Go Back   Ford Truck Enthusiasts Forums > Small Chassis Trucks > Aerostar
Sign in using an external account
Register Forgot Password?


Aerostar Ford Aerostar

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 02-15-2008, 08:40 PM
460's Avatar
460 460 is offline
Elder User
 
Join Date: Mar 2005
Location: In the Middle
Posts: 994
460 is gaining momentum as a positive member of FTE.
rough idle, engine misses. Unplugging MAF helps.

1995 3.0
Engine will start, but idle very rough and try to die. Once warm, the engine will idle, but it's very rough. In "PARK" and holding the gas pedal/RPM at typical highway speed the engine has a bad miss. The exhaust stinks.

Unplugging the MAF sensor will make the check engine light come on, but the engine will then run very smoothly. As soon as I plug the MAF back in it will idle rough and try to die.

What am I doing when I unplug the MAF? Where should I start looking for the problem?



Reply With Quote
  #2  
Old 02-15-2008, 09:55 PM
96_4wdr's Avatar
96_4wdr 96_4wdr is offline
Post Fiend
 
Join Date: Apr 2005
Location: Washington state
Posts: 5,543
96_4wdr is gaining momentum as a positive member of FTE.
MAF element is dirty or broken
try cleaning first, search Aero forum for MAF cleaning

http://www.muscularmustangs.com/maf.php

pull codes and please post
http://fordfuelinjection.com/?p=13

MAF sensor element or heater may be broken or burned out.

Last edited by 96_4wdr; 02-15-2008 at 10:00 PM.
Reply With Quote
  #3  
Old 02-15-2008, 09:59 PM
eehoepp eehoepp is offline
Elder User
 
Join Date: Feb 2003
Location: Tottenham Ontario Canada
Posts: 586
eehoepp is starting off with a positive reputation.
When you unplug the MAF, the computer resorts to default settings for the air/fuel mix. Since it runs well in this condition, it is safe to assume the engine is mechanically sound.

When connected, the MAF sensor is reporting incorrect airflow into the engine. The computer adds the amount of fuel it expects the engine will need, but it is sufficiently off that the engine runs poorly and the exhaust stinks (sulphur/rotten eggs?).

The hot wire in the MAF sensor is probably dirty. There have been many threads in this forum which detail how to clean the MAF sensor. Use the search function to look for these. If cleaning doesn't make an improvement, you may need to replace the MAF sensor.

If cleaning does help, you should check to make sure the air filter is clean and sitting in the housing properly. Also note that the oiled gauze air filters (K&N, etc.) are known to contaminate the hot wire.
__________________
Cheers, Eric

96 3.0L 2WD Aerostar 122,000 km
95 3.0L 2WD Aerostar rusted beyond salvation at 434,000 km (stripping for parts). Reliable to its last day.
89 7.3IDI F-Super Duty flatbed to haul the big stuff
Reply With Quote
  #4  
Old 02-15-2008, 10:53 PM
460's Avatar
460 460 is offline
Elder User
 
Join Date: Mar 2005
Location: In the Middle
Posts: 994
460 is gaining momentum as a positive member of FTE.
Ok... my brother put a new alternator on this van a couple months ago, and it hasn't ran right since. Now, fast forward to tonight... per advice given in this thread, I started to inspect the MAF for a possible problem. The first problem is the clamp that holds the rubber intake tube to the MAF wasn't tight at all... making a nice air leak. Now is when it gets good... he put a shop towel in the MAF sensor to "keep mice out" while replacing the alternator and forgot to remove it when he was done!!! Lol, the aggravation that someone else's silly mistake has caused me! Anyway, my Dad is glad his van is running right again, and thanks to all who replied
Reply With Quote
  #5  
Old 02-15-2008, 11:02 PM
96_4wdr's Avatar
96_4wdr 96_4wdr is offline
Post Fiend
 
