Question about 1991 Nissan 300ZX

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Ok, for some odd reason two of my ignition coils dont seem to be getting any power to them, i changed out ever plug with new ones and also new ignition coils, its a 91 TT, im jus as lost trying to explain my situation...but this is as far as i can explain...

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Change the crank sensor

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How do i change ignition coil number 5 on a 2009 jeep grand cheerokee


Do you know which cylinder is # 5? You will probably have to remove engine cover to see anything. If coil on plug ignition, one coil for each spark plug. on the spark plug coil in question, remove electrical connector from coil, remove hold down bolt from coil, you may have to twist coil to get boot loose from spark plug.
What is liter size of engine?

This is for 4.7 L engine. It appears jeep rwd has odd and even banks like GM and Chrysler. 1357 for driver side bank. 2468 from front to back on passenger side bank.

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I have a 2001 Suzuki liana 1.6l and when taking off from the lights the car faltered and now has a lack of power.


scan it yet? that be first.
you put in new cop coils before new spark plugs/
why?

btw that effect is called misfire, when it misfires, power drops.
example on a 4 cylinder if 1 goes dead, its not 3cylinder engine
with 1/4 loss of power (its less due to 3 dragging 1 dead horse)


There are no less than 50 causes of misfire
#1 all time reasons , bad spark plugs.
due to never ever getting tuneup on time.
#1 for 100 years, and running.
your engine dont read statistics so can be 49 more.

Jul 23, 2016 | Suzuki Cars & Trucks

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My 4 cyl mustang is working with only one cylinder spark plugs, cables and ignition coils are new what is it?


When you have Coil Packs not firing Spark... it's usually due to one of two reasons: 1.) the Coil Pack is BAD 2.) the Ignition Control Module (ICM) has fried internally and is not activating that specific Ignition Coil within the Coil Pack ...The most common is the ICM ...The probable reason your catalytic conv. gets red hot is due to raw gas being dumped through the exhaust from the no fire on your cyl... Running it like that can cause severe damage to your conv...

Sep 30, 2012 | 1993 Ford Mustang

1 Answer

SKIPPING PROBLEM . SPARK PLUGS & WIRES HAS BEEN DONE. THERE'S NO 12 VOLTS AT THE COIL CONNECTOR PLUG WITH THE KEY ON. LYMAN


Sound like a ground problem; the fastest way to identify the Power and Ground Circuits is using a wiring diagram. If you don't have one you'll have to find out by trial and error as you probe each circuit.

The power circuit is tested with the Key On and Engine Off. Place one end of your multimeter or Test Light on the Battery Negative Terminal and with the other end, probe the Power Circuit. Turn the Key to the Run position. If the Power Circuit is OK, the Multimeter will show 12 Volts or the Test Light will light up. Here are the possible results:
* You got 12 Volts on the Power Circuit
Good, this is a good sign. The next step is to check the Ground Circuit of the Coil on Plug connector that you're testing.

* No Power in only one Ignition Coil
Without 12 Volts, the Coil-on-Plug Ignition Coil will not work, thus you have just eliminated that specific Ignition Coil as the source of the fault. Replacing the Ignition Coil with a new one will only be a waste of time and money since, without Power the new one will not Spark.
Since the Power Circuit is shared by all of the coils on the majority of Coil-on-Plug Ignition Systems. The most likely cause will be an open short in that Ignition Coil's Power Circuit.
You'll have to consult your Repair Manual's wiring diagrams to make sure how everything is wired up.
After repairing the short, re-do the Spark Test to verify the Ignition Coil is now working.

* No Power at any Ignition Coils
The fuse or relay that supplies this voltage is blown or BAD.
You'll have to consult your Repair Manual's wiring diagrams to see where this fuse and/or relay is located and replace as necessary.
After replacing the blown fuse or the defective relay. Retest the Ignition Coil.

Them, the Ground Circuit is tested with the Key On or Off. It doesn't matter because this is a Chassis Ground. Place one end of your multimeter or Test Light on the Battery Positive Terminal and with the other end, probe the Ground Circuit. If the Ground Circuit is OK, the Multimeter will show 12 Volts or the Test Light will light up.

* You got Ground
Good, now the next step is to verify that the Coil-on-Plug Ignition Coil is receiving the Triggering Signal. This info belongs to the next section of this article.

* No Ground in only one Ignition Coil
Without this Ground, the Coil-on-Plug Ignition Coil will not work, thus you have just eliminated that specific Ignition Coil as the source of the fault. Replacing the Ignition Coil with a new one will only be a waste of time and money since, without Ground the new one will not Spark.
Since the Ground Circuit is shared by all of the coils on the majority of Coil-on-Plug Ignition Systems. The most likely cause will be an open short in that Ignition Coil's Ground Circuit.
You'll have to consult your Repair Manual's wiring diagrams to make sure how everything is wired up.
After repairing the short, re-do the Spark Test to verify the Ignition Coil is now working.

* No Ground at any Ignition Coils
This usually happens thru' human error in most cases and is a very rare thing. Usually the engine was replaced and this ground was not re-attached.
You can Ground this circuit with a jumper wire. Jumpering to Ground just one Coil-on-Plug Ignition Coil should provide Ground to all of them (consult your Repair Manual's Wiring Diagrams to be sure).
With this jumper wire to Ground attached, crank the vehicle.
If in fact the Ground Circuit does have an open short, this (the jumper wire to Ground) should make the vehicle start, or at least get the Ignition Coil to Spark.
Repair the open short and retest for Spark or retry starting the vehicle.


Hope this helps. Keep us updated.

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1 Answer

What could be the problem in a 1993 Saturn SL1 car that does not start. It sounds like electrical. When the ignition switch is swung, the engine sounds like it is out of fuel but its not. The relays and...


Well it is 17 years old, many things could be bad. There is a hook up under the dash to connect an analyzer, that would be a place to start. There are two coils, under the coils is an ignition module, that could be bad.

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If you replaced the coils the spark plugs should also be change. The plugs are more than likely bad.

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Hi,yes coils tend to heat up and cause the car to die ,your diagnostic seems accurate .!good luck.......

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