Q: Q: Misfire on cylinder one

asked by on

Hello I have a check engine light on for a misfire on cylinder one I recently had the coil pack replaced for a misfire on cylinders 1 and 4 check engine light turned off for about a week then turned back on for a cylinder misfire on cylinder 1. I checked te spark plugs and wires they were fine did a spark test came out fine. Checked injector pulsation as well as ohmed the injector out. I looked for vacuum leaks came to fine none as well as made sure the engine was receiving sufficient air. I'm also recieving another code now that I've pulled up the codes again for a fuel pressure regulator sensor. Could that be the problem causing the misfire?

My car has 180000 miles.
My car has an automatic transmission.

A misfire to cylinder 1 may be a fuel pressure regulator sensor problem but it is most likely due to a clogged injector on number one. You will need to scan and view data to see if fuel pressure sensor is needing replacement first. Then have the injectors cleansed to see if the codes go away.

I’d suggest you get this looked at by a qualified technician who can perform these checks to diagnose your Check Engine Light and make the appropriate repairs to your vehicle.

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. Q: Misfire on cylinder one

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: The engine light is blinking, the car jolts when it car accelerates. And the engine songs like it wants to shut off sometimes

The flashing Check Engine Light tells me that the engine is having a misfire condition occurring. This could be due to bad spark plugs or ignition coils as well as other sensor on the engine reading incorrectly. There will be...

Q: Car computer showing several fault codes.

I would have a technician tune the car up and replace the spark plugs and coil packs. That is the code for misfire and coil pack problems. Code p01297 is a code for the map sensor. You could have a...

Q: Car was driving and made a turn and the check engine light went off and the battery light came on in a 2002 toyato avalon y

It sounds like the engine stalled but you presently have a no start condition, specifically no starter motor operation. To get the vehicle started, first check to be sure that the engine immobilizer system (security system) is not activated thus...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...