Skip the auto shop - Our mechanics make house calls

Q: Getting to cylinder #3 to replace ignition coil?

asked by on

I have diagnosed my 2002 infiniti q45 and received the code p0303 with a basic transmission code. Witch I found to be a backfire in cylinder #3, Suggesting to replace the ignition coil. I have located all 8 ignition coils and found that they look a little challenging to get to especially #3. So I'm wondering the best way to get to it. Any info, blueprint, diagram, advice would be extremely helpful? Thanks!

My car has 11500 miles.
My car has an automatic transmission.

A: I could go into a long drawn out direction ...

I could go into a long drawn out direction to remove the coils on the engine but if you go on google and put in "2002 Infiniti q45 #3 coil removal" in the search bar you will see many good articles and videos showing the removal and replacement of the coils and spark plugs for your car.

Yes, you should change all of the spark plugs when you put in the new coils. Make sure you do all of this when the engine is absolutely cold. This should help you in removing the coils and plugs, and installing the new set of spark plugs free from damage to the threads in the heads. If you need assistance with getting this done, reach out to a certified mechanic who can replace your spark plugs and coils at your convenience.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: VTEC not activating

The VTEC on your vehicle can be affected by using the incorrect oil viscosity or the VTEC solenoid may be defective. This can be determined by scanning for codes and conducting a diagnostic check to see if the solenoid is...

Q: Engine steam and antifreeze leak - 1976 Mercedes Benz 450SL

Hello. This sounds like the water pump, radiator, radiator hoses, or even one of the heater hoses, have started to leak. It is also possible that the gasket to the thermostat could have a leak as well. It doesn’t sound...

Q: Car has rough idling, occasionally seems it would stall

Hello. Replacing the fuel injectors will not cause this. If it only stalls at idle, I would clean the throttle body first. If it is dirty, then this will occur. If it is fine, then it may be an air...

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...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.