what would cause this???
03-14-2010, 03:05 AM
#1
4th Gear Member
Thread Starter
Join Date: Nov 2007
Location: Orange, California
Posts: 1,454
what would cause this???
well, i got in my mustang to take my girlfriend home, and as i was pulling out of my driveway i depressed my clutch and the mustang shuttered as if it were about to stall, only for about 1 sec. then i get to the first stop sign, and same thing, as im slowing down to a stop around 5mph i went from 2nd back to 1st, and again it shuttered as if it would stall. it did this for another 2 stop signs where i would slow down and downshift to first and it would shutter. when i got onto the main street it seemed fine, after on the road for about 5 min i came to a traffic light where i stopped. i was just talking to my girlfriend and glanced at my Rpm's... the needle was flat 0rpms, then i noticed i didnt feel the vibration in the pedals or stick, the engine died on me. i turned the key off and back on, and it started up fine. it was weird cause i didnt stall it, it didnt lurch foreward, and the battery was fine cause the radio and lights were on the whole time. i dont know what happened, i proceded to take my girlfriend home with no problems, which was about 17 miles, but when i got back to my house's area it began to shutter again when slowing and downshifting. what could this be? any ideas would help.
03-14-2010, 06:35 AM
#2
4th Gear Member
Join Date: May 2007
Location: Pacific Northwest, USA
Posts: 1,691
It sounds like your RPM's are dropping to far, when was the last time you pulled and cleaned the TB and MAF sensor? Also check your intake make sure you dont have any leaks, mine did something similar and I had found a piece on my intake had come loose. If your not getting a CEL then these are the first things I'd check.
03-14-2010, 10:13 AM
#4
3rd Gear Member
Join Date: Jan 2008
Location: NC
Posts: 903
^ what they said. It happened to me once when I still had the stock airbox. I looked under it and don't know how, but one of my rags was stuck in the little round hole at the bottom of the airbox blocking the air flow. Took it off and it was fine.
Oh, and why do you downshift to 1st gear ? I never went that low. the lowest I downshift to is 2nd gear. never felt the need to slow down that vioently or hear my exhaust sputter.
Oh, and why do you downshift to 1st gear ? I never went that low. the lowest I downshift to is 2nd gear. never felt the need to slow down that vioently or hear my exhaust sputter.
Last edited by eddypython; 03-14-2010 at 10:15 AM.
03-17-2010, 12:42 AM
#6
4th Gear Member
Thread Starter
Join Date: Nov 2007
Location: Orange, California
Posts: 1,454
i pulled my airbox, looked through it and seemed fine, no obstructions, after i reinstalled the airbox it wouldnt settle on an idle for about 5 min. it would be at 1k and slowly drop to 500 then quickly raise back to 1k as if i taped the gas. it seems fine now though, but im still closely watching the RPM's. how do i clean the MAF? and TB, i heard our TB's are sensitive so im not sure if i really want to touch it.
and as for why i shift down? i normally dont on flatter areas, but i live in a hilly area and my V6 engine needs the extra umpff to push these 20's up the hill.
and as for why i shift down? i normally dont on flatter areas, but i live in a hilly area and my V6 engine needs the extra umpff to push these 20's up the hill.
03-17-2010, 02:16 AM
#7
5th Gear Member
Join Date: Feb 2007
Location: Hawaii
Posts: 2,211
don't worry about the downshifting...I always do it. Only time I don't is when I have to suddenly stop. the trick is blipping the throttle to where motor rpm's are roughly where they would be once the car is in the next lower gear. not many people get taught that little trick.
as for the sputtering and weird rpm changes...clean that MAF out. simply unbolt it, and be very careful with the wiring. I used alcohol cleaner...there are products specifically out there for TB cleaning..but I wasn't in the mood to go find it. So rubbing alcohol did the trick for me.
it's usually the simplest answer to a problem. hope that is your issue
as for the sputtering and weird rpm changes...clean that MAF out. simply unbolt it, and be very careful with the wiring. I used alcohol cleaner...there are products specifically out there for TB cleaning..but I wasn't in the mood to go find it. So rubbing alcohol did the trick for me.
it's usually the simplest answer to a problem. hope that is your issue
03-17-2010, 05:35 AM
#8
4th Gear Member
Join Date: May 2007
Location: Pacific Northwest, USA
Posts: 1,691
i pulled my airbox, looked through it and seemed fine, no obstructions, after i reinstalled the airbox it wouldnt settle on an idle for about 5 min. it would be at 1k and slowly drop to 500 then quickly raise back to 1k as if i taped the gas. it seems fine now though, but im still closely watching the RPM's. how do i clean the MAF? and TB, i heard our TB's are sensitive so im not sure if i really want to touch it.
and as for why i shift down? i normally dont on flatter areas, but i live in a hilly area and my V6 engine needs the extra umpff to push these 20's up the hill.
and as for why i shift down? i normally dont on flatter areas, but i live in a hilly area and my V6 engine needs the extra umpff to push these 20's up the hill.
