Erratic idle - EA MPFI - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
Ford Forum Ford Forum

» Auto Insurance
» Featured Product
ยป Wheel & Tire Center

Go Back   Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > The Garage - Tech Forums > Engine Specific Tech > Inline 6 Tech
Register Home Forum Active Topics Photo Gallery Auto Loans Garage Mark Forums Read Auto Escrow

FordForums.com is the premier Ford Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 10-02-2004, 22:35   #1 (permalink)
Vroom vroom
 
spope's Avatar
 
Join Date: Feb 2004
Location: Io
Age: 33
Posts: 233
Erratic idle - EA MPFI

Hello all.
I have a rather annoying problem. My base idle is fine, if I'm in gear or the isc is disconnected, the car idles perfectly at around 650-700 rpm.
When I am in park, however, it's a different story. I started the car earlier, got it warmed up, and when I pulled over and put it in park I noticed the idle seemed to be hunting.
It'll sit at 800 rpm, then go up to 1000, then back down, then up, and so on and so for at around 5 second intervals. This only happened *after* I turned my headlights on.
Is this likely to be a dodgy alternator, low battery voltage, or is my isc stuffed?
Any help would be appreciated, it's driving me nuts.
__________________
EA GL-Ghia pseudo operator
3.9 MPFI converted 4 speed
2.5 inch exhaust
NC Ghia interior (except rear trims)
Fairmont audio (with 4 speakers)
Cruise control
S-pac cluster with white dials
Trip computer and Fairmont interior lighting.
Half wired Ghia BCM.
spope is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 10-03-2004, 03:24   #2 (permalink)
Registered User
 
Join Date: Feb 2004
Posts: 28
Re: Erratic idle - EA MPFI

Disconect your battery and leave it for about 5 min reconect and start engine. If your base idle is OK, Pull park brake on and lights on (high) put it in drive and let it idle for 8-10 min then drive it at 60km/h for 10min then 100km/h. Allthogh this sounds like a lota crap it will "teach" your computer to except whats expected of it, if you know what i mean, give it a try OK
Baz
barman5 is offline   Reply With Quote
Old 10-03-2004, 04:55   #3 (permalink)
'90 EA-II Fairmont
 
SileNceR's Avatar
 
Join Date: Aug 2003
Location: Warrnambool, VIC, Aust.
Age: 29
Posts: 572
Re: Erratic idle - EA MPFI

check the battery terminals... a bit of corosion on mine put the car into limp home and ****ed with my temp guages, even tho everything seemed ok (parkers, temp went up, lows temps even higher (by guage), highs, temps read into the red)
__________________
Rosewood EAII Fairmont 02/90. MPFI 3.9L (formerly CFI), 4spd BTR Auto. Skyline geared 3.45g open center 28 spline 4 pinion differential & axles. 2 1/2" Cat Back Exhaust. King Super Low Springs. Sound: Equalization and amplification by Clarion; Head unit by Sony, Front, Rears and Sub by Pioneer. Planned mods - t5, Extractors, Painting Grey Strips and new front and rear bar.
SileNceR is offline   Reply With Quote
Old 10-03-2004, 16:40   #4 (permalink)
Registered User
 
Join Date: Jul 2003
Location: Nowra, NSW
Age: 51
Posts: 110
Re: Erratic idle - EA MPFI

Quote:
Originally Posted by barman5
Disconect your battery and leave it for about 5 min reconect and start engine. If your base idle is OK, Pull park brake on and lights on (high) put it in drive and let it idle for 8-10 min then drive it at 60km/h for 10min then 100km/h. Allthogh this sounds like a lota crap it will "teach" your computer to except whats expected of it, if you know what i mean, give it a try OK
Baz
What do you do if the base idle isn't okay?
Evil Roy is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

  Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > The Garage - Tech Forums > Engine Specific Tech > Inline 6 Tech



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
EA vs EF, EL, AU Steve General Tech 17 04-16-2005 05:59
Setting base timing on 89 EA 3.9 MPFI samsonEB Inline 6 Tech 2 09-29-2004 14:30
Rmyers now officially drives a mpfi EA :D Rmyers Inline 6 Tech 52 02-25-2004 19:30
Possible EA MPFI Computer Problems - Any ideas??? Long post, appologies in advance. j_biafra88 Inline 6 Tech 4 12-25-2003 22:29
EA Spak misfire on idle!!! pippen Inline 6 Tech 8 12-21-2003 04:39

Powered by vBadvanced CMPS v3.2.2

All times are GMT -7. The time now is 02:37.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.6.0
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.