Question about 2005 Isuzu Ascender

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Misfires camshaft and crankshaft changed

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  • mark king
    mark king Nov 24, 2014

    I HAVE A 06 AUSENDER SMALL MISS IN IDLE

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A misfire has nothing to do with crank and cam position sensors . those are for timing. check the ignition control module or coils and the spark plugs

Posted on Dec 06, 2012

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Posted on Jan 02, 2017

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2007 Cadillac 3.6L srx, check engi, code p00017 crank sensor - replaced, still running rough and giving me a misfire on 1,3&5. Changed plugs, still 1,3&5 misfire - 155000 miles, could it need new coil


P0017 timing chain Chevy Colorado P0017 Case Study Part 1
155,000 miles This is not a DTC for the crank sensor . This is for variable valve timing .
DTC P0017: Crankshaft Position (CKP) - Exhaust Camshaft Position (CMP) Correlation Bank 1
The camshaft position (CMP) actuator system enables the engine control module (ECM) to change the timing of the camshafts while the engine is operating. The CMP actuator solenoid signal from the ECM is pulse width modulated (PWM). The ECM controls the CMP actuator solenoid duty cycle by controlling the amount of solenoid ON time. The CMP actuator solenoid controls the advance or the retard of each camshaft. The CMP actuator solenoid controls the oil flow that applies the pressure to advance or retard the camshafts.
Ignition voltage is supplied directly to the CMP actuator solenoid. The ECM controls the solenoid by grounding the control circuit with a solid state device called a driver. The ECM compares the camshaft position or the camshaft angle, to the position of the crankshaft.

Your a little out of your league on this ! Your best bet ,take it to a qualified repair shop !

• Inspect the engine for any recent engine mechanical repairs. An incorrectly installed camshaft, camshaft actuator, camshaft sensor, crankshaft sensor, or timing chain can cause this DTC to set.
• An actuator that is in the full advance or retard position can cause this DTC to set.
• The presence of DTCs P0008 and P0009 along with P0016, P0017, P0018, and P0019 indicates a possible condition with the primary timing chain and the alignment between both intermediate sprockets and the crankshaft. Or, the crankshaft reluctor wheel has moved and is no longer referenced to top dead center (TDC).
• Observing the desired and actual camshaft angle parameters, with a scan tool before a DTC sets, may help to isolate whether a condition is specific to one camshaft, one bank, or caused by a condition with the primary crankshaft timing.

Jan 02, 2017 | 2007 Cadillac SRX

1 Answer

2000 trail blazier with random misfire,sulfur smell, glowing convertor. New cap,rotor button plugs,plug wires and convertor NO CHANGE ! ANY IDEAS ?


Is the check engine light lit ? Any DTC'S - diagnostic trouble codes ? What engine ? 4.3 L vortex . Leaking fuel pressure regulator under the upper intake manifold . Leaking fuel injectors ! Ignition timing problem . How does the engine run ? Who installed the plugs an wires ? are they right ? Fuel pressure leak down test, fuel injector balance testing . Check distributor drive gear an slop in the shaft . Did you have distributor out ? Is it in the proper position ? What cylinder is misfiring ? engine mechanical problem ! What do spark plugs look like ? fouled , soaked with fuel . Do a engine compression test .
The camshaft drives the distributor shaft which rotates providing a spark to the correct cylinder by way of the cap and rotor. The camshaft position sensor functions much like the crankshaft sensor previously described but provides only a 1x signal to the VCM. That is, for every 2 rotations of the crankshaft, there is 1 rotation of the camshaft. Note that the CMP sensor will not affect driveability. The sole purpose of the CMP sensor is to provide the VCM with the necessary information for the misfire DTCs.