Join Date: Apr 2005
Location: Washington state
Posts: 5,543
96_4wdr is gaining momentum as a positive member of FTE.
a mouse thru the engine air intake and out the exhaust is far worse than a cat thru the fan

cat quits howling after a few minutes, mouse pellets just keep rattling
Reply With Quote
  #6  
Old 02-16-2008, 02:41 AM
DCRB DCRB is offline
Posting Guru
 
Join Date: Aug 2007
Location: Portland, Oregon
Posts: 1,036
DCRB is starting off with a positive reputation.
Quote:
Originally Posted by 96_4wdr
a mouse thru the engine air intake and out the exhaust is far worse than a cat thru the fan

cat quits howling after a few minutes, mouse pellets just keep rattling

... accept that the maf has a built in screen on it to keep mousies out?
__________________
88 civic hatch - rebuilding from the ground up, too many mods.
97 vw passat glx vr6 wagon - daily grinder
95 4.0l 2wd xlt extended - old reliable turn key family savior
97 awd xlt extended - "new" work horse
Reply With Quote
  #7  
Old 02-16-2008, 09:25 AM
Pablo-UA Pablo-UA is offline
Post Fiend
 
Join Date: Oct 2005
Location: Lugansk, Ukraine
Posts: 5,186
Pablo-UA is gaining momentum as a positive member of FTE.
How much is MAF? Just replace and that is all, forget about it for next 10 years (if you replace air filter in time)....
Reply With Quote
  #8  
Old 02-16-2008, 11:30 AM
copper_90680's Avatar
copper_90680 copper_90680 is offline
Moderator
 
Join Date: Sep 2003
Location: Southern California
Posts: 4,391
copper_90680 has a brilliant futurecopper_90680 has a brilliant futurecopper_90680 has a brilliant futurecopper_90680 has a brilliant futurecopper_90680 has a brilliant futurecopper_90680 has a brilliant futurecopper_90680 has a brilliant futurecopper_90680 has a brilliant futurecopper_90680 has a brilliant futurecopper_90680 has a brilliant futurecopper_90680 has a brilliant future
The MAF on my 4.0L actually went bad a few months back. I tried cleaning it several times but without luck. I bought a used one on Ebay for about $30 and that worked great. You just have to make sure it has the same part number and the correct version number.
__________________
Tung

Please check out our guideline
http://www.ford-trucks.com/guidelines.html

Wife? What wife? Oh, The Supreme Commander!
Reply With Quote
  #9  
Old 02-16-2008, 02:48 PM
Pablo-UA Pablo-UA is offline
Post Fiend
 
Join Date: Oct 2005
Location: Lugansk, Ukraine
Posts: 5,186
Pablo-UA is gaining momentum as a positive member of FTE.
The MAF on my 4.0L actually went bad a few months back. I tried cleaning it several times but without luck. I bought a used one on Ebay for about $30 and that worked great. You just have to make sure it has the same part number and the correct version number.
__________________________________________________ _______

Yeah, there are different versions of MAF, with small film inside ore with nicel-chrom hair ore othe type....

ECM is parametrized for relevant MAF.
Reply With Quote
  #10  
Old 04-09-2008, 11:32 AM
AutoAppearancesInc AutoAppearancesInc is offline
Junior User
 
Join Date: Feb 2008
Posts: 63
AutoAppearancesInc is starting off with a positive reputation.
Quote:
Originally Posted by copper_90680 View Post
The MAF on my 4.0L actually went bad a few months back. I tried cleaning it several times but without luck. I bought a used one on Ebay for about $30 and that worked great. You just have to make sure it has the same part number and the correct version number.

Man I love this forum!!!

I need a MAF sensor for my 89 4.0 aerstar.
Long story: I broke while cleaning it!!!!!!!!!!!

