Is the Silverado Sierra GMC truck running too rich?
I have pulled up P0172 (bank 1) Running Rich and P0175 (bank 2) running rich. I have ran a misfire diagnostic with the scan tool with the engine light on and the engine misfires quite a bit, as it will if it is over fuelling. After deleting the codes, the truck seems to run fine and no misfires.
What should I do if my GMC cylinder misfire?
In Spark Ignition Direct Injection (SIDI) system applications, if a fuel injector fault DTC is set during a misfire event, the ECM will not re-enable the injector. Need more information on how to fix the P0300 GMC code?
What causes the p0172 code on a GMC Sierra?
The P0172 code on a GMC Sierra will often be thrown if the fuel injection system is not operating properly. Typically the code will be triggered by a rich condition in the engine. There aren’t usually any drivability issues associated with P0172.
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.
Why does my Silverado Sierra run too rich?
I have ran a misfire diagnostic with the scan tool with the engine light on and the engine misfires quite a bit, as it will if it is over fuelling. After deleting the codes, the truck seems to run fine and no misfires. I have changed all spark plugs, I have cleaned my mass air flow sensor and map sensor with no difference made.
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.
Why is my GM 4.8l engine running too lean?
The engine may be running too lean, due to a leaking intake manifold. Too lean means too much air and not enough fuel; according to the power control module (PCM) calculation. When the engine is cold, not all sensors function. As the engine warms up the oxygen sensors report the lean condition.
Why does my GMC Sierra keep running cold?
A technician may not inspect the coolant temperature sensor and cooling system. When the engine is cold, more fuel is added to help warm it up to a desirable temperature. If the coolant temperature sensor is not sending the proper signal there is a possibility that the engine ECU may assume that it is always running cold.