Nov 10, 2015 | Cars & Trucks

2 Answers

My truck sonoma gmc 2001 dont past the emission test


Definition of Diagnostic Trouble Code P1345 Audi: Ignition Coil Power Output Stage 3 Short to Ground BMW: Misfire Cylinder 2 with Fuel Cut-Off Buick: Crankshaft Position (CKP)-Camshaft Position (CMP) Correlation Cadillac: Crankshaft Position (CKP)-Camshaft Position (CMP) Correlation Chevrolet: Crankshaft Position (CKP)-Camshaft Position (CMP) Correlation Ford: Cylinder Discrimination Signal (Signal From Camshaft Position Sensor) GMC: Crankshaft Position (CKP)-Camshaft Position (CMP) Correlation Isuzu: Crankshaft Position - Camshaft Position Correlation Kia: No SGC Signal (1.6L) Lexus: Variable Valve Timing / CMP Sensor Range / Performance Lincoln: Cylinder Discrimination Signal (Signal From Camshaft Position Sensor) Mazda: Cylinder Discrimination Signal (from CMP sensor) Mercury: Cylinder Discrimination Signal (Signal From Camshaft Position Sensor) Oldsmobile: Crankshaft Position (CKP)-Camshaft Position (CMP) Correlation Pontiac: Crankshaft Position (CKP)-Camshaft Position (CMP) Correlation Saturn: Crankshaft Position (CKP)-Camshaft Position (CMP) Correlation Toyota: Variable Valve Timing / CMP Sensor Range / Performance Volkswagen: Ignition Coil Power Output Stage 3 Short to Ground

Jul 19, 2015 | GMC Cars & Trucks

1 Answer

Location of camshaft sensor


There are 2 camshaft sensors A and B, on the back of the cylinder head.behind the intake cam and the exhaust cam. They are directly THe crankshaft sensor is on the timing chain cover, low down near the crankshaft. Can you give some more details?

Apr 06, 2014 | 2007 Honda Accord Sedan

1 Answer

P0017 code on a 2006 Rainier 4.2l


This means that your crankshaft and camshaft sensors are not in sync, meaning that your timing belt has jumped a tooth, so you are out of time.

Dec 04, 2013 | 2006 Buick Rainier

1 Answer

What does acam or crankshaft sensor do


  • The crankshaft position sensor identifies position of the crankshaft to the ignition control module (ICM), engine control module (ECM) or powertrain control module (PCM)
  • When not replaced, vehicle could experience no- or hard start, long crank time, misfire, lack of power, excessive hydrocarbons in oil, spark plug fouling, catalytic converter failure, poor fuel economy, CEL/MIL illumination or intermittent shutdown.
  • The camshaft position sensor identifies position of the camshaft to the ignition control module (ICM), engine control module (ECM) or powertrain control module (PCM)
  • When not replaced, vehicle could experience no- or hard start, long crank time, misfire, lack of power, excessive hydrocarbons in oil, spark plug fouling, catalytic converter failure, poor fuel economy, CEL/MIL illumination or intermittent shutdown
  • Jul 24, 2012 | Cars & Trucks

    2 Answers

    05 kia amanti with diagnostics codes p0350,p0320,p0300,p0302,p0303,p0304,p0305,p0306.skipping at times.when it does skip & misfire the rpm gauge goes crazy.this problem is not consitant


    Generic OBD II Diagnostic Trouble Codes

    DTC CODES P0300 to P0399

    P0300....Random/Multiple Cylinder Misfire Detected

    P0301....Cylinder 1 Misfire Detected

    P0302....Cylinder 2 Misfire Detected

    P0303....Cylinder 3 Misfire Detected

    P0304....Cylinder 4 Misfire Detected

    P0305....Cylinder 5 Misfire Detected

    P0306....Cylinder 6 Misfire Detected

    P0307....Cylinder 7 Misfire Detected

    P0308....Cylinder 8 Misfire Detected

    P0309....Cylinder 9 Misfire Detected

    P0310....Cylinder 10....Misfire Detected

    P0311....Cylinder 11 Misfire Detected

    P0312....Cylinder 12 Misfire Detected

    P0313....Misfire Detected with Low Fuel

    P0314....Single Cylinder Misfire (Cylinder not Specified)

    P0320....Ignition/Distributor Engine Speed Input Circuit

    P0321....Ignition/Distributor Engine Speed Input Circuit Range/Performance

    P0322....Ignition/Distributor Engine Speed Input Circuit No Signal

    P0323....Ignition/Distributor Engine Speed Input Circuit Intermittent

    P0324....Knock Control System Error

    P0325....Knock Sensor 1 Circuit (Bank 1 or Single Sensor)

    P0326....Knock Sensor 1 Circuit Range/Performance (Bank 1 or Single Sensor)

    P0327....Knock Sensor 1 Circuit Low Input (Bank 1 or Single Sensor)

    P0328....Knock Sensor 1 Circuit High Input (Bank 1 or Single Sensor)

    P0329....Knock Sensor 1 Circuit Input Intermittent (Bank 1 or Single Sensor)

    P0330....Knock Sensor 2 Circuit (Bank 2)

