Blinking CEL? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

2L82RUN · 05-31-2012, 05:13 PM

I've recently noticed I'm getting a blinking CEL at times while driving. It's not setting a code of any type and doesn't seem to affect performance at all. Does anyone have any idea what is going on? I'm running 8-9psi with a boost cam. Any ideas welcomed

camslambam · 05-31-2012, 05:22 PM

Hmmm.....

So you have a CEL but no codes are showing up on your scanner/sct/whatever you use?

Might be the light malfunctioning...?

xx_ED_xx · 05-31-2012, 05:22 PM

code reader would be a smart investment

camslambam · 05-31-2012, 05:23 PM

Quote:

Originally Posted by xx_ED_xx

code reader would be a smart investment

By saying it's not throwing codes I'd assume he means nothing is appearing on his scanner.

If he doesn't have a scanner...

lol

2L82RUN · 05-31-2012, 05:27 PM

Yep. Have a scanner. No codes setting. CEL will blink for up to 30 secs or so and then go away. Hasn't stayed on to this point. Owners manual mentions a blinking CEL and refers to a misfire. If that's the case it may be the cam but I never noticed it blinking until the past week or so

10aSSee D · 05-31-2012, 05:35 PM

I had a cel come on for a while then go off. When it was on I read the code and it was the o2 sensor. Then it would go away and come back on for a day or two and disappear. As of right now no cel....

xx_ED_xx · 05-31-2012, 05:37 PM

If the CEL is flashing there is a code PERIOD. Get a scanner that can read it

camslambam · 05-31-2012, 05:42 PM

What rpm do you idle at?

Does RPM drop sharply after you stop accelerating?

jay@redline-motorsports · 05-31-2012, 05:49 PM

flashing cel is a p0300 random misfire

MA2010SS · 05-31-2012, 05:49 PM

Check your plugs, I worked on a silverado with a 5.3 had a small cam and a couple of other minor supporting mods with an occasional flashing cel without and codes, found 3 fouled plugs...just a thought, same engine family with similar problem as you are describing

2L82RUN · 05-31-2012, 05:52 PM

Quote:

Originally Posted by jay@redline-motorsports

flashing cel is a p0300 random misfire

Thanks. That's what I was looking for. I was setting p0300 after cam install on occasion. Tuner advised it was due to the cam lope and computer throwing the code thinking it was a misfire. He tuned the code out so that's probably why I'm seeing it blink now without setting the code

jay@redline-motorsports · 05-31-2012, 06:07 PM

there is a table in the ecm that is time between crankshaft targets vs rpm if the car takes to long between events it thinks there's a misfire. when the car lopes because of the cam it takes too long between targets and sees a misfire and since there's no rhyme or reason to the lope vs cyl # it thinks its random, not isolated to a cylinder. if the code is deleted then you loose that diag capability completely, rather those thresholds need to be raised in the idle region and left alone elsewhere so the code can still function.

ducted · 05-31-2012, 06:44 PM

I had the same error and was a ignition cable not properly connected to a spark plug.

Miguelito · 04-15-2013, 11:20 AM

Quote:

Originally Posted by 2L82RUN

Thanks. That's what I was looking for. I was setting p0300 after cam install on occasion. Tuner advised it was due to the cam lope and computer throwing the code thinking it was a misfire. He tuned the code out so that's probably why I'm seeing it blink now without setting the code

I also have the same issues after installing cam... blinking CEL and after 30 seconds its gone.

What was your solution ? Did you change anything ?

