BDFX4

Where is the tuning forum at???




Bob

TheWhiteBeast

Has anyone regapped the plugs on a 5.0?

brianc142

Can someone please explain the whole "regapping the plugs" for me. I have never heard of having to do this and don't want to have to fool with it. I didn't have to do it for the T4 tune I have so why is it that some are having to do this with the T5? Is it necessary?

brucesears

If you didn't have any misfires or hesitation with the T4 you probably won't with T5 either. It was advisable to gap the plugs at .028-.030 for the T4 tune as well.


Necessary? Depends on what model year your truck is, if it's a 11 or 12 I would suggest it needs it. 2013 or 2014 may not need it. How many miles on the truck? Any more than 30K miles I would suggest new ones. Several people's were toasted at 40K miles.

Schmidty_

I was reading around those SP 534's will be fine in the 11 and 12 ecoboost's right. Because they call for another plug if you look it up.. I don't know if they changed thread's or not?

SkiSmuggs

My dealer doesn't carry the SP-528 now, just the SP-534 that I have in my 2011 Ecoboost. The oil filter part # changed once or twice also.

SkiSmuggs

If you haven't heard about doing this, you haven't been on here much as it has been a major topic of discussion for a couple of years. It seems there wasn't much quality control for plug gaps. The 2011s were speced at .033-.037. After many reports of poor running, Ford changed the spec to .030-.033. Folks checking their plug gaps were finding .038 to .045 on a lot of plugs causing spark blowout. Testing by folks indicates that .030 is the sweet spot for stock and .025-.030 for tuned engines with higher boost. If you are not having a problem, you either have plugs that are close to being gapped correctly or you don't push it much.
My originals were gapped about .040 and I had surging when pulling hills or towing. I had my plugs swapped at 41K with new ones gapped at .030 and it took care of the problem. The tech said my original plugs were shot so don't believe the 100K service for plugs either. 35,000 makes more sense.

c-one

Yes, you're good. I asked a friend of mine in the service dept.

c-one

+1
I had no issues (surging, rough idle) with the stock plugs. Now with that said, the stockers I pulled out ranged from .35-.40. Once I swapped in the new ones at .30, I could clearly tell a difference. Stock, T4 and T5. The only issue I had was with the .30 gapped plugs and the stock map. The check engine light came on. I cleared it and programmed my T4 and it's never ran stronger. I then programmed the T5 and it's a smooth rocket train. The check engine light never returned.

brianc142

Unfortunately I spend most of my time deployed so I haven't done as much research as I should have I guess. I have a 2013 with around 3K miles. I installed the T4 at probably 1K. Maybe I should have waited but it seemed the general consensus was it would be fine. I've had no issues with the T4 so hopefully I'll have the same results with the T5. Thanks for the information gentlemen.