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Tachometer is erratic and it seems to miss under a light load while driving. Has codes P0320. P0300, P0301, P0302, P0303, and P0304. Cleared the codes and P0320 returned. Tests/Procedures: Potential Causes: 1. Check for battery voltage at idle to the ignition failure sensor at terminal 4, Pink/Black wire. 2. Check for battery voltage from the ignition failure sensor to the coils at idle from terminal 3, Tan/Black wire. 3. Bypass the ignition failure sensor by jumping from terminal 4 to terminal 3 and test drive the vehicle to see if the miss still occurs. 4. Scope the signal at the ignition failure sensor at terminal 2, White wire that goes to the instrument cluster for the tach signal. Ignition Failure Sensor

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PEUGEOT 306 1.4 / 1.8(16V) and 406 1.8(16V) MODELS FROM 1997 to 2002 – IDLE CONTROL PROBLEMS. SAGEM SL96 (3 row, 55 pin) ECU suffers from damage to idle control CAUSED BY DEFECTIVE COILS. Replacing ECU WITHOUT REPLACING COILS WILL RESULT IN NEW ECU FAILING WITHIN VERY SHORT TIME FRAME. Sagem SL96 Symptoms 1) Car suffers idle control problems manifested as rough running at idle and stalling at traffic lights. 2) Check engine light usually illuminates with coil pack fail and idle control fault
codes. Diagnostic Checklist 1) Check fault codes – if fault code does not identify which coil has failed, REPLACE BOTH. Coil failure almost guarantees ECU failure but run car with new coil(s) – if idle control is correct – and idle control fault code does not reappear then ECU has probably survived

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VALVE BODY Disassembly 1. Remove line actuator cover bolts. See Fig. 53 . Carefully remove cover and connector plate. Remove line
actuators by twisting line actuator as it is pulled from valve body. 2. Remove through bolts. Separate valve body and separator plate. Remove check balls. See Fig. 54 . Remove manual valve. Remove each valve assembly. Retain in proper order for reassembly. See Fig. 55 and Fig. 56 . Inspection Inspect valves for scoring, nicks and scratches. Inspect springs for damaged or distorted coils. For spring free length specifications, see VALVE BODY SPRING SPECIFICATIONS table. Using a No. 43 (2.25 mm) drill bit, insert drill bit shank into connector plate terminals. Ensure drill bit drags slightly in each terminal. If bit does not drag slightly, replace connector plate. Inspect valve body casting for porosity, interconnected fluid passages and damaged machined surfaces. See Fig. 55 and Fig. 56 .

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1998-2002 Continental FORD: 1998-2006 Town Car 1996-1999 Taurus SHO 2000-2006 LS 1998-2006 Crown Victoria, Mustang
1998-2006 Navigator 2000 Taurus 2002-2003 Blackwood 2002-2005 Thunderbird 2003-2005 Aviator 2003-2006 Focus
2004-2006 Taurus MERCURY: 2005-2006 Five Hundred, Freestyle 1998-2006 Grand Marquis 1997-2006 E-Series, Expedition, F-150
2000 Sable 1999-2006 F-Super Duty 2004-2005 Sable 2000-2005 Excursion, F-53 2005-2006 Montego 2001-2006 Escape 2002-2005 Mountaineer 2002-2005 Explorer 2005-2006 Mariner 2005-2006 Escape Hybrid 2006 Mariner Hybrid LINCOLN: 1997-1998 Mark VIII This article supersedes TSB 04-16-01 to update the vehicle applications and model years.
NOTE
FOLLOW THIS TSB PROCEDURE ONLY IF THERE ARE NO SPECIFIC MISFIRE TSBs/SSMs RELEASED FOR THE VEHICLE SYMPTOM BEING
EXPERIENCED. ISSUEnApproximately 50% of coil on plug (COP) coils returned for warranty do not have a problem.
ACTION The misfiring cylinder must be identified through Self-Test misfire codes or through WDS Power Balance. Rule out base engine problems, rule out fuel problems, and then look at ignition problems (be sure to rule out coil primary circuit issues).
Once the above steps have been completed, and the issue is in the secondary part of the ignition system, the oscilloscope procedure outlined in this TSB can isolate the difference between a coil or spark plug problem.