Q: It's on running on 4 cylinders and it has all new coils and plugs

asked by on

No fire on 4578

My car has 83130 miles.
My car has an automatic transmission.

The first thing to look at is to make sure the 4 and 5 coil wire connections or the 7 and 8 coil wire connections are not crossed. The wire colors for the #4 coil is pink with light blue stripe wire, #5 should have an orange with yellow stripe, #7 white w/pink stripe, and #8 white w/red stripe. If you check these and they are crossed, then they should run okay after switching them. If they are connected okay, then further power testing will need to be done. If you want to have this looked at by an expert mechanic, a technician from YourMechanic can come to your car’s location to inspect the firing issues and perform the needed repairs.

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. It's on running on 4 cylinders and it has all new coils and plugs

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: Heated seat on driver side will not heat. Passenger side works fine. 02 Expedition

Hi Claire. Thanks for contacting us today. Yeah, it's likely that you have a blown fuse or electrical relay that is causing the driver side seat heat and cigarette lighter to malfunction. I do not believe they have the same...

Q: Shuts down when idling

Hello There, What you have described sounds like you may have a dirty or faulty idle air control valve. The idle air control valve is a small valve on the engine's intake system that reads the air intake as it...

Q: Check Engine Light is on with the P0451 code

Hi there: Unplugging the fuel tank pressure system would unleash an entirely different set of problems - mainly the truck wouldn't start. This error code typically indicates that the EVAP vent solenoid is damaged or faulty, which creates excess pressure...

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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...