Question about 1984 Chevrolet Monte Carlo

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No spark leaving coil

Power at coil but no spark coming from the coil, have tried new coil. any answers?

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  • viper_knight Dec 09, 2008

    we are working on a 1991 Chevey Cavaleir. There is NO spark. We replaced the Spark plugs/wires,ECM,Coil Pack, crank sensor, and shecked the fueses and replaced what need replaced.

    What happend was this I want to the store shut the car off came back out and it would not start back up. I wait two weeks before trying to start it again. A friend checked it for spark there was none. so he call a guy he knew that worked on cars and that is how we started replace everything above.
    When the Crank Sensor was removed it fell apart in there so thing had to be taken apart to get the rest of it.

    Can anyone help ??? We are all at a lost....

  • Anonymous Feb 10, 2009

    my 2001 cavalier wont start have no fire at plugs and no fuel pump

  • yadayada
    yadayada May 11, 2010

    Have you checked for a cranshaft signal, if there is not one the coil will not fire.

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My 1984 Monte Carlo won't stay running when I take the battery cable off, the alternator tested good- any suggestions?

Posted on Feb 17, 2009

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First determine what ignition sys yu have, is it a DIS, (direct ignition system) which does not have a distributor,

if you have a distributor first i will check the ignition rotor, make sure it is not brned through and if you find that the ign rotor is burned replace the rotor and also the spark plug wires which caused the rotor damage.

secondly if you have a distributor check that the pick up coil is in good condition check for continuity using an omh meter, disconect the wire coming out of the pick up coil (the one in the distributor, not the coil inside the distributor cap!!) and connect an omh meter to it if you have ressistance the the cois contunity is good however make sure that the pick up is not grounded if the pick up is ok the you have either a ignition module in the distributor is bad or the ecm is no good. Hope thsi solves the problem, Good luck ( Roby).

If it is a DIS the the first thing to check is the crank sensor, suing an omh meter and if the sensor is ok most of the time the vehicle's computer (ECM) has to be changed.

Posted on Nov 10, 2008

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Is it a DLS distributorless Coil ? Or does it have a Distributor ? Please inform on the size of engine,year. etc.

Posted on Nov 10, 2008

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Yes , what ewiz says... coil needs triggered..old school with distributor ...new with crank angle sensors and other info to the computer

Posted on Nov 10, 2008

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I have power to my coil but none coming out on my 84 351 Windsor brand new distributor coil is good module came on new distributor I need help ?


Since the coil is getting power you need to get a spark tester or pull a cord of one spark plug and lay it on the engine and have some crank the engine. You should see and hear a spark. If not check fuses and check the ignition module - that is the device that tells the the coil to send a spark. You could also remove the wire from the coil to the dist cap and look for a spark.

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You need 2 people for this task:
Remove the coil from the cylinder but leave it plugged in. The spark plug should be attached to the end of the coil as if it were still in the engine.
Next, position the coil/plug assembly so that the side of the spark plug (Not the hooked end) is touching the metal frame of the engine or chassis. This completes the circuit will allow the spark to ignite.

Now start the engine but DO NOT touch the plug/coil/wire else you will regret it instantly. Look closely at the end of the sparkplug. If the coil is working, you will see a spark. If you dont, try a brand new spark plug. If it still does not work, replace the coil.

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Why do new spark plug coils go bad ?


coils, it has just one coil pack. with 3 coils integrated.
its not COPs.
there are many DTCs related, and not posted.
did you try new spark plugs, then new wires. and then only last the coil pack? check compression.
is it failing the same cylinder? (the will fail in pairs, if the pack is bad)
the pack runs 2 cylinders at once (in series)
injectors leaking or clogged.
since you didnt show the symptoms, i cant help much.


how.?
1 month or 1 year?, or how many miles?
answer 1
time, heat,vibration, oil contamination. (pressure washing them)
not using the dielectric grease on the boots.
getting water in the wells over and over, causing flash over , and carbon tracking.
what make you think they are bad.???
my guess, is you see P03xx codes and assume the means bad coil.?
post symptoms.
post scan data, and DTCs.

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Hi there:
The spark plugs are under the individual ignition coils. There is a coil over each spark plug, one coil for each cylinder.


To remove the spark plugs you will unplug each coil and remove the 10mm nut that holds it down, then slide the coil up and out. Once it's out then you can use a spark plug socket and extension to remove the plugs. It's a good idea to use compressed air (a can of computer keyboard cleaner would work) to blow out the spark plug holes before removing the plugs.

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Also could try other details HERE.


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Hi there:

Are you trying to change coil position? This could mean that one or more of the following has happened:
- Faulty spark plug or wire
- Faulty coil (pack)
- Faulty fuel injector

- Poor compression

- Defective computer


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.


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Power to the coil power coming out of coil, does not reach distributor


Since you do not post what your vehicle make or model is, I can only provide a general answer as to what might be the problem.

By power out of coil, I assume you mean you are getting some spark.

Check the following,

  1. Crack in top of coil causing voltage leak.
  2. Weak coil which might produce visible spark but not be hot enough to reach plugs
  3. Bad coil and or spark plug wires
  4. Cracked or worn distributor cap. (yes, they can wear out even with not moving parts)
  5. Cracked or worn rotor.
Hope this helps.

J


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how can you say that you have power going to the coil and lot leaving it and still say its good?
kinda answered your own question there i think
just my opinion...
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