How to diagnose random cylinder misfires in Chevrolet?
How to diagnose random cylinder misfires in Chevrolet?
After I got the check engine light, I started doing some more diagnosis with a bluetooth-OBDII reader which is when I found that I had misfires only on cylinders 2, 5, 6, and 8. Since it was on separate banks, I could find no commonality of items to replace, so I tried the following things. replaced the EGR valve, also with no effect.
What kind of misfire does a Chevy P0300 have?
I read it and it was a P0300 Random/Multiple Misfire. I had experienced a slightly rough idle previously (nothing serious) and had been unable to track it down. I replaced the PCV valve as a course of standard maintenance and it seemed to help get the idle back down, but still slightly rough.
How much does a random cylinder misfire cost?
Mine is 243,000, but a new one fixed it. The OEM are plastic and the shaft starts to wobble as they wear and age and produce misfires.. Got a new one made from aluminum with cap and sensor for $34 on eBay, works great.
What to do if your car cylinder is misfiring?
The easiest way to check if this is the case is to take the vehicle into a shop and get a compression test on the cylinder that’s misfiring. If the cylinder reads 5% or lower than the others, there’s a compression problem.
What’s the diagnostic trouble code for a misfire?
The hard-to-diagnose misfires are usually the ones that set a P0300 Random Misfire Code or ones that don’t set a diagnostic trouble code at all. I don’t mean to give you the idea that it’s all a hopeless matter!
What should I do if my cylinder is misfiring?
Check it in a while. At first, remove the spark plug in your dead cylinder. Then, plop the sock from the compression tester into the spark plug gap. After that, open the ignition source as the motor can’t really fire at the time of performing this test.
The hard-to-diagnose misfires are usually the ones that set a P0300 Random Misfire Code or ones that don’t set a diagnostic trouble code at all. I don’t mean to give you the idea that it’s all a hopeless matter!
How to troubleshoot a GM Truck misfire?
This isn’t the only symptom that your GM van, pickup or SUV might experience… here are some more that you might see: P0300: Random Cylinder Misfire. P0301: Cylinder #1 Misfire. P0302: Cylinder #2 Misfire. P0303: Cylinder #3 Misfire. P0304: Cylinder #4 Misfire. P0305: Cylinder #5 Misfire. P0306: Cylinder #6 Misfire. P0307: Cylinder #7 Misfire.
Check it in a while. At first, remove the spark plug in your dead cylinder. Then, plop the sock from the compression tester into the spark plug gap. After that, open the ignition source as the motor can’t really fire at the time of performing this test.
What happens when you have a misfire on your engine?
Occasional misfires may pass unnoticed, but a steady misfire is hard to miss. The engine usually feels rough, lacks power and uses more gas than usual. Sometimes a misfire may feel like a vibration. A misfire also will cause a huge increase in hydrocarbon (HC) emissions, which can cause a vehicle to fail an emissions test.
