Exception in rendering!

Message: window is not defined

ReferenceError: window is not defined
    at new c (/tmp/execjs20161208-55793-1yq9ahojs:136:3912)
    at m.mountComponent (/tmp/execjs20161208-55793-1yq9ahojs:47:15602)
    at /tmp/execjs20161208-55793-1yq9ahojs:49:31860
    at a.r.perform (/tmp/execjs20161208-55793-1yq9ahojs:47:12503)
    at Object.a [as renderToString] (/tmp/execjs20161208-55793-1yq9ahojs:49:31821)
    at r (/tmp/execjs20161208-55793-1yq9ahojs:50:21164)
    at Object.S.ReactOnRails.serverRenderReactComponent (/tmp/execjs20161208-55793-1yq9ahojs:32:6073)
    at eval (eval at <anonymous> (/tmp/execjs20161208-55793-1yq9ahojs:173:8), <anonymous>:10:23)
    at eval (eval at <anonymous> (/tmp/execjs20161208-55793-1yq9ahojs:173:8), <anonymous>:17:3)
    at /tmp/execjs20161208-55793-1yq9ahojs:173:8

Q: Po 301

asked by on

Hesitation rough idle missing hard start when warm mis gets worse code po301 keeps coming up already replaced plugs wires cap rotor injectors egr gasket compression 150 no leak down

My car has 120365 miles.
My car has an automatic transmission.

A: P0301 is a misfire in number one cylinder. ...

P0301 is a misfire in number one cylinder. I believe you are already aware of this. A common problem on these is the injector assembly. I would do everything below before I condemn it. If I were there in person, I could tell the difference between a cylinder problem and an injector problem.

You need to perform a leak down inspection. It is not necessary to use the percentage type that tells you how much air is leaking out of the cylinder. You just need about 50 psi of air pressure and a hose that will thread into the spark plug hole. With air pressure in the cylinder, listen from the tail pipe, open the throttle and listen there and listen in the crank case with the oil filler cap removed. If you hear a hissing in one of these areas, you have a problem in either the exhaust valve (tail pipe), intake valve (intake), or the rings (crank case).

You can have good compression even with one of these having a problem. A dynamic compression test will build pressure and small amounts of oil will seal small problems, but this changes when the fuel is ignited and the pressure sky rockets.

Keep in mind, you could also have a head gasket failure. Does the coolant keep getting low? Do the spark plugs have a tinge that matches the color of the coolant? Is the cylinder wet from coolant? A good way to test for this is to warm the motor thoroughly and pressure test the cooling system. A cooling system pressure tester will pressurize the cooling system in the same fashion as what occurs when your motor warms up. Once you have pressure in the cooling system, let it sit for at least five minutes. Sometimes longer. I have let it sit for as much as a day of work, depending on the suspected failure. If you have a head gasket issue in number one cylinder, this will push coolant into the cylinder. You should be able to spray air into it and get some wet coolant blowing around. Do what ever you need to see if there is any coolant in the the cylinder.

If you should require more assistance, I recommend getting an engine is misfiring inspection.

Good luck!

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

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: 2002 blazer 4x4 zr2 abs brake light stays on.

You would need to have the system scanned to see what the feedback the ABS light is giving. From there, you would need to turn off the light after the system is reset to see if it comes back. You...

Q: Car kills out within 30 secs or so after starting.

There are many things that can cause the motor to stall, but generally if the motor will run at all, this suggests that spark is not an issue and that it is most likely related to fuel delivery. Fuel delivery...

Q: Clicking noise when I crank my car after a cold start. It goes away after the car idles down and warms up

Hello. There are 2 possibilities for this clicking sound. First, you may need to have the valves adjusted. They may be a tad loose with your mileage. The recommended interval for a valve adjustment for this engine is every 105K...

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...
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...