Q: Misfire P0304 and shaking

asked by on

Cold engine everything OK. Warm start shaking on idle. Shaking is increasing and becoming ok. injector been cleaned ultrasoud . Changed plugs, vt leads, coil. Can't see so far drop of power

My car has 70000 miles.
My car has a manual transmission.

Hi there. From the description you have provided, your vehicle’s P0304 misfire needs to be properly diagnosed since replacing components is not working. It could be low compression in that cylinder. This could account for not feeling the miss cold.

Increased RPM can overcome slightly low compression. A compression test should be performed, to rule out a mechanical failure. It could also be a faulty fuel injector electrically failing with increased temperature.

Resistance increases with an increase in temperature. It could be a poor electrical connection again, showing up with increased temperature. Circuit tests should be performed. I recommend having you vehicle’s Check Engine Light diagnosed and repaired by a certified technician, such as one from YourMechanic.

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. Misfire P0304 and shaking

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: My passenger door won't open from inside or the outside on my 1997 Ford Explorer

Hi there. This commonly happens when the door latch assembly breaks. I have seen this often and it takes quite a bit of work to get it open. The door panel needs to be completely removed. in a lot of...

Q: Grinding noise of the engine with P0340 code

Code P0340 is a camshaft sensor fault. The cam sensor is responsible not only for determining cam position, but it also is used by the engine computer for cylinder identification to set up both ignition firing sequence and sequential injection...

Q: Car misfires while idling

If you think your car is misfiring, you should have a Check Engine light up on the dash. If you have a Check Engine light, start by having the vehicle scanned for trouble codes. If any cylinder is misfiring, the...

Related articles

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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.