| Home | Register | FAQ | Members List | Calendar | Blogs | Garage | Gallery | Search | Today's Posts | Mark Forums Read |
| | |||||||||||
| ||||||||||||
|
|||||||
Discussing car breaking uptop in the 4V / SVT Forum. its been a week since i purchased 03 cobra it was stock except for k&... Modded Mustangs is the premier Ford Mustang Forum on the internet. We discuss all aspects of the Ford Mustang on the forum. Registered Users do not see the above ads. Please Register - It's Free! |
|
|
LinkBack | Thread Tools |
September 1st, 2008, 02:17 AM
|
#1 |
|
Regular
Join Date: Aug 2008
Posts: 244
|
car breaking uptop
its been a week since i purchased 03 cobra it was stock except for k&n intake, added bassani cat-back, 2-80 pulley, diablo predator tuner, everytime i gu it and gets to 5k rpm's it starts to like buck, hesitates, could it be the plugs, any help appreciate it
|
| Sponsored Links | Remove Advertisements |
| Forums at Modded Mustangs Advertisement |
|
|
September 1st, 2008, 03:31 AM
|
#2 |
|
N/A 4v Guru
2003 Mach 1
Join Date: Oct 2007
Location: N.W. Arkansas
Posts: 3,039
|
could be a couple things, plugs, tune, etc. need a little more info on what exactly its doin. who did the tune?
__________________
 Gone To Basic Training |
|
September 1st, 2008, 04:45 AM
|
#3 |
|
Regular
Join Date: Aug 2008
Posts: 244
|
thundersports auto here in south florida, he said it could be the plugs, i think thats a possibility since all the new added parts and hp they prob need to be regapped i just dont know wht gap to run, even though b4 doing the mods the car had a slight miss, oh and now if i brake hard sometimes the car will shut off
|
|
September 1st, 2008, 04:48 AM
|
#4 |
|
Regular
Join Date: Aug 2008
Posts: 244
|
when i go about 46ish to 5k rpm's the car breaks up and then kinda catches on but i can notice there isn't much power after that maybe its the Heaton since the car has 78k miles n the clock
|
|
September 1st, 2008, 01:06 PM
|
#5 |
|
N/A 4v Guru
2003 Mach 1
Join Date: Oct 2007
Location: N.W. Arkansas
Posts: 3,039
|
I would change the fuel filter and see if that helps. then if it still does it then change the plugs out.
__________________
Gone To Basic Training |
|
September 1st, 2008, 01:26 PM
|
#6 | |
|
Hardcore Enthusiast
1998 SVT Cobra
Join Date: Jan 2007
Location: Santa Rosa, CA
Posts: 1,635
|
you did all those mods when you knew the car had a miss?
__________________
*The Sacred Chao says "MU"* Real racers turn corners... both ways... on the same track. MM Corner Carvers Crew, member #2 |
|
|
September 1st, 2008, 01:32 PM
|
#7 |
|
Newbie
Join Date: Aug 2008
Posts: 22
|
I had the same problem when I would let off the gas at over 30mph it would go off on me,I reset the pcm and hasn't done it since.I'm not sure about the 5k thing it might be the tune but if it has 78k and yopu just got it I would change the plugs first+fuel filter.
|
|
September 1st, 2008, 06:15 PM
|
#8 |
|
Regular
Join Date: Aug 2008
Posts: 244
|
the motorcraft plugs were gap'd at 47
|
|
September 1st, 2008, 09:46 PM
|
#9 |
|
Hardcore Enthusiast
03 Mach 1--~--1 of 2513
8.9 1/8 mile time
Join Date: Apr 2007
Location: Alcoa/Knoxville, Tn
Posts: 1,554
|
why dont you datalog the tune and let the guy check it out. maybe its leaning out? or something gay like that
regardless datalog might help you find the problem area
__________________
 Originally Posted by HMUSN it's like racing a mach 1 .. not untouchable but still gonna lose plain and simple no matter how you roll the dice. SaleenWolf720: need horsepower?? no, you just need bald tires, then you'll really feel the power |
|
September 1st, 2008, 09:51 PM
|
#10 |
|
Regular
91 mustang lx coupe
way too slow
Join Date: Aug 2008
Location: Denton Tx
Posts: 147
|
true true... almost sounds like a vacuum leak to me though... no lean codes? try a koer self test, see if it pulls any codes... check your 02 readings while spraying carb cleaner around the intake... and try the datalogging thing, see if it fattens up or leans out.. that will point you in the right direction.. any fuel issue will lean up and a spark issue, it'll run rich up top...
|
|
September 2nd, 2008, 09:30 AM
|
#11 |
|
Regular
04 mustang cobra
Join Date: Jun 2008
Location: sioux city, iowa
Posts: 131
|
maybe you need to get a colder plug with the proper gap since you are making more boost, fuel filter or bad gas
__________________
If you cant hear the whine, then your behind  Mods: solid axle with 3.73's, MGW shifter, bassani cat-back, afco heat exchanger, k&n fipk, C&L intake tube, accufab throttle body with s.c. inlet, 2.76 upper pulley, 90 mm aux idler pulley, sct tuner |
 |
| Thread Tools | |
|
|
Threads Similar to: car breaking uptop
|
||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| Breaking Out! (car show) | jdansby1 | Pictures | 37 | May 29th, 2008 05:57 PM |
| Breaking Out! (car show) | jdansby1 | The Clubhouse | 0 | March 2nd, 2008 07:44 PM |
| Alls I Want For Christmas Is To Run My Car Without Breaking! | sonicblue | The Clubhouse | 17 | December 20th, 2007 07:33 PM |
| Breaking News! (Car Show) | WAVEBYE | Modular Mustangs | 2 | October 7th, 2006 11:54 AM |
| Hi Guys I Want To Keep My Car Colder Without Breaking Bank | jagstang96 | 96-98 | 6 | October 6th, 2006 11:59 PM |
