• Mustang Forums
  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang Tech

strange miss, cant figure it out!

  • Thread starter Thread starter 98laseredgt
  • Start date Start date Nov 10, 2004
9

98laseredgt

New Member
Jul 16, 2004
122
0
0
indianapolis
Nov 10, 2004
#1
  • Nov 10, 2004
  • #1
for a while now my car has been missing out at low rpm and in between quick shifts under WOT at high rpm. i dont have mil elims. but i have an OR H pipe. could that be doing it? from the look of the plugs which i have changed a couple times, using copper plugs. gapped properly. the drivers bank is running lean while the pass. side seems to run fine. i think the car is fouling plugs on the drivers side from leaning out. but the plugs arent the only problem. the missing seems to get better with new plugs in it. but after a while gets worse. also after i have been WOT for a few seconds and let off then get back on it, it stumbles really bad, like a car on a 2-step rev limiter. does anyone have any idea what would cause the 2 banks to run differently. or know how i can get rid of the missing. thanks for any help.

nate
 

Turbo92PGT

Member
Feb 17, 2003
746
0
16
Auburn Washington
Nov 10, 2004
#2
  • Nov 10, 2004
  • #2
dude PLEASE tell me if youfigure out what causes this. Mine does exactly what you say. I've replaced the fuel filter, plugs, wires, and everything. It also gets the most horrible gas mileage ever lol. seriously its a ****in joke
 

RZ96GT

New Member
Sep 3, 2002
38
0
0
Shawnee, Kansas
Nov 10, 2004
#3
  • Nov 10, 2004
  • #3
hey dude i have a 96 and mine did the same thing. i changed the plug wires just bought the motorcraft stockers and it went away. the 4.6's have a problem with buring a tiny hole or two in the wire that cant be seen but if that hole is near somthing thats easier to send the spark to it will. electricity is lazy itll go the shortest route. another time my did it and it was the beginning of my fuel pump failing. plug wires are cheaper so i would try that.
 
9

98laseredgt

New Member
Jul 16, 2004
122
0
0
indianapolis
Nov 10, 2004
#4
  • Nov 10, 2004
  • #4
i guess i should have said i have new MSD superconductor wires (8.5mm) i used autolite 764's. and i replaced the fuel filter also. im starting to think it is fuel related, probably the pump and or injectors, since one side runs lean and one doesent.
 

paver1

Founding Member
Mar 27, 2000
330
0
0
HELL-The hottest part.
Nov 11, 2004
#5
  • Nov 11, 2004
  • #5
Check the wiring going into the coil packs and make sure the wires have not pulled out a little bit.......They sometimes pull out of the rubber connector even though it looks like it is connected properly inside the coil.......
 

BanginStang97GT

Founding Member
Sep 9, 2001
1,025
0
0
Jersey
Nov 11, 2004
#6
  • Nov 11, 2004
  • #6
Yes, I agree with taking a look at the coils. MSD makes them and they are decently priced.
 

crazynorwegian

20+ Year Stangneter
Nov 6, 2003
267
0
16
azusa, ca
Nov 11, 2004
#7
  • Nov 11, 2004
  • #7
my car use to do that all the time. i spent about 2 months trying to figure it out. changing out/cleaning the spark plugs where a temp fix. I also had a problem with the car not starting up right away, sometimes it would take up to 20 rotations till it started. I eventually changed the wires, it help some, but was not completely fixed, so I changed out the spark plugs again and the problem was fixed. even though the plugs I had in there were brand new, the bad wires made the plugs go bad very prematurely. another problem that may of contributed to the problem was a hole in the fuel line that was inside my tank. so I was also loosing fuel pressure.

heres a picture of the fuel line. it looks like it had been rubbing against something in the fuel tank, and wore a hole in it. I've never heard of this happening to anyone before, but I also know that 98gt's have a different fuel system from the rest of the years.
 
S

Sellout

New Member
Oct 31, 2004
43
0
0
Nov 11, 2004
#8
  • Nov 11, 2004
  • #8
My car started doing that after I cleaned out my engine bay. Water got down by the plugs and it would miss real bad at low rpm. So i just took the wires out and blow them all out. Works fine now.
 
J

jeff98gt

New Member
Nov 12, 2004
1
0
0
Nov 12, 2004
#9
  • Nov 12, 2004
  • #9
Is your CEL on?

How many miles?

EGR?
 
You must log in or register to reply here.

Similar threads

Door wire harnesses 1996 GT
  • Adizzle843
  • Feb 5, 2026
  • SN95 4.6L Mustang Tech
Replies
7
Views
356
SN95 4.6L Mustang Tech Feb 17, 2026
Adizzle843
M
Help! 2003 GT misfire when hot
  • Modular03
  • Feb 10, 2026
  • SN95 4.6L Mustang Tech
Replies
4
Views
387
SN95 4.6L Mustang Tech Feb 13, 2026
Mustang5L5
T
Engine Need help figuring out misfire and backfire
  • trystancounts
  • Sep 25, 2025
  • Fox 5.0 Mustang Tech
Replies
8
Views
287
Fox 5.0 Mustang Tech Sep 26, 2025
Noobz347
B
Electrical Why does my fox body keep frying eecs
  • brandyn200
  • Jun 20, 2026
  • Fox 5.0 Mustang Tech
Replies
8
Views
243
Fox 5.0 Mustang Tech Jun 25, 2026
AeroCoupe
F
Trouble Shooting Sudden Shift of AFR at low RPM
  • Farva_84
  • Jun 6, 2025
  • SN95 4.6L Mustang Tech
Replies
8
Views
487
SN95 4.6L Mustang Tech Jun 8, 2025
Farva_84
F
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?