Trouble Code - P0171 & P0174 - Ford Truck Enthusiasts Forums

Go Back   Ford Truck Enthusiasts Forums > Performance, Engines & Troubleshooting > Ford V6 > 2.6, 2.8, 2.9, 4.0 & SOHC 4.0 V6
Log In 

Trouble Code - P0171 & P0174

LinkBack Thread Tools Search this Thread
Old 03-30-2012, 12:05 AM
fortknox81 fortknox81 is offline
New User
Join Date: Mar 2012
Posts: 3
fortknox81 is starting off with a positive reputation.
Trouble Code - P0171 & P0174

I have a 99 Ford Explorer 4wd 4.0L EFI SOHC 6cyl. Car will start giving out on me when I'm coming to a stop and then idle erratically. As I'm taking off again it will hesitate and surge. Now this ONLY happens in the summer when it is fairly hot and usually after its been driven through out the day and at the hottest point of the day. Just seems like when gets to a certain air temp outside it will act this way. I am getting trouble code P0171 & P0174 or P0172 & P0175 can't remember. I changed the MAF sensor and checked the fuel pressure. I had an auto part salesman tell me they could hear a vacuum leak but only when the engine was revved really quick. I thought maybe the sound they was hearing was air being sucked into the intake manifold. I can't hear a one continuous leak and couldn't find one using propane and hose or carburetor cleaner. The car wasn't acting up when I was trying to find the leak or when the auto part salesman said he could hear it, would that make a difference when trying to find a leak? And am I on the right path looking for a leak or does it sound like something else?
Reply With Quote
Old 04-28-2012, 03:32 PM
critterf1's Avatar
critterf1 critterf1 is offline
Posting Guru
Join Date: Feb 2010
Location: Newport, N.C.
Posts: 2,051
critterf1 has a good reputation on FTE.critterf1 has a good reputation on FTE.critterf1 has a good reputation on FTE.
Vacuum leak.
Speed is a question of money. How fast "CAN" you go?
Reply With Quote

Similar Threads
Thread Thread Starter Forum Replies Last Post
obd code question oldies 2.6, 2.8, 2.9, 4.0 & SOHC 4.0 V6 1 11-08-2014 12:48 PM
Isolator bolts and misfire cyl. 5? .. (P0420, P1131, P1151, P0171, P0174, P0316, and P0305) Im50fast 3.8 & 4.2L V6 7 11-13-2013 11:31 AM
99 Explorer trouble code P0171 & P0174 fortknox81 Expedition & Navigator 1 03-30-2012 02:23 AM
98 Explorer P0171 P0174... canyonbreeze Explorer, Sport Trac, Mountaineer & Aviator 17 10-13-2011 08:28 PM
Dtc P0171, P0174 dennisg_70 1987 - 1996 F150 & Larger F-Series Trucks 0 08-29-2005 12:41 PM

Go Back   Ford Truck Enthusiasts Forums > Performance, Engines & Troubleshooting > Ford V6 > 2.6, 2.8, 2.9, 4.0 & SOHC 4.0 V6

0174, 2003, 30, 68, code, explorer, find, ford, leak, p0171, p0174, surge, trouble, troubleshooting, v10, v6, vacuum, vulcan

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

All times are GMT -5. The time now is 01:10 AM.


Advertising - Terms of Use - Privacy Statement - Terms of Service - 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