Engine stalls after warming up - F150online Forums

Go Back   F150online Forums > Powertrain & Mechanical > V8 Engines
Log In 

Engine stalls after warming up

Thread Tools Search this Thread
Old 05-19-2005, 10:47 PM
Join Date: Jan 2001
Posts: 19
Engine stalls after warming up

I have a F-150 '98, 4.2L V6. I'm having these problems after warm up:
-When the engine is started it runs fine for a few minutes.
-After it warms up, it starts to idle rough and then it seems that it wants to stall. This is with the truck parked.
-When I try to drive it, it wants to bog down at certain times making it nearly undriveable. If I drive it right after I start it is drives fine only before warming.

I noticed the first weird sign when the fuel was very low and it started to idel rough. I refueled and it went away. A couple of days after that I left my lights on and the battery went dead (old battery) and I replaced it. Now the problem started. I know the system had resetted because it the loss of power. It drives so bad that I don't want to drive it till the system adjusts itself. I had never had such a bad idle after the power was taken off.

I had them checked for codes but none came up. The said maybe the oxygen sensors might be faulty. I had changed the both front sensors a year ago for another reason. What do you think?

I appreciate any help you can offer me.
Thanks, Tpietersz
Reply With Quote
Old 05-19-2005, 11:08 PM
Senior Member
Join Date: Feb 2001
Location: Guyton, GA USA
Vehicle: 2012 Ford F150
Posts: 748
Try cleaning or replacing your Idle air control vavle (IAC valve).
Reply With Quote
Old 05-20-2005, 11:38 AM
Join Date: Jan 2001
Posts: 19

Thanks Yankee7985, I'll try it out and see what it does.
Reply With Quote
Old 05-20-2005, 01:15 PM
Join Date: Sep 2004
Location: Bloomington, Indiana
Vehicle: 1997 Ford f150
Posts: 47
Send a message via AIM to bhudoff
Just a thought, make sure the MAF (Massive Air Flow sensor) connection is tight. And also, if you oil your air filter. The MAF could be contaminated but I believe yank is right
I am not a complete idiot, I am missing some parts~!
If Drywall screws, Duct-tape and bread ties won't fix it. Trade it off..

Jed Clamp'it
Reply With Quote


Similar Threads
Thread Thread Starter Forum Replies Last Post
NEED HELP - 2007 5.4l 3v XLT low oil pressure when warm MrCarlson V8 Engines 7 09-08-2015 10:21 AM
1992 F150 stalls and code help ftw46 V8 Engines 13 08-31-2015 01:01 PM
transmission and engine problem johny89 Pre-1997 Models 8 08-05-2015 11:11 AM
Stopped shifting normally delu Transmissions 3 07-27-2015 06:20 PM
04 FX4 Issues Bonder 2004 - 2008 F-150 5 07-20-2015 02:46 PM

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 Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off

All times are GMT -4. The time now is 06:01 AM.

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. Fordé is a registered trademark of the Ford Motor Company