Camaro Not running right
11-29-2018, 10:18 PM
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Camaro Not running right I am wondering where my problem may be on my 2010 V6 Camaro. I have changed everything under the sun to prevent the misfires but the high pressure fuel pump, timing change, and fuel injectors. The codes that are thrown are Random multiple misfires, Misfires on cylinders 2,4, and 6, and low fuel pressure. I have put a new fuel pump on it, but the car is still reading that the pressure is low. Is the pressure regulated by the PCM or the high pressure pump? Thanks in advance for your help.
11-29-2018, 10:23 PM
#2
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As far as the misfires, check all your grounds on that side (2,4,6) of the engine.
12-04-2018, 01:26 PM
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12-04-2018, 01:29 PM
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12-04-2018, 02:00 PM
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Oil
Spark Plugs (twice)
Ignition Coils
Intake Camshaft sensors
Crankshaft Sensor
Both Fuel Pressure Sensors
Vent Valve Solenoid by the tank
Solenoid Purge Valve under the hood
Fuel Cap
Low Pressure Fuel Pump in the tank
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12-04-2018, 06:57 PM
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Fuel trim is how much fuel the pcm is adding or subtracting from engine. The o2 sensors is what controls this. So if the engine/tune is set to produce an air fuel ratio 13.5 and the sensor is reading 14.0 it starts adding fuel until it is correct or visversa if it’s set to be 13.5 and it’s reading 13 it start pulling fuel out of the tine until it’s corrected. If one or both sensors aren’t working as they should it can cause some majors drivability issues and potentially damage to the engine if left un-corrected
12-05-2018, 08:03 PM
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Fuel trim is how much fuel the pcm is adding or subtracting from engine. The o2 sensors is what controls this. So if the engine/tune is set to produce an air fuel ratio 13.5 and the sensor is reading 14.0 it starts adding fuel until it is correct or visversa if it’s set to be 13.5 and it’s reading 13 it start pulling fuel out of the tine until it’s corrected. If one or both sensors aren’t working as they should it can cause some majors drivability issues and potentially damage to the engine if left un-corrected
12-05-2018, 08:07 PM
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Ok. Thanks. When I took the fuel rails off to check them, I put everything back on and the entire bank is still showing misfires. I am going to look into the O2 sensor next. Thanks for the information.
12-05-2018, 08:43 PM
#12
5 Jeeez and they won’t even tell you what’s wrong with it? Holy crap!
Since it’s a V6 you can swap the O2 sensors left to right and see if the misfires follow the sensor to the 1/3/5 bank. No need to throw anymore parts at it unless you prove the sensor needs to be replaced.
Since it’s a V6 you can swap the O2 sensors left to right and see if the misfires follow the sensor to the 1/3/5 bank. No need to throw anymore parts at it unless you prove the sensor needs to be replaced.
