Question about 2001 Cadillac Eldorado

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How do you check for which coil pack is the faulty one?

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You should have a trouble code stored in the computer telling you which cylinder is not producing power.

Posted on Feb 11, 2014

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Posted on Jan 02, 2017

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2 Answers

On a 2006 Dodge Gran Caravan 3.8, I have no spark on #6 contact on coil pack, when pulling of the boot. Do coil packs go bad? Any other possibilities?


My thinking is, if all the other cylinders have spark, the coil pack is faulty. I'd also change spark plugs and plug wires. Check good primary voltage to coil pack. I didn't think to look for dedicated ground, but, check that also, where applicable.

May 26, 2017 | Dodge Cars & Trucks

1 Answer

Coil packs I replaced #4 and #5 went out. Why?


How to Tell if You Have a Faulty Coil Pac How a Coil Pack Works When creating a spark at the spark plug, the fire must initiate from a high voltage supply, so as much fuel as possible burns in the cylinder. Whenever the combustion process is started, the coil pack builds up the energy, as much as 50,000 to 75,000 Volts. When the electronic control module (the car computer) sends the signal to the ignition control, the voltage is released from the coil pack through the spark plug cables to the spark plug.
When the spark travels to the spark plug, it jumps from the spark plug gap to the ground, causing an explosion of the fuel air mixture inside the cylinder chamber Coil Pack Problems Usually, if a coil pack is bad, there will be a loss of fire or spark in one or more cylinders. This causes what's commonly referred to as misfiring. Misfiring can cause drag on the crankshaft, and usually results in a very poor performing engine Common Symptoms of a Faulty Coil Pack A faulty coil pack will generally have symptoms similar to a faulty spark plug. Some of the most common tell tale signs that a coil may be defective include:
  • A rough idle
  • An unexplainably louder-than-usual engine
  • A noticeable lack of power
  • A significant drop in RPMs while accelerating for no apparent reason
  • A blinking or intermittently activating check engine light
  • An active gas warning light when the vehicle has plenty of gasoline
  • Smoke from the exhaust emitting intermittently, instead of in a steady strea How to Test a Coil Pack Fortunately, there is an easy way to test the coil packs in your vehicle and make sure they're working as they should. You need to use ohm meter to test the coil pack for continuity. Make sure you have the approximate ohm values for the coil pack. To find this information, research your car's engine on the Internet or purchase a Chilton's or Haynes manual to find out what the mega ohms reading on the coil pack should be. What Coil Pack Works with a Rotary Engine? Most rotary engines require a different type of ignition coil pack. Below are two, one for a standard replacement, and one that is a higher voltage performance type coil pack.
    Original Equipment Replacement
    Beck Arnley is a well known name in the automotive ignition parts industry. They are favored by many mechanics, especially those that work mostly on import cars. The Beck Arnley 178-8025 rotary engine coil pack is a direct replacement for original equipment parts on older Mazda cars with a rotary engine. You can expect to pay about $55 for one.Performance Replacement
    M&W Ignition Systems is a fairly well known name in the import performance market. Their part number PAK005 is a high performance ignition coil pack for the performance enthusiast who isn't afraid to spend a little more on a high quality high performance part. With prices running around $245 for a double coil pack for direct fire ignitions, these coil packs will deliver years of excellent performance.
    When ordering a coil pack for your rotary engine equipped car, you need to know the year and model as well as the engine displacement to ensure you are given the correct parts.

Sep 30, 2016 | Cars & Trucks

1 Answer

What are codes p1401 p0302 p0305 p1409 p0301


P1401 Differential Press Feedback EGR Circuit High Input
Your EGR port is plugged. Replace your EGR valve, and clean the ports
A code P0302 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
  • A code P0305 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
    • A code P0301 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
      • A code P0302 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
        • p1409
        • EGR Vacuum System Leak - Read Our Article on EGR Valve Codes For Help With This Oldsmobile Check Engine Light Code

Sep 25, 2014 | Cars & Trucks

1 Answer

How to check coil pack"


Easiest way is if you have another working coil pack and switch it out with the suspected faulty coil pack. Say you have a problem that is with the coil pack that covers the 1-3 switch it with the one that covers 2-4. If the problem does not switch to where you put the faulty coil pack... it's not the coil pack. Replacement coil packs can be found at an auto part store or if you need a cheap replacement you can usually find one at a junkyard.

May 27, 2014 | 1998 Kia Sephia

2 Answers

I dont have any spark. have power to the coil pack just nothing past that. what to do??


Check the crank shaft postioning sensor. If you are getting power to the coil pack and there is no power coming out of the coil pack the coil pack might be bad or have corrioson between the coil pack and the mount. Thanks

Mar 07, 2011 | 1999 Mitsubishi Eclipse

1 Answer

I GOT NO FIRE ON THE PLUGS


The spark gets power to spark from coil packs.If the connection between coil pack to spark plug is weak or loose then it will not fire.But if the coil pack as well as the connection between coil pack to spark plugs checked ok then its faulty or dirty spark plugs.Clean the spark plugs with the carb cleaner liquid and let it completely dry.Then check.Also check the voltage between coil pack to spark plugs.If both checked out ok then the other possibility can be weak crank shaft sensor. Thanks.Helpmech.

Nov 12, 2010 | 1995 Dodge Dakota

2 Answers

I was driving and it just died,we now found we do not have any spark on driver side,can you tell me what it may be,or what we should try to fit it.it will not turn over.Thank you sherry


No spark.This is indication of faulty spark plugs.But spark plugs get power to spark from coil pack. So get the connection between coil pack to spark plugs checked.If it checked out ok then its faulty spark plugs that has to be replaced,but if coil pack has no power then its faulty coil pack that has to be replaced.But if coil pack and spark plugs both checked out ok then this problem is fuel related problem.In this case the fuel pressure needs to be checked.The fuel pressure can be easily checked at any local car garage.If its low then its faulty fuel pump as well as clogged fuel filter,which has to be replaced. The voltage for spark plugs and coil pack in voltmeter will show 12 volts.Its a 12 volt part.If there is no or low volt then there is problem with the part. ------------------ Keep updated with any more queries.Thanks.

Oct 18, 2010 | 1998 GMC Jimmy

1 Answer

No spark runns fine then loses spark wait 10 minutes starts


The spark plugs receives power to spark from coil pack.Check the power at the coil pack and also check the voltage at the coil pack with meter.If the coil pack shows proper power as well as voltage then its fault in spark plugs.Otherwise its faulty coil pack.The coil pack receives power from battery.so also check the voltage of the battery it should be exact 12 volt.
If the battery shows low voltage then the battery needs to be re-charged.
Then check out.
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May 20, 2010 | 1992 Pontiac Bonneville

1 Answer

What will cause the coil packs not to put out spark


faulty cam sensor, faulty coil pack, or coil power circuit failure. Have this checked by an experienced tech. Hopefully this helps!!

Apr 01, 2010 | 2000 Oldsmobile Intrigue

4 Answers

I have a ford explorer 99 but it's giving a error code PO306 what do u think it is


It sounds like a misfire. Check spark plugs 5 and 6. It could be bad fuel, bad plug wire, or weak coil. Check the fuel injectors as well. Other possible causes could be an egr valve stuck open, vacuum leaks, low fuel pressure.

Feb 17, 2010 | 1999 Ford Explorer

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