Go Back   Ford Truck Enthusiasts Forums > Newer Light Duty Trucks > Lightning, Harley-Davidson F-150, Roush F-150 & Saleen F-150
Sign in using an external account
Register Forgot Password?


Lightning, Harley-Davidson F-150, Roush F-150 & Saleen F-150 SVT Ford F150 Lightning, Roush, Saleen and other performance F150's

Welcome to Ford-Trucks Forums!
Welcome to Ford-Trucks.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Ford-Trucks Forums community today!





 
Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 11-16-2011, 07:22 PM
Traxxis's Avatar
Traxxis Traxxis is offline
Postmaster
 
Join Date: May 2003
Location: Claremore
Posts: 2,603
Traxxis has a great reputation on FTE.Traxxis has a great reputation on FTE.Traxxis has a great reputation on FTE.Traxxis has a great reputation on FTE.Traxxis has a great reputation on FTE.Traxxis has a great reputation on FTE.
1999 Lightning Engine Knock

The problem: A loud engine knock, on the passenger side, around the valve cover, seemingly between cylinder 2 and 3. It does NOT do it at idle, and tends to start around 1900 rpm, and persists until around 3200 rpm. Cruising down the interstate at 70 mph, I can hear it. It primarily does it when the motor is under little to no load, and is noticeably worse when I let my foot off the pedal and coast. Weather and temperature do not seem to have any effect.

The video: Sorry for the fairly poor sound quality, it's difficult to get good audio on a phone with the fan blowing. Don't pay much attention to the video unless you see something glaring as I was mainly trying to focus on the audio rather than where the camera was pointed.
1999 Ford Lightning engine knock - YouTube

All spark plugs have been removed, inspected (well, to the best of my abilities) and replaced. They all have a orangish/brown hue to them. The pictures below show cylinder 1, 2 and 3...
Click the image to open in full size.
Click the image to open in full size.
(ignore the ghost)
Click the image to open in full size.

The previous owner (my brother) said it has been doing it for a while, probably 5-6k miles if I were to guess, so I went ahead and made the return trip home from Maryland to Oklahoma in it, which amounted to around 1,300 miles. Thinking it was a lifter and not knowing when the last oil change was, I thought I would give a motor flush a shot to see if I could knock any sludge loose that might be blocking any passageways. Replaced the oil with Motorcraft synthetic blend, and Motorcraft oil filter, but alas, no luck... the knock persists.

The knock is definitely coming from the passenger side, and seems to come from around the number 2 or 3 cylinder. In an attempt to trouble shoot it, I disconnected the coil to number 3 as the motor was running, and the sound was noticeably quieter.

Again, all plugs have been pulled, inspected and re-installed. All plugs are snug (which seems to be the most common fix).

One final note, the motor has spit a plug before, about 30k miles ago. It spit number 2 and was supposedly fixed by Ford. I notice that it is the only one with a different coil too, which would lead me to think they only worked on the one cylinder.

Thanks in advanced. I'll continue combing the search to see if I can run across something else before I pull the valve cover. I also thought about checking the flex plate.
__________________
'94 Ranger XLT Ext. Cab 3.0L 5-speed
'97 Ranger XLT Ext. Cab 2.3L 5-speed

Reply With Quote
  #2  
Old 12-07-2011, 07:26 PM
dlibson's Avatar
dlibson dlibson is offline
Post Fiend
 
Join Date: Jun 2006
Location: Lino Lakes, MN
Posts: 11,168
dlibson has much to be proud ofdlibson has much to be proud ofdlibson has much to be proud ofdlibson has much to be proud ofdlibson has much to be proud ofdlibson has much to be proud ofdlibson has much to be proud ofdlibson has much to be proud ofdlibson has much to be proud of
Well, first thing I would say is piston or bearing problem. Run a compression test first, see if you have good compression on all 4 and if it is even across the 4. If it is, you can rule out head/valve problems for the most part. Then it will be lower end time...
__________________
David
2005 F450 6.0 CC XLB DRW. Sinister Coolant Filter, Blue Spring, Straight Piped, Edge Juice Platinum w/attitude!
2009 Rage'n Stryker 4005 Toy Hauler

Reply With Quote
Old 12-07-2011, 07:26 PM
 
 
 
Reply

Go Back   Ford Truck Enthusiasts Forums > Newer Light Duty Trucks > Lightning, Harley-Davidson F-150, Roush F-150 & Saleen F-150

Tags
1999, 58, engine, ford, knocking, lightning, motor, parts, passenger, plug, roush, sale, side, spark, troubleshooting, trucks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Jawbone Canyon - Buku pics - No story bpounds California, Southern Chapter 10 04-04-2014 08:30 AM
2003 expy console organizer cecoen Expedition & Navigator 1 08-08-2013 12:32 PM
1958 F100: confusing items under hood? msauls 1957 - 1960 F100 & Larger F-Series Trucks 5 12-15-2012 06:56 PM
Flatheads at the NASCAR Hall of Fame Doc 1948 - 1956 F1, F100 & Larger F-Series Trucks 10 06-24-2012 06:24 PM
Dual battery installation with pix NBC-Steve 1973 - 1979 F-100 & Larger F-Series Trucks 14 05-02-2011 07:00 PM



All times are GMT -5. The time now is 11:21 PM.


Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup