START IDLE, RUNS THEN DIES - Forums at Modded Mustangs
 
LinkBack Thread Tools
post #1 of 7 Old October 4th, 2007, 04:42 PM Thread Starter
Newbie
 
Join Date: Sep 2007
Posts: 34
 
iTrader: 0 reviews
START IDLE, RUNS THEN DIES

Hey guys/gals..


i have a problem that is *(&(%) me up the car is a a 1986 mustang 50 fi [speed density]

here's what happens, hard start-if left to idle for about a min it dies boom! shuts right down and if you try to give it ANY throttle it's like you hit a kill switch ,....but sometimes if you just floor the car it will run at about 3000 rpm but lumpy sounding as if a cam were in it [but it's stock] if you release the throttle it smooths out for a second and will go to 3500 rpm [sort of acts like a backwards gas peddle revs from floored to idle as opposed the the normal way....but then it dies after a few seconds while idling, will run forever but crappy as described but ONLY IF IT'S FLOORED!



codes I have are low voltage to fue pump relay...maf sensor [replaced it] map sensor [replaced it but still have the code after clearing it] tp sensor out of adjustment code [but got that code when I adjusted it]


my guess at this point is a fuel pump but wanted opinions on this



any ideas/?
slownomo is offline  
Sponsored Links
Advertisement
 
post #2 of 7 Old October 4th, 2007, 07:11 PM
The Hammer
 
G.T. Rags's Avatar
 
Join Date: Mar 2007
Location: Zip's Bubble
Posts: 14,273
                     
iTrader: 1 reviews
u'd prolly get a bigger response in the 5.0 section


Quote:
Originally Posted by TheUNZippee! View Post
I would eat the peanuts out of her shit

Car Salesman Club - The Hammer
ModdedMustangs Conspiracy Group: President
G.T. Rags is offline  
post #3 of 7 Old October 4th, 2007, 10:45 PM
Hardcore Enthusiast
 
homebrewed's Avatar
 
Join Date: Feb 2007
Location: Down in the basement building a rocket
Posts: 1,329
 
iTrader: 0 reviews
how bout the injectors themselves? mine did something similiar to that and it was the injectors. tho. thats just one option...

Founder of the I don't like my shit centerd and want it back the way it was dammit! club

www.myspace.com/evoalliance

greatest band alive

Quote:
Originally Posted by Tony_90fox View Post
I wish there was a :lickmynuts smiley, because i would use it now
:lickmynuts
homebrewed is offline  
post #4 of 7 Old October 5th, 2007, 12:17 AM
MM Fanatic
 
ujslost's Avatar
 
Join Date: Mar 2007
Location: Albertville, AL
Posts: 3,921
Blog Entries: 1
   
iTrader: 1 reviews
Send a message via AIM to ujslost
Im confused, you stated Speed density and then said you replaced the MAF???

Anyhow if it is speed density replace the black box that has a vac hose and a wire connector hooked to it. I for get what its called but I wanta say the Bap sensor. Which is sorta a MAF sensor on the speed density cars.

1986 Mustang GT t-top time piece!
ujslost is offline  
post #5 of 7 Old October 5th, 2007, 01:05 AM Thread Starter
Newbie
 
Join Date: Sep 2007
Posts: 34
 
iTrader: 0 reviews
I know I was only able to see a pic of one speed density car and there was no maf meter/sensor but there is on this one [california?] or canadian? .


I'll clean and test the injectors for some reason I never thought of those as the problem but it makes sense.
slownomo is offline  
post #6 of 7 Old October 6th, 2007, 06:04 AM Thread Starter
Newbie
 
Join Date: Sep 2007
Posts: 34
 
iTrader: 0 reviews
MORE INFO: the car is from CA and it did come stock w/ a maf! freaky huh? and i am thinking more and more like it might be a bad pcm gotta do more testing but christ every sensor and even the dist. was replaced [before i got it]

QUESTION can i swap in a 9al ? it has a maf but is it still a speed density set up? or not?
slownomo is offline  
post #7 of 7 Old October 6th, 2007, 11:20 AM
Hardcore Enthusiast
 
homebrewed's Avatar
 
Join Date: Feb 2007
Location: Down in the basement building a rocket
Posts: 1,329
 
iTrader: 0 reviews
I should think so. My car was an '88 4cyl and its got a '91 drivetrain and the PCM/harness out of a GT

Founder of the I don't like my shit centerd and want it back the way it was dammit! club

www.myspace.com/evoalliance

greatest band alive

Quote:
Originally Posted by Tony_90fox View Post
I wish there was a :lickmynuts smiley, because i would use it now
:lickmynuts
homebrewed is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Forums at Modded Mustangs forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may 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

 
For the best viewing experience please update your browser to Google Chrome