Question about 2004 Dodge Ram 1500

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Hemi missfire cylinder 3 multiple misfires, replace plugs, checked injectors, checked coil pack

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  • Contributor
  • 46 Answers

I have an 07. If this were mine, I'd replace that injector plus the pack. Not likely to be wiring, or the computer. I assume the dealer can't fix? Let me restate my order of business: Have dealer diagnose with their equipment, then they fix. Or as a cheaper alternative, have them diagnose, then you fix. Or as a last resort, my first two options. Parts changing as a way to troubleshoot is fun and exciting, as long as you luck onto it the first time. Otherwise, it's unnecessarily costly, and it sucks. :)

Posted on Nov 27, 2013

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  • Dodge Master
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Could be bad coil,bad wires,

Posted on Nov 27, 2013

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6ya6ya
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justuscc
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SOURCE: No Start, No Spark, for Grand Caravan 3.8L

we get remans bad out of the box......... good luck

Posted on Sep 26, 2008

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SOURCE: 2004 Neon SXT cylinder misfire

TRY REPLACING THE CRANKSHAFT POSITION SENSOR..HAVE SEEN THESE CAUSE MISFIRES AND LOW VOLTAGE DTCS AS PCM THINKS VEHICLE IS NOT RUNNING..ALTERNATOR MAY NOT BE PUTTING OUT PROPERLY

Posted on Jul 07, 2009

autoacworks
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SOURCE: 2004 dodge ram 1500 5.7 hemi. misfire on multiple

sounds like you need an engine my friend or a good mechanic to rebuild that one

Posted on Nov 21, 2010

  • 1 Answer

SOURCE: Enging code came up on

ox546 i had the same problem but mine said i had a misfire on cyl 6 and ign coil a circut malfunction my coil on my # 1 cyl was melted so i changed it and it fixed it. some where your # 3 cyl is connected to another cyl i'm not shure which one but i know the #1 cyl is connected to the #6 cyl some way

Posted on Dec 17, 2010

  • 249 Answers

SOURCE: Dodge Caravan Fuel Injectors gone bad?

if you can get a good set of used injectors you should change all of them.

Posted on Nov 09, 2011

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PO300 multiple misfire detected it was saying # 3 Cylinder changed spark plugs and wires,coil pack,# 3 fuel injector, any suggestions


Do a compression check, there is a chance that you are down on compression on #3. Or make sure that your injector is firing on #3. Could have a bad wire going to the injector.

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The coil pack is located on the wiper side of the engine, mounted on the rocker cover with 3 bolts. As they age, cracks form on the casing, allowing moisture and dirt to enter. This causes internal shorts and lead to misfire, causing the fouled plugs.
Remove the wiper cowl to expose it. Replace the coil pack, and replace the cables one at a time.

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What causes engine misfires to stay after new plugs and coil packs?


Try swapping the coil packs around - like swap #1 with #2, and swap #6 with #5, see if the misfires MOVE with the coil packs swapped to the new cylinders or if they stay with the cylinders. If they move with the coil packs, the new coil packs are bad. If they stay with the cylinders, there's a problem with those cylinders. You DID replace that camshaft sensor, right?

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Random multiple misfire P0300, P0302, P0304 on 2006 Kia Rio


A competent mechanic will check all probable causes associated with these DTC codes.
Code P0300: Random-Multiple misfire detected. Probable causes:
1. Vacuum leaks, damaged hoses, or improper routing
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3. Ignition system - Ignition module, coil, spark plugs and wires
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Code P0302: Cylinder 2 misfire detected. Probable causes:
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Code 0304: Cylinder 4 misfire detected. Probable causes:
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Be sure the invoice enumerates all of these probable causes as having been checked. Also, some of the replacement parts installed earlier may be faulty.

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Misfire in number 3 and number 4 cylinders


Misfire is not always from coil. It could be from spark pug wire and injector.
Solution:
-Test the injector at the misfire cylinder. Is it within specification...?
No.>>> The injector is bad. Replace new one.
Yes. the injectors are good and within its specification.
-Check the plug wire. it might be broken and spark to ground or too much resistant. If so replace it.

Mai Lor

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Mazda 2002 MPV cylinder 3 missfire


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Oct 31, 2012 | 2002 Mazda MPV

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Engine cranks but wont start has an obd p 300 &p304 help me


P0300 Random/Multiple Cylinder Misfire Detected, the 304 is for cylinder number 4 any of these could be wrong If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors. Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open

Jun 21, 2011 | 1996 Eagle Vision

1 Answer

2005 Grand Cherokee 4.7L. When started multiple misfires cyl 1,3,5,7. After running about 1 minute, misfires disappear. Code p0300, sometime accompanied by p0303


P0300 is Multiple Misfire and P0303 is one specific misfire in the cyl #3.

A code P0303 may mean that one or more of the following has happened:
* Faulty spark plug or wire
* Faulty coil (pack)
* Faulty oxygen sensor(s)
* Faulty fuel injector
* Burned exhaust valve
* Faulty catalytic converter(s)
* Running out of fuel
* Poor compression
* Defective computer

Possible Solutions:
* If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.
* If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.

Hope helps.

Mar 07, 2011 | Jeep Grand Cherokee Cars & Trucks

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