Question about 2003 Lincoln Navigator

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NOT FIRING ON ALL CYLINDERS

MY CAR IS RUNNING RUFF AND NOT FIRING CORRECTLY I ALSO CANT FIND THE IGNITION MODULE SO I CAN DO A COMPRESSION TEST PLEASE HELP

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  • Lincoln Master
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By now a Check light should have appeared. If you can make it to an Autozone, Advance, or Oreilys for a free scan it will help.

Read up on articles about "Cam Phasers". The DOHC engines had them.

A compression test could cause more problems as the sparkplugs have issues too. Read articles about removing sparkplugs from Ford engines with extended reach plugs.

About the only external part you could try to change would be the crankshaft sensor. It would cause the symptoms you describe.

Posted on Feb 13, 2014

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Posted on Jan 02, 2017

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1 Answer

Where is camshaft position sensor on 2002 Pontiac grand am se ecotec 2.2


This vehicle does not have a cam sensor .The ICM provides a synthesized cam signal to the PCM based on these inputs. The PCM uses the cam signal to synchronize fuel injection.

The powertrain control module (PCM) supplies a signal on each of the ignition control (IC) timing control circuits to the ignition control module (ICM). The ICM fires the correct ignition coil at the correct time based on the signals. The ICM detects if cylinder 1 or cylinder 3 is on the compression stroke by sensing the secondary voltage and polarity of each side of the ignition coil. The ICM detects this voltage with sensing circuitry integrated into each ignition coil. The higher voltage is on the compressing cylinder. This is called compression sense ignition. The ICM provides a synthesized cam signal to the PCM based on these inputs. The PCM uses the cam signal to synchronize fuel injection.
This system consists of the following circuits:
• An ignition voltage circuit
• A ground circuit
• A camshaft position (CMP) sensor signal circuit
• An IC timing control circuit for cylinders #1 and #4
• An IC timing control B circuit for cylinders #2 and #3

DTC P0340
This ignition system does not use a conventional camshaft position (CMP) sensor that detects valve train position. The ignition controls module (ICM) detects when #1 or #3 cylinder has fired on the cylinders compression stroke using sensing circuitry integrated within each coil. The sensing circuit detects the polarity and the strength of the secondary voltage output, the higher output is always at the event cylinder. The ignition control module (ICM) sends a CMP signal to the powertrain control module (PCM) based on the voltage difference between the event and waste cylinder firing energy. This system is called compression sense ignition. By monitoring the CMP and crankshaft position (CKP) signals, the PCM can accurately time the operation of the fuel injectors. If the PCM receives an intermittent CMP signal from the ICM, the CMP Resync Counter on the scan tool will increment. When the PCM cannot use the information from the CMP signal, a DTC will set. DTC P0341 sets when the PCM detects too many CMP Resyncs within a certain amount of time.

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I have a 1997 saturn sw2 that stopped runnuing changed fuel pump wont idle error code #4 cylinder is miss fireing changed ignition module car starts runs ruff changed spark plugs & wire set


You need to make sure the cylinder is getting fuel and that it doesn't have a vacuum leak at the intake that is leaning it out and causing a misfire, if that checks ok then determine if the #4 cylinder has acceptable compression as compared to the other three, all cylinders should been within 5% of the cylinder with the highest pressure on test.

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Multiple misfires random misfires


Do a Cylinder Leak Down Test --to see if the valve are shot & leaking

You can also do an electronic cylinder contribution test

Then if the all seal, check the timing belt

After that check for vacuum leaks with evap smoke machine

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Engin runs ruff after a valve job


Make shore valve timing is correct compression test all cylinders same new spark plugs set ignition timing check ignition leads and vacuum hoses adjust tappets .make sure crank shaft on TDC cam shaft on number one cylinder valves close and cam pulley on marks belt tide fit distributor firing number one cylinder line up rotor and distributor cup lead to that .

Sep 21, 2012 | 1986 Chevrolet Camaro

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It is running ruff, wants to cut off. Using more


Fuel pump in gas tank, more then likely not fuel pump, do fuel pressure test should have 13 -15 psi fuel pressure, Pull codes and data get reading out of M.A.P sensor this one at like a choke, also from C.T.S sensor also acts like a choke, check for a misfire 1st pull one spark plug wire at a time.the one that not fireing chould be a defective wire or bad cylinder compression ( do cylinder compression test ). Good luck,hope this was very helpful.

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I am having troubles with my 1999 Monte Carlo, it's seems smogged down, all of the exhaust system checked out good, I pull #3 and #6 spark plug wires off with the car running, no change, but coil checked...


I would be doing a compression test , could be burnt valves or a broken camshaft . I have seen the V6 3.8l Buick engines snap camshafts just in front of the 2 rear cylinders this causes the front 4 cylinders to work perfect but the back 2 do nothing at all.
Do the compression test and let me know what your readings are ......
Hope this helps

Jul 08, 2009 | 1999 Chevrolet Monte Carlo

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Mis fires have changed spark plugs spark plug wires and ignition control module


Please describe miss fire? or do you mean it has a miss? cross fire occurs when plugs are firing before or after they are supposed to if it's missing then that's another issue could you please give more detail?