05-31-2012, 05:13 PM	#1
2L82RUN Drives: ABM SS/RS Join Date: Sep 2009 Location: WV Posts: 587	Blinking CEL? I've recently noticed I'm getting a blinking CEL at times while driving. It's not setting a code of any type and doesn't seem to affect performance at all. Does anyone have any idea what is going on? I'm running 8-9psi with a boost cam. Any ideas welcomed

05-31-2012, 05:22 PM	#3
xx_ED_xx Drives: 04 Silverado Join Date: Jun 2010 Location: Floriduh! Posts: 1,113	code reader would be a smart investment __________________

05-31-2012, 05:35 PM	#6
10aSSee D Drives: Silver 2010 SS Camaro Join Date: Jul 2009 Location: TN Posts: 2,562	I had a cel come on for a while then go off. When it was on I read the code and it was the o2 sensor. Then it would go away and come back on for a day or two and disappear. As of right now no cel.... __________________ MODS: ADM built 417, 2.9L Whipple with 3.250 pulley, ADM ported and polished LSA heads,ADM stage3 cam,ADM LSA belt drive system,ADM CAI race scoop, ADM dual fuel pumps, ID 850's, BMR full suspension, Gforce 9 inch kit with 3.5 inch driveshaft, Street Slayer twin carbon clutch, Lingenfelter oil seperator. Tuned by built by ADM Performance, 763rwhp,705rwtq

05-31-2012, 05:37 PM	#7
xx_ED_xx Drives: 04 Silverado Join Date: Jun 2010 Location: Floriduh! Posts: 1,113	If the CEL is flashing there is a code PERIOD. Get a scanner that can read it __________________

05-31-2012, 05:49 PM	#10
MA2010SS Drives: 2010 Camaro SS Join Date: Aug 2010 Location: Somerset MA Posts: 725 View My Garage	Check your plugs, I worked on a silverado with a 5.3 had a small cam and a couple of other minor supporting mods with an occasional flashing cel without and codes, found 3 fouled plugs...just a thought, same engine family with similar problem as you are describing __________________ 2010 Camaro SS Whipple SC, CAI Inc Intake, TSP 1 7/8" LT headers no cats, 3" magnaflow exhaust, HPT, RX Catch Can, LSR Toe Rods, LSR Trailing Arms, ALKY Control Meth, McLeod RXT Twin Disc, ZL1 fuel pump, 3.73 ZL1 Differential Kit, BTR PDS Stage 2 Cam, Tuned by SLOWHAWK Performance Bridgewater MA

05-31-2012, 05:22 PM	#2
camslambam Account Suspended Drives: 2010 SS, 06 SRT10 Ram Join Date: Nov 2011 Location: C. America Posts: 1,658	Hmmm..... So you have a CEL but no codes are showing up on your scanner/sct/whatever you use? Might be the light malfunctioning...?

05-31-2012, 05:27 PM	#5
2L82RUN Drives: ABM SS/RS Join Date: Sep 2009 Location: WV Posts: 587	Yep. Have a scanner. No codes setting. CEL will blink for up to 30 secs or so and then go away. Hasn't stayed on to this point. Owners manual mentions a blinking CEL and refers to a misfire. If that's the case it may be the cam but I never noticed it blinking until the past week or so

05-31-2012, 05:42 PM	#8
camslambam Account Suspended Drives: 2010 SS, 06 SRT10 Ram Join Date: Nov 2011 Location: C. America Posts: 1,658	What rpm do you idle at? Does RPM drop sharply after you stop accelerating?

05-31-2012, 05:49 PM	#9
jay@redline-motorsports Account Suspended Drives: 930 Join Date: Apr 2012 Location: fl Posts: 85	flashing cel is a p0300 random misfire

05-31-2012, 06:07 PM	#12
jay@redline-motorsports Account Suspended Drives: 930 Join Date: Apr 2012 Location: fl Posts: 85	there is a table in the ecm that is time between crankshaft targets vs rpm if the car takes to long between events it thinks there's a misfire. when the car lopes because of the cam it takes too long between targets and sees a misfire and since there's no rhyme or reason to the lope vs cyl # it thinks its random, not isolated to a cylinder. if the code is deleted then you loose that diag capability completely, rather those thresholds need to be raised in the idle region and left alone elsewhere so the code can still function.

05-31-2012, 06:44 PM	#13
ducted Drives: 2010 Camaro 2SS/RS/LS3 Join Date: Apr 2010 Location: Spain Posts: 20	I had the same error and was a ignition cable not properly connected to a spark plug.