View Here : Check Engine Light Flashing
I have a theory if the plug intaller didnt change the wires its possible that the wires could have separated internally at the boot contact when they got pulled, it could have been fine for a while, spark jumping the gap , then corrosion/erosion could be causing intermittent spark as it tries to jump , now showing up now as a misfire
When the engine light is flashing it means you are doing harm to the catalictic convertors which are very expense for those truck and have a chance of plugging up and cause your truck to run like a bag of crap.
All new vehicles come with an on-board diagnostics port which hooks up to the vehicle's computer. Whenever the vehicle detects that something may be wrong--whether it's an emissions-related problem, cooling system issue, engine problem or something as simple as a loose gas cap, in some cases--the Check Engine light will appear.
when i get up to around 5000 rpm(downshift passing 4l60e) the check engine light flashes for about 20 sec then goes off.. bugging the hell out of me, other wise ...
The check engine light illuminates when your vehicle's computer believes there is a problem that could affect — or is affecting — your car's emissions control system.
Note that the Check Engine Light (CEL) is also referred to as the Malfunction Indication lamp (MIL) in some documentation. If the CEL) remains on during normal operation then the ECU has detected a possible fault.
Your “Check Engine” light comes on when your car’s onboard computer (or PCM, Powertrain Control Module) records some kind of problem. This onboard computer runs your car so that it has optimum fuel economy and low emissions.
I’m not at all what you would call a car guy, but that’s exactly why I decided to write an article on this topic. As someone who knows little about cars, and has seen the check engine light come on in his cars more than a few times over the years, I’m starting to become something of an expert on this problem.
Flashing check engine light. - I had my fuel injectors and spark plugs changed last month due to a check engine light and code saying that I had a cyli...
A malfunction indicator lamp (MIL), or check engine light, is a tell-tale that a computerized engine-management system uses to indicate a malfunction. Found on the instrument panel of most automobiles, it usually bears the legend check engine, service engine soon, or a pictogram of an engine - and when illuminated it is typically either an amber or red color.