Question about Pontiac Grand Am

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I have a 1996 Grand Am 2.4 Quad 4 motor. Problem is cylinder misfire on #1 and #3. I have changed coils, coil tower, and ignotion control module. When I checked compression: #1 cylinder - 200 PSI #2 cylinder - 180 PSI #3 cylinder - 200 PSI #4 cylinder - 125 PSI. What is next? Thanks

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  • crabbyass727 May 23, 2009

    What kind of help is that

  • crabbyass727 May 23, 2009

    have a 1996 Grand Am 2.4 Quad 4 motor. Problem is cylinder misfire on #1 and #3. I have changed coils, coil tower, and ignotion control module. When I checked compression: #1 cylinder - 200 PSI #2 cylinder - 180 PSI #3 cylinder - 200 PSI #4 cylinder - 125 PSI. What is next? Thanks this is quality information and should not receive text book info from another website.

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Ok, i recommend checking the following areas for faults--

INspect the Ignition timing. make sure that it is correct. incorrect ignition timing will induce these types of symptoms.

Inspect the entire fuel injection system for clogged injectors and rails.

Inspect the Intake Manifold gasket(s). there may be a leak or the gasket may be damaged or worn. replace if damaged.

Inspect the valve assembly. you valves could or May be Burned, worn, or sticking due to faulty or bad valve springs. if the exhaust valve is sticking , it will cause a misfire.

NOTE-- the ignition timing is controlled by the ECM/PCM in this build so, you should inspect the ECM/PCM for faults as well. replace if found to be faulty.

Pressure in the cylinders seems to be optimal at most so, the rings seems to be in good condition.

Posted on May 23, 2009

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2006 grand prix gxp 5.3. When you are driving normally it will miss from 50mph and up. When you punch it it doesn't miss a beat. I cleaned the maf sensor and air filter, Plugs were replaced.


It's probably a coil breaking down , have a scan tool hooked up an have misfires checked to see which cylinder is missing .
Ignition Coils
Each ignition coil has an ignition 1 voltage feed and a ground. The engine control module (ECM) supplies a low reference and an ignition control (IC) circuit. Each ignition coil contains a solid state driver module. The ECM will command the IC circuit ON, this allows the current to flow through the primary coil windings for the appropriate time or dwell. When the ECM commands the IC circuit OFF, this will interrupt current flow through the primary coil windings. The magnetic field created by the primary coil windings will collapse across the secondary coil windings, which induces a high voltage across the spark plug electrodes. The coils are current limited to prevent overloading if the IC current is held high too long. The spark plugs are connected to their respective coils by a short secondary wire. The spark plugs are tipped with iridium for long life and efficiency.
Drive it long enough like that (with it misfiring ) the check engine light will flash . This is to warn that a catalytic converter damaging event is taking place . This would also set a DTC - diagnostic trouble code
DTC Descriptors ?€¢
DTC P0300 Engine Misfire Detected


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DTC P0301 Cylinder 1 Misfire Detected


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DTC P0302 Cylinder 2 Misfire Detected


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DTC P0303 Cylinder 3 Misfire Detected


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DTC P0304 Cylinder 4 Misfire Detected


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DTC P0305 Cylinder 5 Misfire Detected


?€¢
DTC P0306 Cylinder 6 Misfire Detected


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DTC P0307 Cylinder 7 Misfire Detected


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DTC P0308 Cylinder 8 Misfire Detected

Apr 26, 2016 | Cars & Trucks

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Misfiring Ford Escort ignition fault finding


1999 Ford Escort firing order and ignition troubleshooting.<br /><span>Refer to the diagram. Cylinders are connected as shown on the diagram in blue. 1 goes to cylinder 1(sparkplug furthest from coil pack), 2 to 2, 3 to 3 and 4 to 4(closets to coil pack).<br />To test the coil pack use a digital volt meter. Measure resistance between coil towers for coil 1(marked 1 in red on diagram) Value should be between 12000 and 14500 ohm. Do the same for coil towers 2. <br />Measure resistance between I and C1. If the measurement is more than 5 ohm the coil is defective. Do the same for I to C2.<br />Measuring voltage at I(Ignition start/run) to ground should be 10V.</span><br /><span>I is connected to the 15A engine fuse. The radio interference capacitor is connected between this line and earth at the coil. Disconnect it to see if it cures the misfire.<br />C1 and C2 connect to the powertrain control module. The module earths each line to make its respective coil fire.<br />Bear in mind that aftermarket coil wires may cause problems with misfiring</span> so use OEM parts where possible.<br /><img src="suzman_6.JPG" /><br />

