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97 Lude Knock Sensor/engines Issues

 
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Old 09-22-2010, 09:37 PM
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97 Lude Knock Sensor/engines Issues

Hey Fellow Luders,

I had a second cylider misfire and knock sensor ingine giagnostic codes last week.

I have done a complete turn-up by replacing the following:

1. Distributor cap and rotor -MSD Ignition 82923 Modified Distributor Cap and
Rotor Kit
2.Plug Wires - ACCEL 7912R 300 Plus ThunderSport Red Ferro-Spiral Spark
Plug Wire Set
3.NGK (6441) ZFR6FIX-11 Iridium IX Spark Plugs

4. Knock Sensor - STANDARD MOTOR PRODUCTS


After changing all these parts, my engine light is still on - the codes indicates a knock sensor problem.

I am sure Iam gettinga false alarm from the knock sensor.

Can somebody point me the right direction , what else should I check ?

Any assistance will be very much appreciated.
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Old 09-22-2010, 09:42 PM
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Re: 97 Lude Knock Sensor/engines Issues

is the misfire gone ? if not i have seen knock codes from misfires before ..
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Old 09-22-2010, 09:49 PM
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Re: 97 Lude Knock Sensor/engines Issues

Yes the misfire in gone ! The knock sensor problem still remains.
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Old 09-22-2010, 09:51 PM
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Re: 97 Lude Knock Sensor/engines Issues

whats the code number ? let me do a little research
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Old 09-22-2010, 09:58 PM
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Re: 97 Lude Knock Sensor/engines Issues

The code is P0325
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Old 09-22-2010, 11:34 PM
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Re: 97 Lude Knock Sensor/engines Issues

First have you cleared the code from the ECM after replacing the sensor? If not then do that first, if it comes back on after you clear it then proceed to the following step. Next, all that code tells you is there is a circuit malfuntction, which means it could be the wires that lead to the sensor as well as the sensor. Since you have replaced the knock sensor, then my guess would be frayed wires causing a short. So trace the wires as far as you can and see if there is damage to the wires. Try those two things first.
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Old 09-23-2010, 07:03 AM
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Re: 97 Lude Knock Sensor/engines Issues

Yes, I cleared all the codes from the ECM after replacing the sensor.

I will work on the second option - Tracing possible fried wires .
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Old 09-23-2010, 10:11 AM
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Re: 97 Lude Knock Sensor/engines Issues

Code Description
P0325 Knock Sensor (Rear) Circuit Malfunction
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P0325 Knock Sensor (Rear) Circuit Malfunction
Possible Causes Setting Conditions

* Knock sensor signal circuit is open (rear bank of engine)
* Knock sensor signal circuit is grounded (rear bank of engine)
* Knock sensor not tightened properly
* Knock sensor damaged or has failed (it may be open internally)
* PCM has failed

Engine running for over 1 minute, and the PCM detected an incorrect signal at the rear Knock Sensor (KS) circuit.

This code sets in 2 Trip(s).
This code will turn on the MIL (Malfunction Indicator Lamp)
Malfunction Indicator Lamp
The Malfunction Indicator Lamp (MIL) alerts the driver that the Powertrain Control Module (PCM) has detected an OBD II emission-related component or system fault. When this type of malfunction occurs, an OBD II Diagnostic Trouble Code (DTC) will be set by the PCM. The MIL is located on the instrument cluster and is labeled CHECK ENGINE, SERVICE ENGINE SOON, or is identified with an ISO standard engine symbol (i.e., a picture of an engine).
Bulb Test
Each time the ignition switch is turned to the "on" position, the MIL indicator is illuminated for about 3 seconds (which is a function of the PCM).
Readiness Codes
To check if the Readiness Codes are set to complete, turn the ignition switch "on", but do not start the engine. The MIL will come "on" for 15-20 seconds. If it then goes "off", the Readiness Codes are set to complete, If it flashes five times, one or more of the Readiness Codes are not set to complete. To set Readiness Codes from incomplete to complete, perform the drive cycle procedure for the appropriate code.
MIL Lamp-On Message
Each time the PCM detects an Emissions related fault, the MIL is illuminated to inform the driver that the vehicle needs to be taken in for service.

