Random misfire p0300 and loss of power
#1
Random misfire and loss of power
Hello guys over been having issues with my car. Check engine light came up it's a random misfire. Also I'm experiencing loss of power I replaced the sparkplugs and the old ones seem to be fine the coils look good. I do have valve cover leakege idk if it is related. My car has 83k miles.
#2
Random misfire p0300 and loss of power
Hey guys I have a random misfire code and I have a huge loss of power and leak from valve cover (maybe related?) Recently changed sparkplugs cleaned throttle body and mass airflow sensor, the coils seem ok.if I accelerate slowly is not too noticeable but once I hit it hard the car takes a while to respond. When I shift gears around 5000 rpm I lose around 1000 to 2000 rpm. Can anyone help? I'm taking it to a shop tomorrow for a diagnosis but I'm open to suggestions tank you gentlemen.
#4
#6
For those trying to help, a P0300 is a "random misfire" and that mean a specific cylinder is not identified.
So.... moving a fuel injector or ignition coil won't help, as you won't know if the misfire has moved.
I would check the fuel pressure. A special adapter is required (https://cj-motorsports.com/products/fuel-tap-npt-2-bolt) and a 100 PSI gauge.
Stock fuel pressure at idle should be around 51 psi.
Another option is to use OBD Fusion's diagnostic report and look at the misfire counters.
Sometime a P0300 is reported, but the misfire counter may be higher on a specific cylinder.
So.... moving a fuel injector or ignition coil won't help, as you won't know if the misfire has moved.
I would check the fuel pressure. A special adapter is required (https://cj-motorsports.com/products/fuel-tap-npt-2-bolt) and a 100 PSI gauge.
Stock fuel pressure at idle should be around 51 psi.
Another option is to use OBD Fusion's diagnostic report and look at the misfire counters.
Sometime a P0300 is reported, but the misfire counter may be higher on a specific cylinder.
#7
For those trying to help, a P0300 is a "random misfire" and that mean a specific cylinder is not identified.
So.... moving a fuel injector or ignition coil won't help, as you won't know if the misfire has moved.
I would check the fuel pressure. A special adapter is required (https://cj-motorsports.com/products/fuel-tap-npt-2-bolt) and a 100 PSI gauge.
Stock fuel pressure at idle should be around 51 psi.
Another option is to use OBD Fusion's diagnostic report and look at the misfire counters.
Sometime a P0300 is reported, but the misfire counter may be higher on a specific cylinder.
So.... moving a fuel injector or ignition coil won't help, as you won't know if the misfire has moved.
I would check the fuel pressure. A special adapter is required (https://cj-motorsports.com/products/fuel-tap-npt-2-bolt) and a 100 PSI gauge.
Stock fuel pressure at idle should be around 51 psi.
Another option is to use OBD Fusion's diagnostic report and look at the misfire counters.
Sometime a P0300 is reported, but the misfire counter may be higher on a specific cylinder.
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bgoodman
Engine, Drivetrain & Forced-Induction
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10-26-2019 11:46 AM