3.8 Running Rich - Mustang Evolution

Go Back   Mustang Evolution > 4 Cylinder | V6 | Classic Mustangs || Tech and Talk > Pre-2005 V6 Mustang



Reply
 
Thread Tools Search this Thread
Please support our sponsors and let them know you heard about them here!
Old 02-09-2011, 11:45 AM   #1
Registered User
Newbie
 
Join Date: Feb 2011
Region: Pennsylvania
Posts: 3
Unhappy 3.8 Running Rich

Hi All,
I have a 98 mustang convertible. I just replaced the computer and the fuel pump. The car is still running rich. Checked the fuel pressure, 70 at the pump, 41 at the rail.
When I start it, the smoke is really thick and will foul the plugs in a few minutes.
Any ideas? I am desperate.
mu_stang is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 02-09-2011, 01:49 PM   #2
Registered Member
Regular
 
stampde's Avatar
 
Join Date: Oct 2010
Location: Manalapan
Region: New Jersey
Posts: 1,880
Re: 3.8 Running Rich

Mass air meter or maybe the coolant temp sensor
__________________
2011 GT Auto
stampde is offline   Reply With Quote
Old 02-09-2011, 01:59 PM   #3
Registered User
Newbie
 
Join Date: Feb 2011
Region: Pennsylvania
Posts: 3
Re: 3.8 Running Rich

Thanks. I tried the temp but will have the garage look at the mass air meter.
Called the garage, any ideas on how to test the mass air meter?
mu_stang is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 02-10-2011, 04:25 AM   #4
Road Trip!
 
Join Date: Sep 2010
Region: Kentucky
Posts: 839
Re: 3.8 Running Rich

If you have a CAI "cold air intake" it will be much easier. But if you don't then you need to pull apart your breather and look at the mass air meter. There should be 4 wires if there is more don't panic just look closely at the sensor and there should be letters like SIG, GND, REF, BATT, or something like that. If it does have only 4 wires then the wires you need to test are the middle two (SIG and GND) you will need a digital volt meter set at 20 volts DC or so.

With the car running at idle probe the two wires and see the voltage reading. It should be anywhere between 0.2--1.5 volts at idle. Then rev the motor to see if the voltage rises slightly "at 60MPH it should read 2.0 volts but this is at load conditions" Also you can disconnect the MAF harness connector and use an ohmmeter and probe the terminals SIG and GND. If the element inside the sensor has been damaged it will be indicated by an open circuit (infinite resistance)

Thats how you test a Mass Air Sensor.
Straublittleman is offline   Reply With Quote
Old 02-10-2011, 05:43 AM   #5
Registered User
Newbie
 
Join Date: Feb 2011
Region: Pennsylvania
Posts: 3
Re: 3.8 Running Rich

Thanks. I am running out of ideas. I do have a cold air intake.
mu_stang is offline   Reply With Quote
Reply

Lower Navigation
Go Back   Mustang Evolution > 4 Cylinder | V6 | Classic Mustangs || Tech and Talk > Pre-2005 V6 Mustang

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
87 Mustang has very high idle and running VERY rich. Any ideas? clannan1 1979-1995 Mustang GT 5 08-21-2010 12:25 PM
I'm RICH!!!! I'm RICH!!!! PureVenom 1996-2004 Mustang GT 34 04-23-2009 10:23 AM
Another 18 year old gets rich off the Net Brent The Bar 4 11-14-2006 12:31 AM
Do u have rich parents MusclesFromBrussels The Bar 28 10-23-2003 09:07 PM

» Like Us On Facebook



03:01 PM


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0

MustangEvolution.com is in no way associated with or endorsed by Ford Motor Company.