P0300 AND P0301 CODES - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

JCO2185 · 02-29-2012, 07:46 PM

Heres the run down. 2010 V6..... Prior to installing BBK Longtubes and hi-flow cats, the car had no issues, no check engine light....after installing the headers, the CEL came on, which I assumed was from the o2 sensors....Installed trifecta tune, but now I have a P0300 (engine misfire) and P0301 cylinder 1 misfire code

When I clear the codes, the light goes away. I can drive the car around all day, the light stays off. But as soon as I let the car cool down and sit for a while, the next time it cold starts the light comes on. I have heard of people having this issue on the V6 engines and that the dealer can reflash the ECM....but wont that take off the trifecta tune? I feel like it can only be one or the other (reflash the computer to get rid of the misfire code, but then the CEL will be on for the o2 sensors)

HELP!!!

JANNETTYRACING · 03-01-2012, 02:46 PM

Quote:

Originally Posted by JCO2185

Heres the run down. 2010 V6..... Prior to installing BBK Longtubes and hi-flow cats, the car had no issues, no check engine light....after installing the headers, the CEL came on, which I assumed was from the o2 sensors....Installed trifecta tune, but now I have a P0300 (engine misfire) and P0301 cylinder 1 misfire code

When I clear the codes, the light goes away. I can drive the car around all day, the light stays off. But as soon as I let the car cool down and sit for a while, the next time it cold starts the light comes on. I have heard of people having this issue on the V6 engines and that the dealer can reflash the ECM....but wont that take off the trifecta tune? I feel like it can only be one or the other (reflash the computer to get rid of the misfire code, but then the CEL will be on for the o2 sensors)

HELP!!!

The answer to your Question is in the Codes.

You have a Problem with your Number 1 Plug or connections.

JCO2185 · 03-01-2012, 02:58 PM

checked the plug, it looked good...switch the plug from cylinder 1 to cylinder 3 and still got the cylinder 1 misfire. All connections looked good, thinking it could be a possible injector issue.....

I do notice when the car sits and i do a cold start, it feels like the car is missing when the idle is way up, and then once the idle goes down to normal it feels fine...but thats when the light comes on

Dexgto · 03-06-2012, 08:10 AM

Change out the #1 plug you broke it

Aries240SS · 03-06-2012, 09:45 AM

if it is coming on after the car heat cycles, then you should be looking at the connections for #1. Start at the coil pack and work your way down to the plug. Since you moved the plug and the misfire stayed in #1 you definitely have an electrical issue with that cylinder. Most likely at the coil pack.

The problem with these issues is that they can look good, but not be. Unplug and reconnect all the connections for the problem cylinder as you go.

JCO2185 · 03-06-2012, 10:35 AM

Could it be a bad injector also?

Aries240SS · 03-06-2012, 12:19 PM

possible, but highly unlikely. You can test that the same way. Swap the injector to #3 and see if it follows.

carbon8 · 03-10-2012, 04:06 PM

whats the word on this. Did you get it fixed.

JCO2185 · 03-10-2012, 06:57 PM

we are going to be tearing into it tomorrow, was able to get a new injector so we will see if that helps also...will keep you posted

JCO2185 · 03-12-2012, 11:53 PM

put in a new injector over the weekend and so far so good. No check engline light after cold start, no rough idling, car feels like it runs smoother. Its only been a day, so ill give it a few more days before i am fully convinced the problem is gone

carbon8 · 03-13-2012, 12:29 PM

Cool

Fastest camaro in OKC

03-06-2012, 09:45 AM	#5
Aries240SS Drives: 2011 1SS RS Camaro, 1995 LSX 240SX Join Date: Mar 2011 Location: Austin, TX Posts: 291	if it is coming on after the car heat cycles, then you should be looking at the connections for #1. Start at the coil pack and work your way down to the plug. Since you moved the plug and the misfire stayed in #1 you definitely have an electrical issue with that cylinder. Most likely at the coil pack. The problem with these issues is that they can look good, but not be. Unplug and reconnect all the connections for the problem cylinder as you go. __________________ 2011 Camaro 1SS/RS Hotchkis Chassis Brace, Rotofab Intake, Hurst Short Shifter, BMR Springs / Trailing Arms / Sways, Nitrous Outlet 150 Shot, SubThump Stealth Box, TSP 1 7/8 Headers, VMax TB, JRE Scoop, Rotofab Washer Relocation, JRE Tune