    P0331....Knock Sensor 2 Circuit Range/Performance (Bank 2)

    P0332....Knock Sensor 2 Circuit Low Input (Bank 2)

    P0333....Knock Sensor 2 Circuit High Input (Bank 2)

    P0334....Knock Sensor 2 Circuit Input Intermittent (Bank 2)

    P0335....Crankshaft Position Sensor A Circuit

    P0336....Crankshaft Position Sensor A Circuit Range/Performance

    P0337....Crankshaft Position Sensor A Circuit Low Input

    P0338....Crankshaft Position Sensor A Circuit High Input

    P0339....Crankshaft Position Sensor A Circuit Intermittent

    P0340....Camshaft Position Sensor 'A' Circuit (Bank 1 or Single Sensor)

    P0341 Camshaft Position Sensor 'A' Circuit Range/Performance (Bank 1 or Single Sensor)

    P0342....Camshaft Position Sensor 'A' Circuit Low Input (Bank 1 or Single Sensor)

    P0343....Camshaft Position Sensor 'A' Circuit High Input (Bank 1 or Single Sensor)

    P0344....Camshaft Position Sensor 'A' Circuit Intermittent (Bank 1 or Single Sensor)

    P0345....Camshaft Position Sensor 'A' Circuit (Bank 2)

    P0346....Camshaft Position Sensor 'A' Circuit Range/Performance (Bank 2)

    P0347....Camshaft Position Sensor 'A' Circuit Low Input (Bank 2)

    P0348....Camshaft Position Sensor 'A' Circuit High Input (Bank 2)

    P0349....Camshaft Position Sensor 'A' Circuit Intermittent (Bank 2)

    P0350....Ignition Coil Primary/Secondary Circuit

    Nov 17, 2010 | Kia Amanti Cars & Trucks

    1 Answer

    High idle stalls at lights code for crank sensor


    Crankshaft and Camshaft Position Sensors Camshaft Position Sensor Engine timing is determined from the relationship between the crankshaft and camshaft. This relationship is maintained by a timing chain or timing belt. The Engine Management System does not control engine timing but it does monitor the relative position and speed of these shafts by monitoring signals generated by sensors. The Engine Management System (EMS) uses signals generated by the camshaft position sensor to synchronize fuel injection to the valve sequence and for the on-board diagnostic procedure for misfire detection. The EMS energizes the injector at or near the time the intake valve opens. For misfire diagnosis, the EMS compares the number of camshaft sensor reference pulses and the number of crankshaft position sensor reference pulses received. If the EMS receives an incorrect number of pulses Diagnostic Trouble Codes (DTC’s) should be stored in the EMS.
    If the camshaft position sensor or circuit is faulty most engines will start. Some engine management systems will then default to a pre-programmed injector firing sequence. All injectors may be energized simultaneously or all of the injectors on one bank may be energized at the same time. If the CMP data is required for misfire detection and reliable CMP data is not present misfire detection would probably be suspended.
    Related Symptoms The following symptoms can be caused by an intermittent wiring connection or faulty signal to the EMS:
    • Extended crank time with a cold engine
    • Intermittent rough running
    • Unstable idle
    • Bucking
    • Hesitation
    • Stumble
    • Chuggle
    • Poor fuel economy
    • Stalling on acceleration
    Crankshaft Position Sensor Engine speed is a very important input to the Engine Management System (EMS). Crankshaft speed and position are the basis for many calculations made by the computer. Crankshaft position values are transmitted to the computer by pickup coils also known as Permanent Magnet (P/M) generators, hall-effect sensors or optical sensors. The Crankshaft Position Sensor (CKP) also known as engine speed sensor is located in close proximity to the crankshaft.
    In addition the EMS uses minute variations in the CKP sensor data to determine engine misfire. The EMS uses this information in conjunction with the camshaft position sensor to perform misfire diagnostics.
    Related Symptoms: No Start/Intermittent Start Condition – Can be caused by a faulty crankshaft position sensor due to loose connections, bad grounds, high resistance in the circuit, or opens in the circuit

    Jun 23, 2009 | 2004 Nissan Altima

    2 Answers

    Engine misfire or flat spot when accelorating put occasionally


    the camshaft position sensor is right around the crankshaft. there is a magnetic wheel at the end of the camshaft that the sensor uses to produce the signal.

    Jun 10, 2009 | 2005 Ford Focus

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