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rOBERT J Winchell Sr Posted on Jun 22, 2017
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07 Dodge Caravan 3.3 engine miss fire on cylinders 1 and 4

Changed coil pak, plugs, wires cam sensor and crank sensor still miss fire 1 and 4. real weak fire from coil on 1 and 4 what could cause it.

1 Answer

ROBERT GARCIA

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  • Dodge Master 926 Answers
  • Posted on Jun 23, 2017
ROBERT GARCIA
Dodge Master
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2003 Dodge Caravan wont start changed fuel pump, lead wires,coil pack,cam/crank sensor,coolant sensor.Checked all connections and firing order all good .Please Help

You Changed a lot of parts but did not say weather or not the engine is firing or not. if its not, Take an extra spark plug. pull one of the wires from a cylinder and put the plug in it. lay it on the engine block or frame so the plug is touching metal. have someone crank the engine over and see if the plug has spark. This is the easy way if you don't have a tester. MAKE SURE you are NOT touching the plug or wire while cranking the engine over or it will give you one heck of a Shock.

These vehicles are notorious for having shared ground wires that crack or rot and give poor connection to the PCM (power control module)or one of its sensors.
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2003 Santa Fe V 6 miss firing with New plugs and wires

Got a check engine light? Get the codes read to find out if the misfires are on all cylinders or just 1. Could be ign coil, bad crank or cam sensor, or a valve issue
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What is a firing order

This is a quick explanation:

1996 Dodge Caravan
3.3 liter


c17hydro_162.gif

The big rectangles are referencing the engine, the cylinder associated to it's "firing" are the colored circles, and the are also the location of the spark plugs....the smaller lego-looking block is your coil pack. The spark plug wires run from the coil pack to the spark plug on the engine. The wires match 1 to1 or black to black...and so on....

When these are matched to each cylinder/spark plug and it's wire leading to the matching coil pack position, this is it's "firing order". If one of the wires is "crossed" meaning, not 1 going to 1, then the engine will "miss-fire".
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97 dodge neon died replaced parts and still no spark HELP.

YOU NEED TO CHECK DARK GREEN/ORANGE WIRE AT IGNITION COIL WHEN CRANKING ENGINE FOR POWER..IF NO POWER,SHUTDOWN RELAY IS NOT BEING ENERGIZED..THIS ENGINE ALSO HAS CAMSHAFT POSITION SENSOR ON END OF CYLINDER HEAD..ENGINE CONTROLLER NEEDS CAM AND CRANK SIGNALS TO ENERGIZE THE SHUTDOWN RELAY..UNPLUG CRANK SENSOR AND CHECK VOLTAGE ON ORANGE WIRE..SHOULD HAVE APPROX 8V..IF NOT..UNPLUG CAM SENSOR AND SEE IF 8V SUPPLY RETURNS..IF NO POWER TRY UNPLUGGING VEHICLE SPEED SENSOR LOCATED IN TRANS HOUSING WHERE RIGHT SIDE AXLE COMES OUT OF TRANS..IF 8V RETURNS..THE SPEED SENSOR IS SHORTED INTERNALLY..THESE 3 SENSORS SHARE THE SAME 8V SUPPLY CIRCUIT..WITH SPEED SENSOR UNPLUGGED,PLUG CRANK SENSOR BACK IN AND TRY TO START ENGINE..HAVE SEEN THIS SAME PROBLEM AT WORK RECENTLY
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Dead cylinders 2003 sebring

it sounds like you may have the wires on the wrong coil. It should be #1 on the #4 coil, and the #3 wire on the #2 coil. you probably have them backwards so 1 and 3 are firing on the exhaust stroke.
the firing order is 1-3-4-2.
they should be hooked like this.
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