Help...Flashing SES Light, No code
Thread Starter
TECH Fanatic
iTrader: (26)
Joined: Feb 2005
Posts: 1,155
Likes: 1
From: Rochester, NY
Help...Flashing SES Light, No code Engine has forged internals, with a mild cam, 207/220, .574/.574, stage 2 ported heads. The car sounds great, runs great, and just dyno-tuned with ls1-edit. Fuel pressure is great, and A/F is perfect, through-out the entire rpm range 0-6000. I doubt there is a misfire.
Since the install I will get a flashing SES light, if I maintain the rpms between 2000 - 2900. If I pass 3000rpms, the light immediately shuts off. If I drop down below 2000rpms, the light will shut off after about 20 seconds.
It does not throw a code.
The P0300 code has been shut off - yet the light still flashes!
Any ideas?
Since the install I will get a flashing SES light, if I maintain the rpms between 2000 - 2900. If I pass 3000rpms, the light immediately shuts off. If I drop down below 2000rpms, the light will shut off after about 20 seconds.
It does not throw a code.
The P0300 code has been shut off - yet the light still flashes!
Any ideas?
generaly a flashing SES light means an extremely rich condition that could damage catylitic converter, usually a p0300 would be set with it as well..not sure what else...weird that you have no codes.
yea man my car used to have the same problem, but i ran o2 sims and it still did it but less often. After i had it tuned the light never came on. Not sure whats causin it but I wouldnt worry if ur getting good numbers/ and its not running to lean.
A bad misfire usually causes it to flash. However if you have the codes turned off it is not going to set a code. I would pull the plugs and see if you find anything out of the ordinary.
Trending Topics
Thread Starter
TECH Fanatic
iTrader: (26)
Joined: Feb 2005
Posts: 1,155
Likes: 1
From: Rochester, NY
So, even though the code is shut off, P0300, that doesnt prevent it from flashing the SES light? Hhmmm, okay, makes sense. I'll re-enable the code, and see if it then logs the (any) codes.
Also, it was just Dynotuned 2 days ago. The Fuel Pressure, A/F, and all other monitors are reading A+. Its not running rich, nor lean, through the entire RPM range.
I'll work with it some more, and see what comes of it all.
---------------------
A bad misfire usually causes it to flash. However if you have the codes turned off it is not going to set a code. I would pull the plugs and see if you find anything out of the ordinary.
Also, it was just Dynotuned 2 days ago. The Fuel Pressure, A/F, and all other monitors are reading A+. Its not running rich, nor lean, through the entire RPM range.
I'll work with it some more, and see what comes of it all.
---------------------
A bad misfire usually causes it to flash. However if you have the codes turned off it is not going to set a code. I would pull the plugs and see if you find anything out of the ordinary.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?
Pouria Savadkouei
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
