1997 - 2003 Ford F150 General discussion on the Ford 1997 - 2003 F150 truck.

99 F150 Bogging issue.

Old 02-14-2013
  #1  
Junior Member
Thread Starter
 
Join Date: Feb 2013
Posts: 11
Default 99 F150 Bogging issue.

Hello members. Any help is appreciated on this issue. My 99 F150 4.6 4x4 started bogging a few months back. It is slowly getting worst. It happened after a back yard mechanic installed reverse light under the rear bumper and at the same time I ran the fuel tank really low. So this sent me a wild goose chase trying to figure out what was causing the bogging. This is a list that I have done so far. (By it was throwing a #1 cylinder misfire while bogging)

Fuel filter - replaced
PCM - replaced
MAF - cleaned
# 1 cylinder compression good
Catalytic - good
fuel pressure(while bogging) - good
coil - replaced
spark plugs - new
egr - new
clean fuel injector # 1 cylinder - done.
vacuum tested - good

I did a short test and the is anywhere from 11 - 12.5 volts running through the negative post and ground wire.
Pulled all fuses and relays and minor drops in voltage but nothing over 1 volt.

After I ran some Seafoam through the tank the code didn't show up anymore. Now no codes are coming up.

I am completely stumbled. vv
ridgetop is offline  
Old 02-14-2013
  #2  
Senior Member

 
Purplehazeir's Avatar
 
Join Date: Jan 2011
Location: Arlington, WA
Posts: 1,436
Default

Have you run a compression test on the cylinders?
If it has an electric fuel pump, did you pull the pump from the tank and look at the pre-filter on the pickup tube?
Purplehazeir is offline  
Old 02-14-2013
  #3  
Junior Member
Thread Starter
 
Join Date: Feb 2013
Posts: 11
Default 99 F150 Bogging issue.

I did a compression test on #1 cylinder only. The spark plug that came out of there was really ash fouled and the the code that was coming up while bogging was #1 misfire.
I like the idea of the pre-filter on the pickup tube. That kinda makes sense because the bogging started when I ran the tank super low.
I did a pressure test when driving and there was slight drop in pressure while bogging like 3-4 psi.

I guess the pre-filter on the pickup tube filters before the in-line fuel filter?
ridgetop is offline  
Old 02-15-2013
  #4  
Senior Member

 
Purplehazeir's Avatar
 
Join Date: Jan 2011
Location: Arlington, WA
Posts: 1,436
Default

If you have a pre-filter it will be on the pickup tube. The last time I experienced this problem was on a 2000 Ford Focus. The lining of the tank was done poorly and de-laminated and plugged up the pickup. I had to pull the entire pump assembly out and clean it off. Not sure what type of pump assembly you have, but it would be one area I would look at. I would also open the fuel line from the motor to the tank and blow some compressed air through it and see if you get any debris out.
Purplehazeir is offline  
Old 04-07-2013
  #5  
Junior Member
Thread Starter
 
Join Date: Feb 2013
Posts: 11
Default It was the head gasket

Pulled the coolant reservoir lid off and had lots of oil in there. Not sure why the vacuum test didn't pick that up!
ridgetop is offline  
Old 04-07-2013
  #6  
Senior Member

 
Purplehazeir's Avatar
 
Join Date: Jan 2011
Location: Arlington, WA
Posts: 1,436
Default

Originally Posted by ridgetop View Post
Pulled the coolant reservoir lid off and had lots of oil in there. Not sure why the vacuum test didn't pick that up!
That's a problem.
Purplehazeir is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
PBRFan
2004 - 2008 Ford F150
19
09-06-2018 04:33 PM
jaltman1984
1987 - 1996 Ford F150
0
02-25-2014 05:28 PM
Brian333
2004 - 2008 Ford F150
4
01-27-2014 07:16 PM
Gustafer
1997 - 2003 Ford F150
2
07-23-2013 11:50 AM
Mwalczak
2004 - 2008 Ford F150
5
12-26-2011 09:35 PM

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 

Thread Tools
Search this Thread
Quick Reply: 99 F150 Bogging issue.


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.