I had experienced a slightly rough idle previously nothing serious and had been unable to track it down. Te local dealer tech first checked the ignition, even swapped the spark plugs, which did not help. By feel it now feels to me like the 4 cylinder is the misfire. Remember to refer to an appropriate manual for specific instruction. That is not the case. The P0300 trouble code indicates that there is a misfire in random or multiple cylinders.
A misfire is nothing more than a lack of combustion, which can be caused by poor fuel quality or metering, low compression, lack of spark or unmetered air entering the engine. Though they are dimensionally bigger thicker than the steel counterpart, they weight a lot less, last longer, and offer better damping properties than steel. Would you like to answer one of these instead? A misfire condition, in non technical terms simply describes an engine that is not running on all cylinders. If the spark plug gap is not precise, this will cause a misfire. Try the easy things first. Truck has 5k miles on it.
Normally it would not work, because the tire gauge doesn't reach far enough down into the shrader valve to push the valve open, but all you have to do is drop a small pebble into the tip of the valve before using the gauge. I also replaced the spark plugs and plug wires, and replaced the alternator on warranty for an unrelated issue. Plug coil pack back in, move to the next. P0300 Diagnostic Code - Random Misfire Symptoms. I also have a plug that keeps fouling on the 4 cylinder. P0300 Diagnostic Code - Random Misfire Symptoms. Does anyone else have any suggestions before I take it to the dealer, it is not under warrenty and has a 138,000 miles on it.
There are plenty of ground straps, so search your engine bay over and see what's going on. Moral of my story is you may as well perform the compression test and hope it's not it before going after the sensors, injectors etc. Have you been able to determine what is fouling 4 plug oil, water, fuel. . You didn't install it on engine.
If you say that you plugged it in as a test, and it didn't help - they wont allow the return. I need advice bad before I set fire to it lol. And even a very good experienced tech could not determine at a glance whether the problem was ignition or fuel system related without proper test procedure. I'm thinking about doing a compression test. Plus I lost 5 hours of my life waiting for the shop to do what they do. Also sort of suspected a possible voltage diode type problem say within the alternator as the headlights seem to slightly flicker during the issue of the code popping up after clearing. Let us know, good luck.
Some people have mentioned a vacuum line off the fuel pressure regulator. Okay i've got a 6L in my 04 esky, Last week we had a really cold day and while warming it up the check engine light cam on. I paid money for nothing. I'd like to test fuel pressure, but don't have a tester. I know a stealership could scan these for you, but don't get caught up in the R-n-R game Remove and Replace --- it gets expensive fast. .
. If 4 is fouling and causing a misfire, you may have a P0304, or P0300. Find compression low on one cylinder so pulled heads had them reworked. Now it runs like crap misfiring away every time I start it. It has a good fuel pressure, it has no air leak, and also when you rev the truck it doesnt do the misfire, it runs good, and does the misfire only on low idle.
. . Plugs plug wires rotor button and distibutor cap have been replaced. See our article , if you need more assistance with this. Chevy Silverado P0300 Definition P0300 is a general and random misfire code, which means that the code is not going to tell you which cylinder is causing the misfire. The logic is simple enough,the airflow at idle is much slower than under a load and the combustion process is more affected by turbulence or disturbance to this flow. The fuel then releases energy that powers the crankshaft, which must continuously turn smoothly as the car is moving.
It gives you the same knowledge is the coil working? If you got a P302 or something similar with the P0300, it may be a good idea to check and see if there is any damage or failure from your ignition components. Great conversation and happy to walk you through your car issues. To gap the spark plugs properly, it will be necessary to use a feeler gauge. Yea last night I swapped the 2 injector with the 4 injector. Cleaned throttle body, and all intake plenum related components.