COMPONENT MONITOR DRIVE CYCLE INSTRUCTIONS

* Do not turn off the ignition switch during the test procedure.
* All Onboard Diagnostic Monitors are cleared when the battery is disconnected or when the Powertrain Control Module (PCM) is cleared with the Scan Tool.
* This drive cycle can be used to determine if the Readiness code for this Monitor will run and complete, and if the MIL will remain off after the vehicle is driven.
* Operating Ranges: When a range of values is provided, try to operate the vehicle in the middle of the range. For example, if the vehicle speed range calls for 45-55 mph, drive the vehicle as close as possible to 50 mph. If the engine speed should be 1,000-2,000 rpm, try to operate the engine at 1,500 rpm.
* Scan Tool Data: There are certain Parameter Identification (PID) values that must be within range before this Monitor will "run". It can be helpful to pull up those PID items on the Scan Tool so an assistant can view them during testing.
* The Readiness code for this Monitor defaults to "continuous" or "monitoring" because this Monitor runs continuously when the engine is cranking or running.

COMPONENT MONITOR PRETEST CONDITIONS

* MIL is off.
* No Emission related DTC's are present.

TEST PROCEDURE

1. Connect the Scan Tool to the data link connector (DLC). Use the Scan Tool to clear any stored DTC's and to reset the OBD Monitors.
2. Start the engine and allow it to run at idle speed for 15 seconds.
3. Accelerate at part-throttle to 40 mph and maintain that speed for several minutes. Bring the vehicle to a stop, and then allow the engine to idle with the transmission in Drive (in Neutral for M/T) for 15 seconds.
4. Then accelerate at moderate throttle to 50 mph and maintain that speed for 15 seconds. Bring the vehicle to a stop, and then accelerate to 40 mph and maintain that speed for 15 seconds. Bring the vehicle to a stop and allow the engine to idle for 15 seconds. Repeat this step at least 5 times.
5. Check for any Pending codes in the Generic OBD II section of the Scan Tool. If no Pending codes are set, the Component Monitor test is complete. If any Pending codes are set, refer to the appropriate trouble code repair information to make the repair.



diag info
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Old 09-23-2010, 11:22 AM
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Re: 97 Lude Knock Sensor/engines Issues

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Old 09-23-2010, 06:11 PM
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Re: 97 Lude Knock Sensor/engines Issues

Thanks for the information element600rr ! . I will try all the tests.

Regards !
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Old 09-23-2010, 08:58 PM
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Re: 97 Lude Knock Sensor/engines Issues

if you need diagrams let me know i can get those also .
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Old 09-23-2010, 10:31 PM
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Re: 97 Lude Knock Sensor/engines Issues

Great , please get me the diagrams - full action this weekend
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Old 09-24-2010, 01:13 PM
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Re: 97 Lude Knock Sensor/engines Issues

Hey guys , still can' t fix my Lude.

Can somebody direct me to Lude specialist in Fairfield County CT or within 30 miles radius from New Haven/Bridgeport/Fairfield/Stanford CT?

Regards to all
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Old 09-24-2010, 10:22 PM
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Re: 97 Lude Knock Sensor/engines Issues

Hey guys , still can' t fix my Lude.

Can somebody direct me to Lude specialist in Fairfield County CT or within 30 miles radius from New Haven/Bridgeport/Fairfield/Stanford CT?

Regards to all
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Old 09-29-2010, 08:54 PM
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Re: 97 Lude Knock Sensor/engines Issues

Fellow Luders, finnaly got my knock sensor issue resolved.

An original knock sensor from a Honda Dealer did the trick !!
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Old 10-01-2010, 11:50 PM
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Re: 97 Lude Knock Sensor/engines Issues

thanks for the update. I will keep this in mind when I have to order parts.
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