that was the old worn out plugs. i gapped the new motorcrafts at .054, installed the dielectric grease on the global coils. followed advice of you guys. but the #2 and #7 misfires are still there. also installed the stage3 injectors from ebay. what should i do to trouble shoot these coils. if it was one i would change it, but it is the same two as before. not really worried about the cats, if i get the thing running i will put hi-flow cats and new exhaust. by the way tumba, i appreciate all the help i can get. wish ford woulda jus put the 351w in these trucks..lol

 

You're welcome!
But I liked the Cleveland

 

That is a 351 or was, the 330 replaced it. A hell of allot better than the 351. We have a 351 in a F250 here that just died last week - more work to do..- I'll take the 330 over that one any-day.

So you purchased new Coils? Was 2 & 7 missing before installing the new ones? Then the same result with the new plugs and coils? If that's the case , the motors probably toast. Do a compression test.

Tumba - You didn't like the Modified "M"

The Windsor's Emission light came on, then wouldn't start after that - Dead - No click,No power, battery is great.

 

yes, but i was gonna tune it up anyway so thats done. the only thing is, i actually tried changing the #7 before the total tune-up and it still misfired. i changed it again during the tune-up. feel like it and #2 are getting cheated, if you will.

 

Sounds like the valves are gone , rings to. Explains "Blue" smoke. I would do a compression test to confirm.

How many miles?

 

how can this be verified? why does it give a misfire? don't understand. 116K. the truck sat up for a while. the smoke is not constant. i guess i will get a compression test done. i just don't know.

 

the computer will give a misfire if the valves are bad?

 

P0133 - Heated Oxygen Sensor Bank 1 Sensor 1
P1401 - DPFE Sensor Voltage High

I would replace DPFE sensor if you havent already, they are common on Fords to fail. I would make sure the hoses to the DPFE sensor are in good condition and check the wiring.

Spark plug gap should be between .05 / .055 inches or 1.32 / 1.42 millimeters.

After you set gap to all the plugs to the correct gap, and replace the DPFE sensor. Run the truck. If you still have a missfire on cylinder 7 I would check dry/wet compression (possible blowby), check for coolant in they cylinder (head gasket), ensure you have fuel and spark to that cylinder, and if all those pass, I would say you have a burnt valve.

 

Computer may or may not give a code for a mechanical missfire. I've had a few with burnt valves that did and didnt give a CEL no matter how far you drove them

You can pull out the spark plugs from cylinders 2 and 7 and put them in different cylinders (1 and 3), then put the coils from 2 and 7 in different cylinders (4 and 8) and run the truck. See what cylinders show missfire, that way you can eliminate either coils or plugs or both and it would then be a mechanical failure.

 

Someone here needs to post up the thread about the correct dpfe sensors,
I know Brew has the link. But the brand replacement is very important.
Post it up someone, I lost it in my bookmarks

 

I would just go through Ford and get one, I dont believe they are to expensive.

Ford part number F77Z9J460AB

 

I have had the dealership try to pass the wrong one onto me, by saying it was an updated model

 

Oh hah! I work at a shop so I get ford parts for through the dealer directly, so if its the wrong part I just send it back and try again, I can see how it would be a pisser if I had to drive all the way up there everytime the part was wrong!

 

Good posts IRONSIN,Tumba.

I'm going on the misfires as these should be handled first. For the most part ,that's the rule of thumb.

Unless I'm reading this wrong, he has the same problematic cylinders after a plug and coil change. This can throw the system out of wack, in turn contribute to other problems/codes..

A compression test will reveal an internal problem, that's what I think should be done next. Write all readings down when doing so for comparison.

pu2ded0 - A Cylinder will not fire right or at all without the right compression. I'm thinking if your in the 120's the engines on it's way out. 150 - 170's is ballpark, but what you need to see is how much 2 & 7 vary from the others. The variance will tell you most likely. I can get the chart for you - There's a certain way this needs to be performed.

Tumba, Link - http://www.fordscorpio.co.uk/egrmonitor.htm

 

Got it.
Thanks again