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Ground cable causing ignition coils to melt Forums > > Ground cable causing ignition coils to melt Ground cable causing ignition coils to melt
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Old 09-29-2016, 08:10 AM
conallq conallq is offline
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2003 Sentra SE-R
Join Date: Sep 2016
Posts: 1
Default Ground cable causing ignition coils to melt

I've had my nissan sentra SER 2003 for over a year now and recently it began to stutter when accelerating. It would shake the whole car and was sporadic in times that it would happen. Sometimes it would almost slide back into normal acceleration and things would be fine. I let this problem progress over a few weeks and recently I wasn't able to accelerate over 2.5 RPM's without violent shaking. The next day it drove fine and I was able to hit 2.5 with ease.

Took it into the mechanic and they informed me that the ground cable has failed and thus it is melting the ignition coils. Mechanic also stated this is a known issue with this model of car.

Estimated cost of fix is $847.00.

Do you believe this is an accurate diagnosis? Has anyone else experienced these issues.

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Old 09-30-2016, 02:16 PM
bennyb53's Avatar
bennyb53 bennyb53 is offline
2002 Altima
2002 Altima
Join Date: Jan 2011
Location: Hawaii
Posts: 2,104

1. You can check the battery ground cable yourself. Go under the engine and inspect if ground cable is still connected.
2. Most likely one ignition coil is out. Shop online for ignition coils for your vehicle. I am guessing you have a QR25 (2.5L) engine. Also inspect spark plugs.
3. To find out which ignition coil is faulty. Do the Power Balance test. With engine running or at idle, unplug the ignition coil harness one by one starting from #1 cylinder. After you unplug the coil the engine stumble or even stall, that coil is good. If the engine RPM does not change that ignition coil has failed and must be replaced. To further confirm, do a spark test. It is very easy to replace ignition coils. Simply unplug the harness, remove the 10mm mounting bolts, and pull the coil straight out. Of course you have to remove the engine cover first. good luck.
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Old 10-01-2016, 04:59 AM
smj999smj's Avatar
smj999smj smj999smj is offline
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2006 Pathfinder
2003 Frontier King Cab
2003 Frontier KC SVE 4x4
Join Date: Jun 2012
Location: Prospect, VA
Posts: 1,842

Just because the battery ground cable is good and connected, it doesn't mean the ground circuit for the ignition coils is good. You'd have to check the ground circuit for the coils from the coil harness connector to the grounding point of the circuit, looking for excessive resistance through the circuit and performing a voltage drop check at the bolt where it's grounded.
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cable, causing, coils, ground, ignition, melt

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