Notices
1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

changed spark plug gap, lost MPG's

Thread Tools
 
Search this Thread
 
Old Apr 21, 2009 | 08:52 PM
  #16  
88grandmarquis's Avatar
88grandmarquis
Thread Starter
|
Laughing Gas
20 Year Member
Photogenic
Joined: Nov 2002
Posts: 1,143
Likes: 18
I check and recheck pretty much everything I do under the hood. The plug gap is re-checked about three times before it actually goes in the hole. If I happen to tap the head with the plug, I re-check gap again before installing.

Quicklook2, Jesus Christ, give me some freakin' time. I work 10+ hour shifts. Was just down in the garage. Reset the ECM, pulled codes (clear), and discovered a bad u-joint ("clunk" has been annoying me since Saturday).
 
Reply
Old Apr 25, 2009 | 11:11 PM
  #17  
88grandmarquis's Avatar
88grandmarquis
Thread Starter
|
Laughing Gas
20 Year Member
Photogenic
Joined: Nov 2002
Posts: 1,143
Likes: 18
Resetting the ECM didn't change anything. Still got low MPG's on today's drive. Will regap the plugs when I get time and see what that does.
 
Reply
Old Apr 26, 2009 | 07:27 AM
  #18  
EPNCSU2006's Avatar
EPNCSU2006
Lead Driver
20 Year Member
Joined: Nov 2002
Posts: 9,557
Likes: 44
From: Concord, NC
What gap are you going to use? Let us know what you find.
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
1986F150six
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
210
Dec 6, 2021 10:10 PM
SHOpar
1983 - 2012 Ranger & B-Series
1
Jan 22, 2015 11:26 PM
big-ugly
Ford Inline Six, 200, 250, 4.9L / 300
36
Jan 21, 2015 05:12 PM
Gr8Abe
2007 - 2014 Expedition & Navigator
3
Dec 13, 2014 10:01 PM
evenbogey
1987 - 1996 F150 & Larger F-Series Trucks
7
Jun 14, 2001 03:33 PM




All times are GMT -5. The time now is 08:08 AM.

story-0
10 Things Every Truck Owner NEEDS (2026 Edition)

Slideshow: the best gifts for dads & grads

By Michael S. Palmer | 2026-06-02 21:45:57


VIEW MORE
story-1
Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath

Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.

By Verdad Gallardo | 2026-05-30 18:33:59


VIEW MORE
story-2
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer

Slideshow: 10 most expensive Ford trucks ever sold on Bring a Trailer.

By Joe Kucinski | 2026-05-27 16:24:34


VIEW MORE
story-3
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)

Here's everything that has changed for the latest model year.

By Brett Foote | 2026-05-27 16:17:28


VIEW MORE
story-4
Top 10 Ford Truck Tragedies

Slideshow: Top 10 Ford truck tragedies.

By Joe Kucinski | 2026-05-18 19:34:33


VIEW MORE
story-5
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

And it might be even better than that.

By Brett Foote | 2026-05-18 19:26:42


VIEW MORE
story-6
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

Slideshow: Does lowering an F-150 Lobo RUIN the ride quality?

By Michael S. Palmer | 2026-05-18 19:20:37


VIEW MORE
story-7
Ford's 2001 Explorer Sportsman Concept Looks For a New Home

Slideshow: Ford's bizarre fishing-themed Explorer concept has resurfaced after spending decades largely forgotten.

By Verdad Gallardo | 2026-05-12 18:07:46


VIEW MORE
story-8
10 Best Ford Truck Engines We Miss the Most!

Slideshow: The 10 best Ford truck engines we miss the most.

By Joe Kucinski | 2026-05-12 13:09:47


VIEW MORE
story-9
2026 Shelby F-150 Off-Road: Better Than a Raptor R?

Slideshow: first look at the 810 hp 2026 Shelby F-150 Off-Road!

By Brett Foote | 2026-05-12 12:50:07


VIEW MORE