on Nov 17, 2010 | Ford Escort Cars & Trucks

1 Answer

No spark on cyl 3 and 4


What engine ? 2.2 l or 2.4 L. You don't say if any codes are set. no P0303 - P0304 cylinder's 3 & 4 misfire ? or any other ? No the cam sensor wouldn't cause just two cylinders to misfire. The PCM triggers the ICM to turn on an off coil's to build up an collapse the primary voltage inducing the secondary voltage . This engine is equipped with a non-distributor ignition system called the electronic ignition (EI) system. The primary circuit of the EI system consists of the following components:
?€¢
Two separate ignition coils

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An electronic ignition control module (ICM)

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A crankshaft position (CKP) sensor

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Related connecting wires

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The ignition control (IC) portion of the powertrain control module (PCM)
Important: The camshaft position (CMP) sensor is only used for a misfire detection. It is not part of the ignition system. !
How to Test the Ignition Coils GM 2 4L Quad 4

Jan 24, 2015 | 2001 Chevrolet Cavalier

1 Answer

Misfiring on cylinder #3


Misfiring can be cause by ignition coil,spark plugs,wires,engine valve,cylinder compression,
if it's a quad four then crack around the ignition coil. there is 2 coils like 1-4 coil and 2-3 coil
first check spark plug color or foul of gaz
hope it help

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2 Answers

NO POWER REVS UP REAL SLOW SHOWS CODES P0301 P0138 P1687 P0355 PO351


Hi, do you have the 4.7 liter engine with coils on every cylinder? 351 and 355 indicate bad coils on cylinders 1 and 5. You can try moving the coils to see if the problem is the coils themselves or the wiring. If the codes change after moving the coils, replace the coils. These misfires could be the cause of the other codes.


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1 Answer

I have 1996 Dodge Gran Caravan, and it gives me these codes: 27 and 43, what do they mean??


CODE 27 - Injector Control Circuit, output driver does not respond properly to the control signal

Code 27 MIL light options: OBDII
P0201 - Injector #1 Control Circuit
P0202 - Injector #2 Control Circuit
P0203 - Injector #3 Control Circuit
P0204 - Injector #4 Control Circuit
P0205 - Injector #5 Control Circuit
P0206 - Injector #6 Control Circuit

CODE 43 - Cylinder Misfire, or Ignition Primary Circuit

CODE $# MIL options: OBDII
P0300 - Multiple Cylinder Misfire
P0301 - Cylinder #1 Misfire
P0302 - Cylinder #2 Misfire
P0303 - Cylinder #3 Misfire
P0304 - Cylinder #4 Misfire
P0305 - Cylinder #5 Misfire
P0306 - Cylinder #6 Misfire
P0351 - Ignition Coil #1 Primary Circuit
P0352 - Ignition Coil #2 Primary Circuit
P0353 - Ignition Coil #3 Primary Circuit

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1 Answer

I have a random misfire code that comes up. the


is this a quad 4 ? if so you should replace the housing also , double platinum sparks plugs are advised also..

Jan 03, 2010 | 1997 Pontiac Grand Am

1 Answer

Recurring #2 cylinder misfire.


Hello Mr Fixit...If memory serves me right, the PO352 B fault code would indicate #4 cylinder coil and PO352 A for #3. The
Possible causes ...faulty spark plug...faulty spark plug wire..faulty ignition coil pack..faulty PCM...open or short in wiring from PCM to iginition coil pack. To accurately troubleshoot and determine the problem you will need an oscilliscope and a diagnostic scanner. Without these you are basically guessing as to the cause.
The ignition control module is integrated into the PCM and a faulty ICM can definitely cause this trouble code...and i have seen my share of faulty PCM's.
Hope this helps and the best of luck to ya.

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1 Answer

1998 Cavalier No Spark in cylinders 1 & 4


ignition mod. grounds,pcm or timing belt could all be it but, I would have to look at timing first.

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di you change the spark wires? is there a change you changed wires and with that you changes the spark sequence?, if so swap the wires from those cyl.
hope it helps

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