Q: How do you know if the ignition needs to be replaced when you replace the plugs on dodge 5.7 hemi?

asked by on

I am going to change my plugs, how do i know if the ignition coil needs to be replace. Put 55 thousand miles on her so i know it is time for plugs. Have 16 plugs expensive.gas mileage has drop a little and going to try myself but was told it may take 2- 3 hours. Do you automatically change the coils?

Thanks Mark

My car has 130000 miles.
My car has an automatic transmission.

Hi there. To determine if the ignition coils need to be replaced, remove one park plug wire at a time and hook it up to a spark tester gauge and set the gauge to 10 thousands gap and increase it to 60 thousands gap. If the spark does not appear after 25 thousands gap, then the coil is too weak and needs replaced. If you need further assistance with your ignition coils, then seek out a professional, such as one from Your Mechanic, to help you.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. How do you know if the ignition needs to be replaced when you replace the plugs on dodge 5.7 hemi?

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Car making high pitched squeal.

The first issue is you overheated the engine because the cooling fan motor blew the fuse and the radiator split from getting overheated. You replaced the fuse and not the fan and should replace the fan motor also. You replaced...

Q: I have a 2002 Dodge Neon. The car vibrates and steering wheel shakes when car is in park and drive if sitting still

Has anyone suggested that the car could be misfiring? If it is the check engine light should be on. Try turning the key on without starting the engine and see if the Check engine light comes on. This is a...

Q: Sluggish acceleration, excessive gas usage, transmission not shifting properly and real heavy exhaust smoking??? Repair costs???

If the exhaust has been smoking heavily for some time, a plugged catalytic converter would possibly account for at least some of the difficulty you are describing. But, that diagnosis is speculative. You could do a quick check on intake...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...