Blinking check engine light

kevden wrote:

Gdetrailer wrote:

wa8yxm wrote:

Bobbo wrote:
A solid check engine light means check the codes whenever it is convenient.

A blinking check engine light means pull over, stop and call a tow truck.

Happened to my brother once as he was pulling off the freeway in his Detroit Diesel Powered Semi. His made it to the end of the ramp and coasted onto the shoulder.. Buddy said "Wooee, Looks like the clown car at the circus with flames shooting out from under the hood"

He left the terminal with a Detroit Diesel under the hood. By the time he stopped (near instant after the light came on) He had two halves of a Detroit Diesel under the hood.. Not so little brother (6'6.5" tall to my 6'3" but younger) is a certified Diesel Mechanic (Also Auto) Inspected it, Hitched a ride to the truck stop a short distance away..Called Detroit D His buddy dropped his trailer and they went back intending to pull his tractor out from under his trailer, then pick up his trailer and tow it to the truck stop.. Tow truck was already hooking up to tractor (Detroit D sent the Tow) so they took the trailer back.. Detroit had a new engine, AND an installer, on a plane the next day putting it in and he was on the road again.

Blinking Check Engine is serious.

Blinking engine light on a DIESEL is a DIFFERENT BEAST..

Each manufacturer has their own "system" to what functions a particular light means.. So no way to compare the actions of a Detroit Diesel to a Ford 5.4/6.8 engine light.

NOT THE SAME AS A FORD 5.4/6.8 gas engine, PERIOD.

I have personally been down this road with a 2006 5.4 and am very well versed on this..

Fords CEL (which in this case looks like a little engine Icon) ONLY MEANS a malfunction has been detected which can affect engine performance power wise or emission wise..

IT DOES NOT MEAN THAT ENGINE DAMAGE IS OCCURRING!

I can assure you and anyone else on Fords of this vintage and most since the 1990s there is not going to be flames, broken engine parts or severe damage done with a blinking or steady CEL.

Engine damage might not occur, but catalytic converter damage will likely occur if the cause is lack of ignition. Unburned fuel will enter the cat and temps will skyrocket and kill it in seconds.
So, instead of a $150 tow bill you now have a $1100 or more cat(s) replacement bill.

UMM.. NO.

Generic replacement CATS are LESS than $200 each INSTALLED for the 5.4/6.8 engines.

I sure as heck would not want to live around where YOU ARE if you are paying $1100 for Cats.

You do not seem to understand the WAY Fords light works, the OP did not feel any miss, but the computer noticed.. In this case the computer BLINKS the Service engine soon light.. When the event is over the blinking stops..

It is merely letting you know that an even happened, the event STOPPED, no code was stored.. But may have kept the event as a pending code..

In this case also the OPs vehicle HAS SO MANY MILES on the cats they actually may be near done..

Unfortunately there is NO WAY ANY GARAGE WILL EVER "FIND" THE PROBLEM WITHOUT FURTHER CODES SO TOWING IT TO A GARAGE WILL COST THE OP MUCH MORE THAN A SET OF CATS!!!

It is INTERMITTENT AND ALL THE GARAGE WILL DO IS BLAST IT WITH BUNCHES OF PARTS AND A LOT OF LABOR!

I have personally been down this road.

Our 2006 truck cost us $2500 in "repairs" over nearly 9 months with over 8 "returns" to the garage..

The garage in their wise wisdom TOSSED PARTS at our problem and even one of their badly handled repairs DAMAGED one of the CATS..

I ended up PERSONALLY finding and fixing the problems the garage caused in order to eventually find and fix the original problem which turned out in my case to be a sticking throttle plate.. But not until I was fed up spending money at the garage (which by the way IS a FORD DEALER GARAGE, if THEY can fix it without throwing parts at it I doubt any other garage could either, after all they HAVE all the tools and manuals).

Your "know it all" BS is boring me and if the OP follows your advice most likely will end up hauling their vehicle to the scrap yard when they start seeing several thousands in repair bills and still not fixed.. I know, I was at that point..

OP does need to check the COMMON "problems" with this engine..

#1 VACUUM LEAK, a well known issue with the PVC vacuum line CRACKING.. This CAN cause random miss fires.

#2 is possible bad COP, Buy ONE Motorcraft COP, one at a time sub the new in for each cylinder.. If light blinks under heavy acceleration after all cylinders has had the new COP then that is not the problem. COPS do not always set a check engine light (ran into that with my 2003).

OP HAS a reader now and can check the fuel trim values this will help to pin point what is going on.. Fuel trim tells you if it is too lean or too rich which COULD lead to EVENTUAL CAT damage if not corrected or if EXCESSIVELY over lean or rich.

The front OXY sensors handle the lean/rich of the engine for fuel trim numbers, that is why that info is so important..

One must think like a detective and not haphazardly toss parts at it.