Skip the auto shop - Our mechanics make house calls

Q: No spark on cylinder 1 and 4

asked by on

I've been working on my car the past week, and it’s not sparking on cylinder one and cylinder four. So I changed the coil, camshaft sensor and crankshaft sensor. But now I'm not getting any error codes, and it's still not sparkling on those cylinders. Do you think the Powertrain Control Module is shot? Do you have any ideas?

A: Before considering the replacement of the P...

Before considering the replacement of the PCM, return the coil pack to the parts store and ask for it to be tested. It is not uncommon to receive a faulted new part. Spark has to travel from the coil, through a wire and to a spark plug for each cylinder so each it is possible that there can be issues at any one of these components when you are considering spark problems. I recommend that you have another certified professional, like one from YourMechanic, come to your home or office to diagnose the ignition system and pinpoint the faulty components before proceeding with repair.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: Car got hot now turns over but act like no compression an blows starter relay

Hello there, this sounds like there may be a few different issues going on. The starter relay or fuse will only blow if the starter is drawing too much power, or if there is a short to power. Likely causes...

Q: My oil pressure sending unit is faulty. What is the cost to replace it?

The cost of replacing your oil pressure sensor will depend on what year and model your Ford is and sometimes the engine type as well. But you should know that oil pressure can be low even with plenty of oil...

Q: I have to have my foot on the gas to start my car.

There are a lot of reasons a computer controlled car won't stay running unless you have your foot on the gas. Anything from low oil pressure to a weak fuel pump could be the cause. Your particular vehicle, however, is...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
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...