[96stangGT]

hey im new to this site so im hoping i can get some help. i just bought a 96 mustang GT and i was for some stupid reason changing the battery terminals. after i was done i took it out for a rip and it starts up fine everytime but as soon as i put it in reverse it stalls out, and when i put it in drive it either stalls or idles at like 300 RPM. it was perfectly fine and never did tht before i changed the terminals so i changed them back to the stock ones and it still did it???, any help or ideas to try would be great.
thanks

[Jonny00GT]

Change the fuel filter. Depending on the previous owner, it's probably never been done and it sounds like a fuel deliver problem that just came to a head the same time you were working on the battery.

Also double check the connections on the battery cables too though. If they are not on there tight, it'll studder.

Not sure how long you've owned it, but you may want to go ahead and take care of all the normal maintinence items like plug wires, plugs, trany oil, radiator coolant, etc. No telling if all that stuff was replaced/changed when it was supposed to be done.

-Jonny

[96stangGT]

hey thanks for the answer, i called around a couple places and they said it sounds like the idle got messed up in the computer so like it when i disconnected the battery it forgot wht to idle at sota say, so thanks for the help im going to change the fuel filter and plugs and wires and all the normal stuff i should have changed already

[Casper98GT]

yeah also check the IAC.... When you removed the terminals the PCM lost its learned values. So now its going to act a little different but doing that shouldnt havent allowed it to stall out.

[96stangGT]

hey i tried a few things out today, like putting lead free terminals on tht look just like the stock ones, and it didnt do much but i found out another thing, when the car is cold like when i first start it, its fine never stalls or anything in any gear, but as soon as it warms up it starts cutting out and dropping in RPM when i shift from park to reverse or park to drive???
any ideas lol
thanks

[Jonny00GT]

If you already changed the fuel filter, I'd say that sounds like the O2s. Once you're out of warm up mode, if the O2s are not switching fast enough or properly, you can get them maxing out rich and lean signals and that will play havvoc with the way your car runs for sure.

If you need to replace them, make sure you get Ford parts. Randy in the Ford Parts thread on modulardepot.com can hook you up with about the lowest prices I've found. Same for all sensetive electronics like the IAC...only use Ford Parts.

Hope you get it worked out!

-Jonny

[beheivjer]

any cels coming on? and i used denso o2 sensors and havent had any problems with them

[Jonny00GT]

Originally Posted by beheivjer any cels coming on? and i used denso o2 sensors and havent had any problems with them

Do what you like, but when the big boys pushing mas power who drag and autoX and know thier stuff tell me to use OEM, I listen. -Jonny

[beheivjer]

ford oe parts arent always made by ford. not every company has all there parts made in house most are made at companies and reboxed for who ever needs them.

[Casper98GT]

Any sensor i will NOT use anything but factory OEM parts.

[Jonny00GT]

Originally Posted by beheivjer ford oe parts arent always made by ford. not every company has all there parts made in house most are made at companies and reboxed for who ever needs them.

Not sure where you're going with this, but yes some parts are made by another company for Ford. The point is, when they make them for Ford, they are made to spec required by Ford. When they make them for Auto Zone or your local car parts dealer, they do not follow the identical spec Ford requires. Do some research on it and you'll see what I mean.

-Jonny

[AtlanticBlue99]

Originally Posted by 96stangGT hey i tried a few things out today, like putting lead free terminals on tht look just like the stock ones, and it didnt do much but i found out another thing, when the car is cold like when i first start it, its fine never stalls or anything in any gear, but as soon as it warms up it starts cutting out and dropping in RPM when i shift from park to reverse or park to drive??? any ideas lol thanks

is it an automatic transmission? sounds like a possible converter issue with stalling out when the engine is warm.

if not, it is an air/fuel problem.

[96stangGT]

hey thanks for all the input but wierdly enough i went out the next day and disconected the terminals again and reconected it and it runs fine, so i think it was something to with the compuiter loosing the memory i guess but im picking up a memory saver for the futur. thanks a lot guys