Good morning.

Three days ago, I removed the catalyst, I had a very strange sound and vibration coming from the engine and poor acceleration.
After I removed the catalyst, I put a straight pipe and I regained normal acceleration.
This morning it was back to the same vibration but acceleration was still better than with the catalyst. These are the codes: P0103. P0272.P1000.

OBD-ii Code P0103 definition: Basically, this means that there is a problem with the Mass Air Flow High (MAF) sensor or circuit. A more technical description would be that the MAF circuit had higher than expected voltage (air flow). I ordered a new one.


P0272. imbalance #4 cylinder. I run the engine at idle and unplug the cable for the following #4/#2 injectors and both are very weak comparing to the remaining six cylinders.
Am a bit worried and my concern if a head gasket is next. The injectors were overhaul two years ago, and the milage added since overhaul; 976.

I had a strange uncontrolled acceleration from 1000 - 2800 RPM and the code 2286. I replace the ICP and that took care of that problem. Code P1000, because I disconnected the battery cable before replacing the ICP.

Just to let you know, I change oil and filters end of the year because I will never meet the milage in the owner's handbook. I use full synthetics Valvoline 5W-40 and I add one REV-X additive.
All filters are Motorcraft. (I would like to add that the cylinder misfiring is intermittent, at time they all work normal and when you turn off the engine the next startup, misfires until you turn off the engine again.)

If you have an idea what I can also check, it will be appreciated.

Regards

K Leerdam

 

Do a bubble test real quick to make sure you don't have a leaky seal on those injectors. Just take off the upper fuel regulator cap and watch for bubbles in the fuel as you crank the engine from the wire under the hood (key off so it doesn't start). If it bubbles, it means air is leaking past the injector. A leak on one injector can travel down the fuel/oil? rail to adjoining injectors one and make the problem seem worse.

You might also just confirm adequate fuel pressure to that bowl while you have it open. Siphon out what's in it, then have someone turn the key on (not cranking) while you watch how fast the bowl fills up. It should fill up quickly, just a few seconds, so have your partner ready to turn if off.

FYI, that the standard process, but without a partner, you might be able to do this test by disconnecting the batteries, and then replacing the driver's ground cable with the ignition already on - basically using the battery ground as an on/off switch for the ignition.

272 is just a contrib code, and not the electrical code, but it still could be an electrical issue, if I understand correctly (disclaimer: history says that's unlikely), so inspect all that, but I'd chase fuel and oil first.

While you're doing that cranking under the hood, with the cap back on, listen to confirm it's a smooth, even crank. If not, if you can hear it hitting a dead cylinder in the crank, then you got bigger problems for sure.

The MAF code can be like the 1000, IIRC - gets set a lot when you leave it disconnected and crank the engine. Check the filter minder on your air filter and that all the clamps are in place along the air intake system, but it prolly goes away when the sensor is reconnected.

 

Kenneth leerdam <leerdamkenneth@gmail.com>
10:11 AM (1 minute ago)
to Ford

Thank you very much, I will look at what you have sent me.
Two comments: the fuel pressure at idle is 64 PSI, and while driven it stays at 64. If I accelerate full throttle it might drop to 60 PSI. I drove for almost two weeks with the pressure gauge hook up to the fuel bowl, and never did change.

Concerning cranking the engine key off. The engine turns with one sound; there is not high and low singing as if there is a bad cylinder.
I will check the fuel bowl like you explain and will get back to you.
I have a feeling the injectors might be the problem but I will do the fuel bubbles check first.

Thank you very much for your time spent in helping me get it running.

Regards

K leerdam

 

Mostly, I was giving you some things to do while you waited for someone better than me to advise. Have you searched this forum for threads on P0272? Limit your search to the 6.0 section and you'll find a lot of threads and the common solutions. You haven't said anything that indicates head gaskets. Is their oil in your coolant? Is there white coolant residue about the degas bottle cap? Not sure which brand of injectors you used in that last "overhaul," but there are lots of stories here about people who had problems and early failures with remans from the popular auto parts stores. Ford remans or some of the high-dollar new injectors from a select few specialty dealers are the recommendation.

#4 is prolly the easiest injector to replace. All the ones on the driver's side are easier than the passenger side. The second time you do it, it's a 2-3 hour job tops.

Also, always good to check your oil level dealing with injector issues. If an injector tip broke off, maybe due to some bad fuel with lots of water, for example, it'll dump fuel into a cylinder which drains to the crankcase. Prolly not your problem, but just something to look at real quick - is it overfull? If so, you have the potential for a runaway engine, or as I call it, "The Gates of Hell." You will never look at your truck the same again.

 

Hello Bonehead.

I finally got over to check the fuel bowl today. No bubbles at all, I turn the engine for quite some time but nothing like bubbles.
What I notice today is that the injector self-test key on, I can hardly hear the injectors buzzing, very low ticking and short. I accustomed of hearing them cycling plenty longer that what I heard today. Tomorrow when am back I will check the compression for two and four cylinders, just to rule out bad cylinder. But I think the injectors are bad. The volts on the FICM: 48 key on and engine running 47.5.
I will let you know by noon how it went with the 2/4 CYL compression check.

Thank you.

Will keep InTouch.

RGDS

K Leerdam

 

Sounds good. I've been knee-deep in my other cars this week and am beat tonight. Have you searched for threads here on that P0272? Here's some general info to put you to sleep tonight. Your symptoms are prolly in Chart 7, and it refers to Section5 pinpoints, so I attached those.

 

hmm, uploading slow, two more after this

 

slow upload, one more

 

here's the last one.

 

Hello Friend.

Today I did the compression check. I only did NO 4 cylinder after I saw the results. I have a Pittsburgh diesel engine tester. but in the set, there was not fittings for the glow plug thread, so I had to fabricate one. The reason I explain that you know how these things work out; rough and ready and compression escaping. The first test gave 300 psi but it very fast around four strokes looking at the reaction of the needle. The truck was parked for some time now I decided spout some oil into the cylinder and let it blowout before taking the next reading. With the same four strokes the gauge went to 400 psi in four compression strokes. Base on the fact that #4 cylinder was the cylinder with imbalance, I did not worry to check #2 cylinder. I think the injectors is bad. Standing Infront of the truck hood open the injectors cycling you can hardly hear them. I will order them tonight.

Thank you very much for the help.
When I replace the injectors, I will back to you.

Regards

K Leerdam