stalling problem - Muscular Mustangs
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post #1 of 15 Old 10-24-2004, 10:59 AM Thread Starter
 
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stalling problem

was wondering if anyone would know a solution to this, i have a 94 mustang gt 5L, that has stalling issues, when i approach a stop and my RPM dips the car sometimes tends to stall, but will usually restart after 2 or so cranks, at times when i launch the car jumps, now i havereplaced the fuel pump and put in a high flow one along with changing the fuel filter, also i changed the alternator, car overall seems to run a little better but still have the stalling problem, i cleaned the IAC and throttle plate with carb cleaner and cleaned the KN filter, not sure if i have a furl delivery problem or what, last night, i came to a stop at the car stalled and didn't restart i cranked it a few times to the point that the battery was dead, next morning i went to start the car thinking the battery might be dead but was surprised to see it started at first crank, so is there anyone that might know of a solution or what the problem might be, car is fairly stock other then pulleys, exhaust and high flow puel pump?
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post #2 of 15 Old 10-24-2004, 03:39 PM
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I believe there may be a couple of different problems here.

First off the problem you had with the battery seeming to be dead, then back alive the next morning could technically be a few different things, but i have a feeling that it was your starter motor that caused that. Sometimes old starter motors will work fine when cold but on a hot engine or after some cranking they will not work. So i believe it was nothing more than that the car was cranked to the point that the starter overheated. I'm not sure how many grounds there are on your car, but if you can find any i suggest cleaning them, and if you can try looking at the connections on the starter also to make sure they aren't corroded.

As for the stalling....
How does the car idle normally? (other than while coming to a stop)
The reason i ask is because i'm hoping (LOL) that your problem is nothing more than a base idle setting that is too low causing your stalling. I don't know if you have tried this yet but first thing i'd suggest doing is trying to reset the base idle.
https://www.muscularmustangs.com/idlereset.html
In that article it refers to a stop screw. That screw is the one that stops the throttle plate from closing completely. If you look closely at the side of the throttlebody you will see what i mean. Although it refers to a "screw", on my throttlebody (94 cobra, same as your TB) it was nothing more than a small piece of what i'd call threaded rod. So you'll have to turn that piece of threaded rod with a pair of pliars or something.

Also i'm not sure how much it will help but since you have a K&N you might want to try cleaning your MAF wires too, and if you have a voltage meter check the TPS voltage.

One last thing. I'm not telling you to go out and buy one, but i have seen a couple of IAC's that even after cleaning they still didn't work. So it "could" be a bad IAC.

Hope that helps!



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post #3 of 15 Old 10-24-2004, 08:38 PM Thread Starter
 
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ok, you have givin me some new ideas, that i haven't heard before i will try all those things you suggested and see what happens, and btw the car idles at about 600rpm, i will try to raise the idle, is 600 a good place to leave it at or what do you suggest?
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post #4 of 15 Old 10-24-2004, 08:46 PM
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I'm not sure what the Ford specified idle is, but i'd suggest trying to get it to 800-900rpm.
Hope that helps

BTW I sent you an e-mail about your username/password problem.



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post #5 of 15 Old 10-25-2004, 01:45 PM Thread Starter
 
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Hey Mike, was wondering if you had more info or perhaps a picture or diagram on how to up the idle speed, I aint sure how to do it, it doesn't have a screw that you can simply turn, looks complicated, not sure on where or whta to use the pliars on....
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post #6 of 15 Old 10-25-2004, 01:52 PM
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Alright i'll take a few pictures of the throttlebody to show what i mean, but i'm not at home right now so i won't be able to get them up here until later this evening.
Talk to you then



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post #7 of 15 Old 10-25-2004, 05:05 PM
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Here are a couple of pictures of the stock throttlebody from my Cobra which is exactly the same as yours.
In these you can easily see the threaded rod that is used to control how much the throttle plate stays open that i was refering to.







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post #8 of 15 Old 10-25-2004, 06:09 PM Thread Starter
 
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Hey.. awesome thanks, that clears it up... p.s i hope ya didn't have to remove that off your car for the photo shoot ..lol
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post #9 of 15 Old 10-25-2004, 06:22 PM
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LOL, no i have a 65mm on my Cobra, that was the stock one laying in my garage. I was about to go outside to take the pictures when i remembered that i had the stock one hidden somewhere in the mess that is my garage...LOL



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post #10 of 15 Old 10-25-2004, 07:09 PM Thread Starter
 
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You know you may have some hidden treasures in that garage, you arn't aware of lol.. and btw do you have a picture of your cobra to show, would be interested to see it. 8)
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