1987 bronco 4.9l straight 6 issue - Ford Forum - Enthusiast Forums for Ford Owners


Ford Bronco One of the original SUVs, offered in both a full size Bronco, or the more compact Bronco II.

Reply
 
 
 
Thread Tools Search this Thread
  #1  
Old 04-25-2018, 10:22 AM
Junior Member
Thread Starter
 
Join Date: Apr 2018
Posts: 1
Default 1987 bronco 4.9l straight 6 issue

Hey guys I just got a 1987 Ford bronco with the 4.9l in-line 6. It has been sitting for about 2 years. Sometimes it is hard to start without starting fluid but when it starts it will start up every time until it sits overnight. It idles good but if you give it a lot of gas itís like it smothers out and almost dies until you let off. If you ease into the throttle it will rev up as high as you let it and it will hold at that rpm. The fuel pumps had good pressure. Has a new fuel pressure regulator and a new fuel pump relay. It was missing a vacuum hose from the vacuum tee to the map sensor. If you put that hose on it will start sputtering and almost dies. I know itís a lot but any help would be greatly appreciated
Reply With Quote
  #2  
Old 04-25-2018, 07:53 PM
Senior Member
 
Join Date: Jun 2010
Posts: 8,161
Default

Map sensor wire colors shoud be;
Blk-Wht = Grd
Drk Blu-Lt Grn= Signal to ECA
Org-Wht= 5 Volt Ref
With Key on engine off KOEO
Signal wire to ECA should read 1.55 - 1.63 Volts Anything else, replace MAP
Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
1987 ford bronco full size need help before I Blow it up 87broncofrankinstien New Member Area 3 02-10-2010 03:41 PM
1987 Bronco 2 II V6 2.9L benz_020 Ford Bronco 0 02-26-2006 09:11 PM
For Sale: 1987 Bronco 2 II V6 2.9L benz_020 PRIVATE For Sale / Trade Classifieds 0 02-26-2006 09:06 PM
Let me get this straight... CobieCane Off Topic 7 09-07-2005 02:08 AM
straight six swap to a 302 semperfi48103 Ford F-150 3 08-30-2004 02:28 AM


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 Off
Refbacks are Off


Advertising
Featured Sponsors
Vendor Directory

All times are GMT -5. The time now is 02:38 AM.


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.