LegitMafiaBoss

Whats a good/safe way to test if an ignition coil has gone bad with doing a diagnostic? I searched.

LegitMafiaBoss

with = without

eric93SE

iTrader: (1)

Inspect the body of the coil for cracks or carbon tracking (a sign of a short to the manifold) if either exists replace them. YOu can also check the resistance of the coil across two of the contacts on the coil (I dont remember what it should be, but you can compare them). There are three tabs on the connector two of them are the primary coil resistance. For the secondary coil you would measure from the tab thats not one of the primary and put the other probe to the output (where the spark plug goes).

But if your coils have more than 70k on them, then I suggest replacing all of them.

Dont ask where to buy them b/c you can do a search.

AC439

The coils are very difficult to diagnose unless you have the "Consult" box from Nissan. You hook that box to a connector to the car and you can selectively disable/enable injectors. When I first had the coil problems, only one coil had a crack (obvious) and I replaced it. Next time the car had problems, I was virtually unable to find anything wrong with the coils by visual check or measuring coil resistance etc. I ended up got the car to a dealer (luckly this is an honest dealer), they used the "consult" box to shut off the injectors one at a time and test drove it. Then they told me two coils were bad. After they replaced the two coils, the car ran fine for another 6 months. Then same problem happened again. I ordered the rest of the three coils from Courtesy Nissan and replaced them and no problem since then. This was more than 3 years ago.