2002 Harley Davidson f150 5.4 supercharged

Reply Subscribe

Thread Tools

Search this Thread

Jan 4, 2019 | 03:07 AM

Texmex1980

Thread Starter

Member

Joined: Sep 2018

Posts: 11

Likes: 0

2002 Harley Davidson f150 5.4 supercharged

Spark plug replacements. Are the bosch double platinums # 1803 any good for this truck there pre gapped at .050. I'm running 8 to 10 boost

Jan 4, 2019 | 10:26 AM

glc

Senior Member

Joined: Dec 2006

Posts: 43,526

Likes: 817

From: Joplin MO

Nope. These Ford engines do not like Bosch plugs.

Read this thread in the Lightning forum for suggestions:

https://www.f150online.com/forums/li...-lighting.html

Quote:

NGK TR6's gapped to your boost level or the stock motorcrafts are what you need

Jan 4, 2019 | 03:19 PM

Texmex1980

Thread Starter

Member

Joined: Sep 2018

Posts: 11

Likes: 0

Spark plug gap

Ngk tr6 what gap at 8-10 lbs of boost or
motorcraft sp 471 plugs at what gap
I do more highway driving than city

Last edited by Texmex1980; Jan 4, 2019 at 03:22 PM.

Jan 4, 2019 | 06:04 PM

glc

Senior Member

Joined: Dec 2006

Posts: 43,526

Likes: 817

From: Joplin MO

Stock boost is .042 gap, close it up .001 for each pound over stock.

Jan 4, 2019 | 06:11 PM

Texmex1980

Thread Starter

Member

Joined: Sep 2018

Posts: 11

Likes: 0

Ngk tr6 it is

I'm going to tighten it up a little .040
thanks

Jan 4, 2019 | 09:30 PM

glc

Senior Member

Joined: Dec 2006

Posts: 43,526

Likes: 817

From: Joplin MO

Torque them to 28 ft/lb to prevent loosening, thread stripping, and blowout.

Jan 4, 2019 | 09:32 PM

Texmex1980

Thread Starter

Member

Joined: Sep 2018

Posts: 11

Likes: 0

Ten-four

Reply Subscribe

Reply Share

First
Prev
1 / 1
Next
Last