Flashing SES Light???

hitmanws6 · 05-10-2009, 10:21 PM

What could be causing this? It doesn't feel like its misfiring. When i am at a stop and let off the brake a little bit the car feels shaky. I was thinking the exhaust leak by my header would be screwing up the O2 reading. Could that be it?

bobbyd · 05-10-2009, 10:24 PM

easiest way to find out would be to scan it man.

also check your plug wires make sure they are all the way in.

hitmanws6 · 05-10-2009, 10:28 PM

already checked the plugs/wires. engine is less than a week old

loyolacub68 · 05-11-2009, 10:38 AM

If the SES light is flashing it could be a serious issue, you should get the code read very soon.

doublea87 · 05-11-2009, 08:54 PM

a flashing SES light usually means you have a misfire. you might want to check coils or a spark plug with too big of a gap causing a weak spark, nothing you might not feel but just enough to mess up your cat and o2 readings. the exhaust leak could be an aid to the cause but i wouldnt see it being the whole problem.

LS6427 · 05-11-2009, 09:05 PM

Dude, if that exhaust leak is within 12 inches of an 02 sensor, that is bad and can be causing your issues. Fix it.

BlackScreaminMachine · 05-13-2009, 06:46 AM

Miss Fire, if flashing.

NonGoggleGuy · 05-13-2009, 08:09 AM

Quote:

Originally Posted by BlackScreaminMachine

Miss Fire, if flashing.

Quote:

Originally Posted by doublea87

a flashing SES light usually means you have a misfire. you might want to check coils or a spark plug with too big of a gap causing a weak spark, nothing you might not feel but just enough to mess up your cat and o2 readings. the exhaust leak could be an aid to the cause but i wouldnt see it being the whole problem.

I'm with these guys. I believe a flashing SES light is a misfire.

But get it scanned ASAP.

TAtoad · 05-13-2009, 11:02 AM

Quote:

Originally Posted by BlackScreaminMachine

Miss Fire, if flashing.

not exactly. mine did that when i bottomed out and smashed the catalytic converter.

hitmanws6 · 05-13-2009, 01:39 PM

its a misfire in cylinder 8

crazboy99 · 05-13-2009, 01:59 PM

mine does it on occasion when im cruising around about 70-75mph... mine is a multiple random misfire... could be a serious issue or a tuning problem

hitmanws6 · 05-13-2009, 02:55 PM

i just checked the wire. it felt like it wasnt put on all the way. i pushed it on and need to see if it worked

eseibel67 · 05-13-2009, 08:53 PM

Flashing SES light means a problem that should be corrected immediately before you cook your catalytic convertors.

Michael02hawk · 05-14-2009, 05:42 PM

Quote:

Originally Posted by hitmanws6

already checked the plugs/wires. engine is less than a week old

If its a new engine in there, as you just stated...the flashing SES light is most likely a False Misfire DTC. The flashing SES light does not throw a code to be read.

To properly correct the problem, perform a CKP Variation Re-Learn:

http://www.seattleautomotive.com/ckpdoc.htm

This will sync your new engine with the PCM in order to detect a real misfire.

I think the dealer usually charges $90, my local garage charged me $50 for the relearn.

Post back and let us know how you made out.