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Old 04-24-2013, 12:02 AM   #561
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Really at a point where I don't know what to do with my truck.

Truck had latest intercooler TSB done 2 months ago, felt very powerful for a few days after then dropped off and misfire came back.

I put in new SP-528's about 1.5-2 months ago I believe, gapped to .032. Truck again felt very powerful for a couple days...then dropped off again. But misfire wasn't really noticeable.

Been driving on these for like I said 1.5-2 months, several thousand miles. Still feels very lacking in the power dept. Haven't noticed an all out misfire like before but sometimes it seems like it hesitates...like the RPM's don't move up at certain points.

Think I am going to put in the SP-534's soon as I get a chance...however I am turkey hunting the next 2 weekends so may be a couple weeks.

Some say the new I/C is a POS causing lack of power...some say plugs...some say coils. What do I try? How much money do I have to throw at a truck still in powertrain warranty?

I think my next step is the SP-534's and try them a couple thousand miles. Then do I buy aftermarket coils and install? Then I need to make the decision of having the dealer look at it again and trying to lemon, or putting on an aftermarket I/C and tune...cause as soon as I do that they are going to blame everything on that. My biggest concern is with all my issues...adding a tune is going to wreck something.

Just wish it ran like the first day I had it. Thats all I want.
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Old 04-24-2013, 12:12 AM   #562
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Are you getting a CEL? If so do you have a way to check it? Mine ended up being fixed completely after a spark plug regap and one coil being replaced. It mainly only misfired on the tune, but still did not run that good stock. I believe it was the coil more than the spark plug gap though.
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Old 04-24-2013, 04:52 AM   #563
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Quote:
Originally Posted by excitemef150 View Post

Hey, curious --- what is your mpg? My sucks at 17 average on highway I travelled 20 times. It used to be 19.8 mpg and best 20.1. I'm not seeing any fuel milage improvement with recent MPT tune 87 economy with chilled.

Maybe I should ask Mike from MPT...but wanted you to answer what kinds of mileage your experiencing. It seems the cold weather is almost over, been getting low 15s to 17.8 tops. Need a real solution here!
Remember not everyone drives the same. Through the winter months it was in the high 17's and back in the 19s as it has warmed up, depending on my recent driving. I have a lot of short trips and will get on it quite a bit pushing it down, if I drive like that it can be in the 17s now. The 19s when I just go to work lol.
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Old 04-24-2013, 10:16 AM   #564
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Originally Posted by excitemef150 View Post
Hey, curious --- what is your mpg? My sucks at 17 average on highway I travelled 20 times. It used to be 19.8 mpg and best 20.1. I'm not seeing any fuel milage improvement with recent MPT tune 87 economy with chilled.

Maybe I should ask Mike from MPT...but wanted you to answer what kinds of mileage your experiencing. It seems the cold weather is almost over, been getting low 15s to 17.8 tops. Need a real solution here!
I still have the stock SP-528 plugs (with set of SP-534 on standby). I was getting high 17s on 50 mph country rolling country roads in the winter and just broke 20 with warmer weather. No short trips, 34 miles each way commute.l
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Old 04-24-2013, 01:44 PM   #565
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Post Eco sparked plugs sucks!

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Originally Posted by MadocHandyman View Post
Seems to be many here finding a variance in their plug gaps and they are mentioned in many threads. Thought I would start one to maybe list your stock gap if it was indeed out.
If its out of spec and you changed it, let us know what it was and if it helped resolve any issues such as the 55 mph shudder and rough idle.
Stock is 0.035 and torqued to 133 in/lbs ( this was posted previously by another member, thanks!)

On this note, I did check mine today.
2 were at 0.039
3 were at 0.037
1 was at 0.036
I regapped all to 0.034
The 2 at 039 had a bit of carbon on the side electrode
I have the 55 shudder and will report back if it's any better.
I have mine changed yesterday 4/23/13! Measured each ford ecoboost sparky and I get consistent ave gap of .041 to .045. I replaced them with NGK gapped at .030. Did a test drive of about 14 miles n sounds slightly smoother in rev and acceleration. I have pics of dirty ford sparky if anyone wants to see.
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Old 04-24-2013, 02:37 PM   #566
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Originally Posted by Al Kohalic View Post
Are you getting a CEL? If so do you have a way to check it? Mine ended up being fixed completely after a spark plug regap and one coil being replaced. It mainly only misfired on the tune, but still did not run that good stock. I believe it was the coil more than the spark plug gap though.

Never had a CEL with the complete loss of power or misfires.
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Old 04-25-2013, 11:01 AM   #567
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Does anybody know how many ohms the primary and secondary resistance of these coils should read?
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Old 04-25-2013, 06:23 PM   #568
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Originally Posted by Al Kohalic View Post
Does anybody know how many ohms the primary and secondary resistance of these coils should read?
Great idea! Let me know what you find.

Sorry I'm no help, though.

Edit: Be sure to check primary and secondary both to ground, and also primary to secondary. If someone has an OEM service manual or if Haynes is out yet, it should have the values.

Last edited by engineermike; 04-25-2013 at 06:33 PM.
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Old 04-27-2013, 09:38 PM   #569
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Just bought a set of 534's and the guy at the parts desk told me I would void my warranty if I put that plug in an f150 as it was not designed for the fuel mapping. I bought them anyway and will try and find time to install tomorrow. Hopefully it will fix the misfire and limp mode.
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Old 04-28-2013, 09:52 AM   #570
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Originally Posted by CoreyMS View Post
I've got to run them some more to tell but the other day I swapped to the new motorcraft sp-534. It's the new plugs they are putting in the 2013's. They all came gapped at .30
Corey, where did you see that these were the plugs they are putting in the 2013 f150's? Everywhere I have looked it still shows the sp-528 as the part for the '13 f150 and the the sp-534 is for the car-based 3.5 Ecoboost in the '13 Taurus SHO and Explorer Sport.

http://www.fordparts.com/Commerce/Ca...=Ford&mo=F-150

Edit- couldn't get direct link to go, its listed under Ignition>secondary ignition

Just want to make sure its safe to put these in my truck. Thanks.
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Old 04-28-2013, 09:52 AM
 
 
 
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