not fail.
A last test failed (Current DTC) will clear when the ignition is cycled and the diagnostic runs and does not fail.
A History DTC will clear after forty consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
PCM battery voltage is interrupted.
Using a Scan tool.
DIAGNOSTIC AIDS

Using Freeze Frame and/or Failure Records data may aid in locating an intermittent condition. If the DTC cannot be duplicated, the information included in the Freeze Frame and/or Failure Records data can be useful in determining how many miles since the DTC set. The Fail Counter and Pass Counter can also be used to determine how many ignition cycles the diagnostic reported a pass and/or a fail.
Operate vehicle within the same freeze frame conditions (RPM, load, vehicle speed, temperature etc.) that were noted. This will isolate when the DTC failed.

The heater diagnostic will only run on a cold start and it will only run once per ignition cycle.
An oxygen supply inside the HO2S is necessary for proper operation. This supply of oxygen is provided through the HO2S wires. All HO2S wires and connections should be inspected for breaks or contamination.
For intermittents, refer to Symptoms. See: Testing and Inspection
TEST DESCRIPTION

Number(s) below refer to step numbers on the diagnostic table.

The engine must be allowed to cool, as the HO2S maybe at operating temperature and no drop or rise in HO2S voltage would occur. If the HO2S voltage stays between 300-700 mV indicates the HO2S heater is inoperative. For any test that requires probing the PCM or a component harness connector, must use the Connector Test Adapter kit J 35616-A. Using this kit will prevent damage to the harness connector terminals.
If more then one HO2S DTC is set, is good indication that the HO2S fuse is open. Check all related circuits going to all heated oxygen sensors for a short to ground. If all wiring checks to be OK, it may be necessary to disconnect each HO2S one at a time to locate a shorted sensor.
It may be necessary to lower the exhaust system to gain sufficient access to an HO2S and/or it's connector. Refer to Exhaust System Checks whether B+ supply is available at the sensor
Checks whether a ground is available at the sensor.
Checks whether the HO2S heater element is internally open.

P1441

CIRCUIT DESCRIPTION

The EVAP vacuum switch is a normally closed switch connected to ground, mounted in the vacuum line between the EVAP canister and the EVAP solenoid. 12 volts is supplied to the switch through a pull-up resistor in the PCM. When the PCM commands the EVAP canister purge solenoid valve open (purge ON) and engine vacuum draws the evaporative emissions from the canister, the EVAP vacuum switch opens (signal voltage high) providing feedback to the PCM that the EVAP system is operating. When the PCM commands purge OFF, the EVAP vacuum switch closes (signal voltage low) confirming purging has ceased.

CONDITIONS FOR SETTING THE DTC

DTCs P0100, P0101, P0102, P0103, P0106, P0323, P0325, P0327, P0332, P0335, P0336, P0372, P0400, P0403, P0410, P0412, P0420, P0430,P0441, P0443, P0500, P0502, P0503, P0506, P0507, P0530, P0531, P071 9, P0758, P1415, P1642, P1652 not set.
ECT less than 115C (239F)
IAT greater than 3C (37F)
Engine speed between 500 and 3000 RPM
TP Angle less than 50%
MAP less than 70 kPa
BARO greater than 77 kPa
Purge not enabled
The PCM detects high signal voltage on the EVAP vacuum switch signal circuit when the PCM is not commanding purge ON.
Fault present for 5 seconds
ACTION TAKEN WHEN THE DTC SETS

The PCM will illuminate the Malfunction Indicator Lamp (MIL) on the second consecutive drive trip that the diagnostic runs and fails.
The PCM will record operating conditions at the time the diagnostic fails. The first time the diagnostic fails, this information will be stored in Failure Records. If the diagnostic reports a failure on the second consecutive drive trip, the operating conditions at the time of failure will be written to Freeze Frame and the Failure record will be updated.
CONDITIONS FOR CLEARING THE MIL/DTC

The PCM will turn the MIL OFF after three consecutive drive trips that the diagnostic runs and does not tail.
A last test tailed (Current DTC) will clear when the diagnostic runs and does not tail.
A History DTC will clear after forty consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
PCM battery voltage is interrupted.
Using a Scan tool.
DIAGNOSTIC AIDS

Before replacing any components, visually/physically check for the following:

Mis-routed harness.
Rubbed through wire insulation.
Broken wire inside the insulation.
Kinked or damaged vacuum hoses.
Physically damaged system components.
Inspect components and vacuum lines for traces of carbon or other contaminants. The presence of foreign material may be causing a restriction in the system or preventing the solenoid valve from closing properly. Either condition may cause a DTC to set.
For intermittents, refer to Symptoms. See: Testing and Inspection

TEST DESCRIPTION

Number(s) below refer to step numbers on the diagnostic table.

