i have an intermittant problem with a cyl missing... i does not throw a code however there was a service history on number 1 cyl.... i am new to the
F150 club and now i am trying to get a few bugs worked out -- i have a odbII tool but it shows no codes ? i am confused -- any insight would be appreciated 2001 SCrew 5.4 with 80k

 

It's very very difficult for these computer's to detect that type of failure until the problem worsens.

Therefore, people usually end up taking there vehicles to the dealership and pay a heavy cost for them to pull the necessary info out your comps memory to evaluate, diagnose and fix.

Heres what I would do - First disconnect the battery for 15 minutes then connect. This will wake up the misfire monitor as your computer test's and resets .
Take it for a ride and push your truck to perform (get on it!!) any time you get the chance .
This has been the only way I've been able to set code in with past misfire issue's..

Pushing your motor while the monitors active is your best shot..

 

I had the same problem and whatever you do, DO NOT PUSH THE ENGINE UNDER MISSFIRE. You could seriously damage ur rods or even a cat.

Ok here is what u do. Remove the COP, Remove the boot. Clean the coil with some fiber optic cleaner and let dry really good. Take a compressor and blow out the spark plug hole (with the spark plug still in) Then take out the plug and wipe it off really good. Its probably covered in oil. If so there is your problem. I always have this problem becuase i broke the screw hole that holds in the coil and now the coil falls out occasionally so water will get trapped inbetween the coil and the sparkplug, thus grounding the spark causing no spark in the cylinder and no ignition of fuel.

make sure everything is clean and reassemble. I hope this helps.

 

He doesn't know what COP it is. What your telling him to do is a big waste of time at this point . Anyway, your comp will shut down your injectors before any damage can be done - "limp mode"

His COPs failing under a load , pushing the motor while the monitor activated will elevate the problem hopefully enough to run it outside of the default parameters and produce a MIL with a code pending.

Without said light , you won't find it unless you know someone that can mode 6 it for cylinder counts (history) or you run a coil probe thru the firewall and have someone monitor the probe blinks during a drivecycle - you need the tool for that..

These are handy -

 

i dont know how to take off the little wire connector -- i looked for a tab but i cant see or feel anything ... can someone be specific as to how to remove this little ****** ? i will post when i determine a fix ...

 

What the crap are you talking about , the spring


Oh , wait , I know what you mean - you just push the tab down, then disconnect

 

i cant seem to figure how to remove the connector that clips on to the cop ?

 

Yeah , I edited my last post - figured that's what you were talking about ..

 

that is the whole issue -- and thanks

 

Hayseed you can try this, start your truck and open the engine lid then pull each of the injector plugs one at a time and listen if the engine starts to stutter. Whichever one you pull and you don't hear the engine shuddering that's the faulty COP.

 

That usually only works under Primary failure - COP's most of the time fail under certain loads within a drivecycle.

If he had primary failure instead of intermittent , the engine light would be freakin glowin..

COP's just suck

 

I have the same year and engine screw also. Also just had the exact same problem. Listen to jbrew, he knows what he is talking about. My COP's would only fail under load. I could get the service engine soon light to come on when I pushed it hard, but then by the time I got to Autozone to pull the code the freakin light would go off. I am a firm believer now that if a COP is going bad there are more to follow, had it happen to me, and drove me nuts. Buy 8 new coils from the guy on ebay for $105 and 8 new Motorcraft plugs. By the way mine started misfiring when I was just over 80,000 miles. Even if for some reason it is not the COP and you still have the problem after you are done you just gave your truck a hell of a tune up for $120, mine was like driving a new truck.....just my two cents, but I would listen to jbrew, just look at his past posts and see how many people he has helped....

Need more information just ask....

 

Thanks for the compliments smasie , Yeah, you still can't beat that COP deal on ebay , I know Kevin @ Global Automotive still sells 8 COP's for $96 = $12 a piece AND they have 1 full year warranty to boot!! The dealerships can't come close to that deal.

Yes , if you replace them all at the same time you bring your motor back to life - Handsdown, the very best tune up possible ..

Here's The Link - http://cgi.ebay.com/ebaymotors/NEW-I...mZ160111254456

 

Starting in second gear will put more load on the engine. If you can find a nice steep hill......


JMC

 

Coil on Plug Problem and Solution!
Well I think I discovered the solution, quick, easy and cheap. about $4 bucks to give this a try

In Novemeber, I sprayed all COPS with STP wire dryer, It solved the problem for about 2 months,

The next time it acted up, I sprayed just one side very liberally, let it dry, to identify which side had the bad coil It was the passenger side.

I then thought about it, and it seem that the coil on plugs dont nessasarily go bad, water finds it way into the spark plug opening, being trapped and arcing the spark, which is why the check engine light does not come on, the COP is GOOD, it is sending sprak to the plug , just shorting out on the way down to the plug.

There apparently is a pliable gasket at the bottom of the cop to prevent water getting down into the plug recess, when gasket is unlubed, water gets trapped and causes missfire. Thats why sometimes it may go away if you burn it off.

So I sprayed the STP Wire dryer liberally on top of the cops, and around the base. Let dry for an hour, It has entirely solved the problem. Now ok Since January!

I wonder how much Ford dealerships have profited from THIS design flaw when the cops were actually ok?