That's about the only explanation since other injectors Was Clean

Use your judgement on Pulling Banjoes Off it might not need it

If you did pull banjo and blow just do the 1 side that had the bad inject and it maynot need that IDK

 

I would replace that inject holddown to be safe

It may got Tweaked since inject didn't seat right

 

i highly doubt the copper burned away. look up the combustion temp of copper, it would leave very obvious traces. temps that hot there would be serious erosion\jetting on the injector surface and the bore in the head. No way it would all burn up 100%. It fell off during install or got foregotten on 1 hole. Nobody is perfect.



Well maybe me :-) J/K

 

The Copper washer gets Burned up from Overfuel condition from what I understand Seen more then 1/2dozen that was missing the washer on here

If copper washer would been Missed IDK ifthe Injector wouldn't have run for almost 1 year I think it would have Burned up the Orings fast

maybe the washer is still in the Inject cup IDK

 

One would think a trace of the washer would be visible, but you never know. As suggested take a good look at the cup.

 

I see that (Copper melting Point Temp) Inside the cylinder being Achieved Very easy with an Overfuel condition from injector Dumping Fuel in

Iv seen guys on here get to 1500+ at there EGT Sensor so inside the Cylinders themselves it gets Way Hotter

IMO if Copper washer is Not in the Inject cup THEN it Burned up

All the Evidence is covered in SOOT


1,984°F (1,085°C)
Copper, Melting point

<table class="infobox bordered" style="width: 22em; text-align: left;" border="1" cellspacing="0" cellpadding="2"><tbody><tr><th>http://en.wikipedia.org/wiki/Melting_point</th><td>1357.77 http://en.wikipedia.org/wiki/Kelvin, 1084.62 °C, 1984.32 °F</td></tr></tbody></table>---------------------

Over fuel will also Burn a Hole into the Piston

 

melted copper is still copper it had to go somewhere. copper burning will be much hicher, but either way temps that high the injector is going to show signs of it. For sure temps that high are not impossible. as far as his sig indicates, I'm assuming stock injectors and a tune more or less. unless his tune is totally stupid his temps shouldn't be stratospheric

 

The injector Fails First (Likely the Plunger) and starts to Overfuel causing High temps

Im thinking Gravity points to the copper ending up on top the piston

 

I'm running Viv n Eric's n Matt's Race tunes. I'm not towing and the Injectors are 175 75's with a Stage 3 71mm Madturbowerks Turbo.

Thanks again for all the help and apologies for hijacking the OP thread.

I'll go update my Sig to see if anything lights up as obvious.

Denny

 

Well that certainly does change things

 

LOL, agreed but it still doesn't change the fact that it ran fine for almost a year, the stuff is below the fuel section on the injectors could only have gotten in there during install and most likely kept the injector from seating completely and torquing correctly thus melting the Cu washer over time.

Thank God it didn't hydro lock, just ran rough on inclines and NEVER threw a CEL code.

D

 

Right it took time for the injector Plunger to Fail and overfuel to burn the washer

YOU Need more then the BLUE SPRING!!!! MAYBE the RAG caused Fuel STarvation to that inject

You need aRegulated Fuel return for your Injectos and TUNES tat Injector Died from FUEL STARVATION most likely and Killed the pluger and then Leaked out the Pintal causing Overfuel

That's ^^common way to fail (As long as a Rag isn't part the Install LOL)

Now the Kicker is the Rag and how much it played
I don't think the RAG caused any Seal Issue since it ran a Year

It may have Starved the inject for fuel though

 

Is that Screen on the Far side of the Pic have Bits of RAG in it??? It just looks like it did????????????????????????????

But hard to tell

Those screens let the fuel in the inject

 

If this was done at a SHop WHEN these injectors went in Thenit really Looks like Sabatoge to me

Maybe it got missed but I doubt it

The shop was going to blame inject especialy if the rag was in that screen on 1 side they new it would take time to fail


If you installed them (Or a Friend) then of coarse it got missed you wouldn't do that intentional

 

Good News... I think.... I found the Cu Washer in the bottom of the injector cup. It was soot covered but still it's original size and shape. This was #5 so I had to use a mirror and flashlight to see it.

A 20+ yr. Ford Tech performed the work at FORD Dealer, but died a few days later HT so I can't kill him... lol

The thread could've got in the holes from wipiing it off and carrying it around to get pictures. It was all originally under the bottom o-ring in a tight constriction circling the injector as if it was twisted on it purposely.

Denny