I think found one on ebay out of a 4.0 explorer:
Does anyone know if this would fit:
Here are the numbers on the MAF:
PBT-GF30
F57F-12B579-AA
5E25

and here are the numbers on mine:
ABCD
F07F-128579-AA
AFH55-05
9D28

Thanks
Reply With Quote
  #11  
Old 04-09-2008, 02:39 PM
96_4wdr's Avatar
96_4wdr 96_4wdr is offline
Post Fiend
 
Join Date: Apr 2005
Location: Washington state
Posts: 5,543
96_4wdr is gaining momentum as a positive member of FTE.
the first year the 4.0L V6 was avail in the Aero was 1990
you sure you have a 89 with 4L? may be a DIYer changeout?

go to RockAuto. com site sponsor for the best service and exact part for your MAF, best prices also. super fast service and shipment

don't use the Ranger MAF, for an OBDII EEC-V system
Reply With Quote
  #12  
Old 04-09-2008, 09:18 PM
AutoAppearancesInc AutoAppearancesInc is offline
Junior User
 
Join Date: Feb 2008
Posts: 63
AutoAppearancesInc is starting off with a positive reputation.
Quote:
Originally Posted by 96_4wdr View Post
the first year the 4.0L V6 was avail in the Aero was 1990
you sure you have a 89 with 4L? may be a DIYer changeout?

go to RockAuto. com site sponsor for the best service and exact part for your MAF, best prices also. super fast service and shipment

don't use the Ranger MAF, for an OBDII EEC-V system
Oh YES it is a DIYer.. I bought it from a friend of mine in 1997 and everytime I see him he tells me something that has been changed out on the van.. I forgot that the engine was swapped.. but I got it for a good price and it still runs well..

MAF I list was suppose to be from a 4.0 explorer.....

Could it be possible that the MAF on my van is from the 3.0 engine????

I was hopping to get a used one, cash it tight right now..
But I will check out rockauto.com

Thanks
Reply With Quote
  #13  
Old 04-10-2008, 02:56 AM
96_4wdr's Avatar
96_4wdr 96_4wdr is offline
Post Fiend
 
Join Date: Apr 2005
Location: Washington state
Posts: 5,543
96_4wdr is gaining momentum as a positive member of FTE.
the pre 96 Aero 4Ls call for a F07F-12B579A2B
any MAF from 4L ranger, explorer or aero pre '95 should be fine.

used MAFs are a shot in the dark. if left out exposed at junke yarde partse emporium, they often corrode electrically. air flow rate calibration may be wrong from corrosion

from cross reference use same MAF
FORD AEROSTAR (1990 - 1995)
FORD EXPLORER (1992 - 1994)
FORD RANGER (1990 - 1994)
FORD RANGER SUPER (1990 - 1994)
LINCOLN TOWN CAR CARTIER (1991 - 1992)
LINCOLN TOWN CAR EXECUTIVE (1991 - 1992)
LINCOLN TOWN CAR SIGNATURE (1991 - 1992)
Reply With Quote
  #14  
Old 04-10-2008, 10:03 AM
Bear River Bear River is offline
Former ******
 
Join Date: Nov 2004
Location: Salt Lake City, Utah
Posts: 4,901
Bear River has a very good reputation on FTE.Bear River has a very good reputation on FTE.Bear River has a very good reputation on FTE.Bear River has a very good reputation on FTE.
I would just buy a new one.
At RockAuto, they have rebuilt units ranging from $104-$166 depending upon brand.

All the choices they list would be good, though I would lean towards Cardone or ACDelco.

In any case, don't buy a used one.
Reply With Quote
  #15  
Old 04-10-2008, 01:01 PM
AutoAppearancesInc AutoAppearancesInc is offline
Junior User
 
Join Date: Feb 2008
Posts: 63
AutoAppearancesInc is starting off with a positive reputation.
Guys:

Thanks for the cross references and all the advice....
Reply With Quote
Old 04-10-2008, 01:01 PM
Reply

Go Back   Ford Truck Enthusiasts Forums > Small Chassis Trucks > Aerostar

Tags
1992, 1994, 94, air, car, explorer, f150, flow, ford, idle, location, maf, mass, rough, sensor, town

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 On
Pingbacks are On
Refbacks are On
Forum Jump



All times are GMT -5. The time now is 09:38 AM.


Powered by vBulletin® Version 3.7.5
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