Since the vacuum switch only requires a vacuum of only a few inches of water to operate (a very small unit of vacuum), a properly operating switch will transition even with the canister end of the hose disconnected and un-plugged.
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1994 Chevy Caprice 9C1, 126,000 miles, T56, 4.10's

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Old 04-16-2011, 12:40 AM
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P1371


CIRCUIT DESCRIPTION

The distributor ignition system supplies two timing inputs to the PCM, a high resolution signal (180 pulses per one crankshaft revolution) and a low resolution signal (4 pulses per one crankshaft revolution). The PCM can determine if one of the timing inputs is not being received by comparing the two inputs. If the PCM detects the high resolution timing pulse without detecting the low resolution timing pulse, DTC P1371 will set.

The high and low resolution circuits toggle between 0 and 5 volts as the camshaft turns. The following malfunctions to the low resolution circuit will cause a DTC P1371 to set:

An open.
A short to voltage.
A short to ground.
A defective ignition module within the distributor.
CONDITIONS FOR SETTING THE DTC

The PCM detects a predetermined amount of high resolution pulses before detecting any low resolution pulses.
ACTION TAKEN WHEN THE DTC SETS

The PCM will illuminate the Malfunction Indicator Lamp (MIL) when the diagnostic runs and fails.
The PCM will record operating conditions at the time the diagnostic fails. This information will be stored in the Freeze Frame and/or Failure Records.
The injector will be disabled for the entire ignition cycle.
CONDITIONS FOR CLEARING THE MIL/DTC

The PCM will turn the MIL OFF after three consecutive drive trips that the diagnostic runs and does not fail.
A last test failed (Current DTC) will clear when the diagnostic runs and does not fail.
A History DTC will clear after forty consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
PCM battery voltage is interrupted.
Using a Scan tool.
DIAGNOSTIC AIDS

For any test that requires probing the PCM or a component harness connector, must use the Connector Test Adapter Kit J 35616-A. Using this kit will prevent damage to the harness connector terminals.
DTC P1371 will set if the high and low resolution circuits are shorted together. Before replacing any components, inspect the low and high resolution circuits for being shorted.
When an intermittent DTC P1371 occurs, a misfire will be apparent. To locate an intermittent, use the scan tools snapshot feature. Try to duplicate the conditions under which the misfire is present. When reviewing captured data, watch for any abnormal high and low resolution timing pulses.
If DTC P1351 and/or DTC P1361 is also set with a DTC PI 371, and no external fault can be found, replace the PCM. If only DTC P1371 is set and the distributor connections are OK, replace the distributor.
If distributor components must be replaced, check distributor vent system operation. Refer to Distributor Ignition System.
If a DTC P1371 is not present and a no start condition is present, Refer to Engine Cranks but Does Not Run.
For intermittents, refer to Symptoms. See: Testing and Inspection
TEST DESCRIPTION

Number(s) below refer to step numbers on the diagnostic table.

This step verifies if the malfunction is active. If the engine starts, the malfunction is not present at this time.
If the harness and connections check out OK, but the engine stalls after reaching higher operating temperatures, return to Step 2 and test the system while the fault is present.
Normal voltage may vary slightly from the specified value. A value that is significantly higher or lower indicates a problem. This step isolates the circuit between the test connector and the PCM.
Normal voltage may vary slightly from the specified value. A value that is significantly higher or lower indicates a problem. This step isolates the circuit between the test connector and the distributor.
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  #6  
Old 04-16-2011, 12:41 AM
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There is some reading for you
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1994 Chevy Caprice 9C1, 126,000 miles, T56, 4.10's

C6 Grandsport Brake Install C6 Z06 Wheels T56 Installation Manual
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