03-06-2012, 10:35 AM	#6
JCO2185 John Drives: 2010 2LT/RS Summit White Join Date: Dec 2009 Location: Long Island, NY Posts: 638	Could it be a bad injector also? __________________

03-06-2012, 12:19 PM	#7
Aries240SS Drives: 2011 1SS RS Camaro, 1995 LSX 240SX Join Date: Mar 2011 Location: Austin, TX Posts: 291	possible, but highly unlikely. You can test that the same way. Swap the injector to #3 and see if it follows. __________________ 2011 Camaro 1SS/RS Hotchkis Chassis Brace, Rotofab Intake, Hurst Short Shifter, BMR Springs / Trailing Arms / Sways, Nitrous Outlet 150 Shot, SubThump Stealth Box, TSP 1 7/8 Headers, VMax TB, JRE Scoop, Rotofab Washer Relocation, JRE Tune

03-10-2012, 06:57 PM	#9
JCO2185 John Drives: 2010 2LT/RS Summit White Join Date: Dec 2009 Location: Long Island, NY Posts: 638	we are going to be tearing into it tomorrow, was able to get a new injector so we will see if that helps also...will keep you posted __________________

03-12-2012, 11:53 PM	#10
JCO2185 John Drives: 2010 2LT/RS Summit White Join Date: Dec 2009 Location: Long Island, NY Posts: 638	put in a new injector over the weekend and so far so good. No check engline light after cold start, no rough idling, car feels like it runs smoother. Its only been a day, so ill give it a few more days before i am fully convinced the problem is gone __________________

02-29-2012, 07:46 PM	#1
JCO2185 John Drives: 2010 2LT/RS Summit White Join Date: Dec 2009 Location: Long Island, NY Posts: 638	P0300 AND P0301 CODES Heres the run down. 2010 V6..... Prior to installing BBK Longtubes and hi-flow cats, the car had no issues, no check engine light....after installing the headers, the CEL came on, which I assumed was from the o2 sensors....Installed trifecta tune, but now I have a P0300 (engine misfire) and P0301 cylinder 1 misfire code When I clear the codes, the light goes away. I can drive the car around all day, the light stays off. But as soon as I let the car cool down and sit for a while, the next time it cold starts the light comes on. I have heard of people having this issue on the V6 engines and that the dealer can reflash the ECM....but wont that take off the trifecta tune? I feel like it can only be one or the other (reflash the computer to get rid of the misfire code, but then the CEL will be on for the o2 sensors) HELP!!! __________________

03-01-2012, 02:58 PM	#3
JCO2185 John Drives: 2010 2LT/RS Summit White Join Date: Dec 2009 Location: Long Island, NY Posts: 638	checked the plug, it looked good...switch the plug from cylinder 1 to cylinder 3 and still got the cylinder 1 misfire. All connections looked good, thinking it could be a possible injector issue..... I do notice when the car sits and i do a cold start, it feels like the car is missing when the idle is way up, and then once the idle goes down to normal it feels fine...but thats when the light comes on __________________

03-06-2012, 08:10 AM	#4
Dexgto Drives: 2009 Pontiac G8 Join Date: Feb 2011 Location: Charleston SC Posts: 82	Change out the #1 plug you broke it

03-10-2012, 04:06 PM	#8
carbon8 Drives: 2010 Camaro SS,2008 Hayabusa Join Date: Jun 2010 Location: Yukon,Oklahoma Posts: 627	whats the word on this. Did you get it fixed.

03-13-2012, 12:29 PM	#11
carbon8 Drives: 2010 Camaro SS,2008 Hayabusa Join Date: Jun 2010 Location: Yukon,Oklahoma Posts: 627	Cool Fastest camaro in OKC

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