Jun 27, 2009 | 2003 Chevrolet Impala

1 Answer

Timing the cams and crank with a belt


  1. Note: Electronic Ignition engine timing is entirely controlled by the PCM. Electronic Ignition engine timing is NOT adjustable. Do not attempt to check base timing. You will receive false readings.

The CKP sensor is used to indicate crankshaft position and speed by sensing a missing tooth on a pulse wheel mounted to the crankshaft. The CMP sensor is used by the COP Integrated EI System to identify top dead center of compression of cylinder 1 to synchronize the firing of the individual coils.
  1. The PCM uses the CKP signal to calculate a spark target and then fires the coil pack(s) to that target shown in Figure 51. The PCM uses the CMP sensor not shown in Figure 51 on COP Integrated EI Systems to identify top dead center of compression of cylinder 1 to synchronize the firing of the individual coils.
  1. The coils and coil packs receive their signal from the PCM to fire at a calculated spark target. Each coil within the pack fires two spark plugs at the same time. The plugs are paired so that as one fires during the compression stroke the other fires during the exhaust stroke. The next time the coil is fired the situation is reversed. The COP system fires only one spark plug per coil and only on the compression stroke.

    The PCM acts as an electronic switch to ground in the coil primary circuit. When the switch is closed, battery positive voltage (B+) applied to the coil primary circuit builds a magnetic field around the primary coil. When the switch opens, the power is interrupted and the primary field collapses inducing the high voltage in the secondary coil windings and the spark plug is fired. A kickback voltage spike occurs when the primary field collapses. The PCM uses this voltage spike to generate an Ignition Diagnostic Monitor (IDM) signal. IDM communicates information by pulsewidth modulation in the PCM.
  1. The PCM processes the CKP signal and uses it to drive the tachometer as the Clean Tach Out (CTO) signal.

2.5L V6

The ignition system consists of an ignition coil, spark plug wires and spark plugs.
The crankshaft position sensor signal is the basis for ignition timing calculations. The alternating voltage signal from the crankshaft position sensor is digitized by a pulse former within the powertrain control module. This digitized signal is then used to position the closing time of the primary circuit of the ignition coil.
Ignition timing is determined by the powertrain control module in response to engine operating conditions based on stored data tables or maps. Once ignition timing has been determined, the powertrain control module interrupts the current to the primary circuit of the ignition coil thus triggering the ignition spark which is supplied to the cylinders through the spark plug wires and spark plugs.
The ignition coils are triggered by the powertrain control module in pairs (cylinders 1 and 5, cylinders 4 and 3 and cylinders 2 and 6) sending one ignition spark to the firing cylinder and one ignition spark to the corresponding cylinder on the exhaust stroke. This ensures that any unburnt fuel residues remaining in the cylinder on the exhaust stroke are re - ignited to provide cleaner exhaust emissions.
---------------------------------------------------------------
2.0L 4 cynder

The ignition system consists of an ignition coil, spark plug wires and spark plugs.
The crankshaft position sensor signal is the basis for ignition timing calculations. The alternating voltage signal from the crankshaft position sensor is digitized by the powertrain control module. This digitized signal is then used to position the closing time of the primary circuit of the ignition coil.
Ignition angle is determined by the powertrain control module in response to engine operating conditions. Once ignition angle has been determined, the powertrain control module interrupts the current to the primary circuit of the ignition coil thus triggering the ignition spark which is supplied to the cylinders through the spark plug wires and spark plugs.
The ignition coils are triggered by the powertrain control module in pairs (cylinders 1 and 4 and cylinders 3 and 2) sending one ignition spark to the firing cylinder and one ignition spark to the corresponding cylinder on the exhaust stroke. This make sures that any unburnt fuel residues remaining in the cylinder on the exhaust stroke are re - ignited to provide cleaner exhaust emissions.
------------------------------------------------------------------------------------
Integrated Electronic Ignition System The Integrated Electronic Ignition (EI) System consists of a crankshaft position (CKP) sensor, coil pack(s), connecting wiring, and PCM. The Coil On Plug (COP) Integrated EI System uses a separate coil for each spark plug and each coil is mounted directly onto the plug. The COP Integrated EI System eliminates the need for spark plug wires but does require input from the camshaft position (CMP) sensor.
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Apr 05, 2009 | 1998 Ford Contour

2 Answers

Running fine then wont'nt start


You will have to pull a spark plug out to check that you have spark when cranking the engine,while you have the plug/s out do a compression test to determine health of engine and wether it is in fact giving compression,eliminates other potential faults if compression is good.If you have compression(around 140 ish)and introduced fuel and it wont fire up it only leaves electrics as the fault.3 major engine requirements to run Fuel,Compression,ignition.When checking spark at night is best as you can easily see wether you have the correct type of spark,Blue and if its quite you will hear the spark as well.Your fault is consistant with ignition module,coil or lack of power to ignition.Faulty modules will give a spark but its too weak to ignite fuel and the spark will be yellow in color.Let me know how it goes.Good luck

Nov 17, 2008 | 1996 Volkswagen Golf

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