What causes the lifter on a GMC misfire to fail?
Mainly the 5.3L engines with AFM (active fuel management). The AFM lifters tend to fail, and stick or collapse. Keeping good oil, and plenty of it in the engine, is KEY. These engines also have a bad oil consumption issue, which GM say is “in their specs”.
Are there any issues with the GMC 5.3L V8?
GM has very common issues with their V8 engines. Mainly the 5.3L engines with AFM (active fuel management). The AFM lifters tend to fail, and stick or collapse. Keeping good oil, and plenty of it in the engine, is KEY. These engines also have a bad oil consumption issue, which GM say is “in their specs”.
What makes a GMC Canyon check engine light illuminate?
The engine may develop a misfire due to worn valve seats. This fault will cause the Check Engine Light to illuminate. Replacement of the cylinder head may be required to correct this concern. The average cost for a GMC Canyon Check Engine Light Diagnosis & Testing is between $88 -$111.
How much does a GMC Canyon engine cost?
My 2005 GMC Canyon is idling very rough and feels like it’s going to die at lower rpm, I took it to the dealership and was told the number two cylinder head is firing at very low compression. They quoted me $3500 to repair. The engine only has 58,000 miles on it, shouldn’t the vehicle run a little longer than this?
What makes a GM 4.8l engine misfire?
Now that we’re aware of the core essentials that each engine cylinder needs to run at a 100% power output.. in the next sections I’ll explore some of the specific components that fail and cause a misfire and misfire codes.
How to troubleshoot a GM 4.8L 5.3L?
You can find this tutorial in Spanish here: Cómo Diagnosticar y Resolver Una Falla en Cilindro (GM 4.8L, 5.3L, 6.0L) (at: autotecnico-online.com ). The core symptom of a misfire is rough idle. This isn’t the only symptom that your GM van, pickup or SUV might experience… here are some more that you might see:
Can a lack of Spark cause a misfire?
because the cool thing is that no matter if you have misfire codes or No Codes at all, the core cause of the misfire is a lack of spark, or fuel or air (think engine mechanical problem such as: vacuum leaks, low compression, etc).
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!