tagle281

On the upper deflector there's also a deflector on the backside of the intercooler. Is that part of the fix or can that be removed? I have a 13 and mine has only the two deflectors on top.

Ford850

The deflector on the top-back is standard and should not be removed. It is part of the original design prior to all the TSBs etc.

TRiGGeR605

I removed the top deflector. It looks like the bottom deflector is non-existent on my truck. ---2013

vozaday

Same here. Just removed mine, going to see how much they will charge just to update the computer.

alsalz11

I have 2013 Platinum Screw with 25k miles. Bought it used, so cannot confirm the status of TSB or reflash. All i know is i have the "AC" intercooler with the two top deflectors.

I had grown tired of poor (12.0-13.4 average) mpg, rough jumpy idle, and extra sooty black tailpipe. I have never experienced the shudder in wet conditions but definetly experienced a pronounced LAG when i stomped the throttle.

After some research to explore my hunch...decided to pull spark plugs. Gaps were all at .034, but rear passenger side plug (motorcraft CYFS12YT3) had two vertical cracks all the way through the insulator. Plugs look similar to NGK iridiums that came on my WRX.

Reinstalled old plugs after cleaning them, and replaced cracked one. Feels like the ecu is still learning the new configuration, but after a trip reset i am already seeing my avg mpg increase to 15.4 with mixed driving with headroom if i baby it more.

I do not know all the ins and outs of the fixes: but I highly reccomend those with the TSB and shutter and mpg issues to pull and check plugs carefully.

vozaday

I have never experienced the rain shudder. I just want max stock power potential, that is why I removed the shield and going to get the computer reprogrammed.

Edit: truck goes in today. Keep ya updated. I reset my computer this morning so I should have a good comparison with the computer learning both ways.

vozaday

My little review.

I didn't notice much of a power increase, but then again it usually takes 20-30 hp gain before my but dyno notices anything.

Throttle response is a bit better, on the highway the turbos spool up like now, so that's a plus.

Biggest thing I noticed was the tranny shift. You can't even feel it downshift, if you put it down to 75% throttle it goes from 5th to 2nd at 80km/50mph without even touching 3rd or 4th. Even from 5th to 2nd you couldn't tell it shifted if it wasn't for hearing the engine rev up.

Not sure how any of that is supposed to stop the stumble though. But so far like the performance. Plus best part was the dealer covered the cost.

pfbz

At less than $5 each, I can't imagine going through the trouble to pull spark plugs with 25K miles on them, then reinstalling the old ones!

The Eco's seem to eat plugs at a faster than normal rate. No biggie though, when you can get a set of OEM replacements for under $28 shipped from Rock auto.

sr160009

I ordered mine about 3 weeks ago, should be here around the first half of April. This is a stupid question, but mine should be up to date??

alsalz11

PFBZ:

Main reason I put stock plugs back in was that a full set of identical replacement plugs was not available at my local hardware store and I dont feel like messing with the dealer.

My goal was to ensure that my plugs were gapped correctly. Call me naive or unprepared, but I was not convinced i would find a failed plug. I needed to answer my question on plug condition.

I call it a win because i have the peace of mind from identifying my problem and a plan to rectify it. So now that I confirmed my truck suffers from the systematic problem, I will be on the early plug replacement program.

Also, The fuel saved in short term outweighs the cost of one plug and a few minutes of easy work. I have done a good share of mechanic work and maintenance, and I enjoy it.

Vozaday: Sounds like you are describing the transmission shift learning process that occurs after any reflash.