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

HELP! HELP! 96 COBRA Loss of Power At Hight RPM

  • Thread starter Thread starter SC'D_96_COBRA
  • Start date Start date Feb 22, 2009

SC'D_96_COBRA

New Member
Aug 10, 2008
14
0
0
Los Angeles,CA
Feb 22, 2009
#1
  • Feb 22, 2009
  • #1
I have a problem. Not really major but everytime I go WOT I lose power on the top end. The Tach seems to get stuck at High RPM's. Last time I posted this same problem and I replaced the spark plugs with NGK TR6 and the problem went away, but now the problem has returned. When the car is Idle I feel a light stutter here and there. Also, when I am at a Red Light, My gauge indicates that I a running rich. I have no issues when I drive normally. I ordered some new spark plugs to see if the helps and I should receive them tommorow. Does anybody else have any ideas on what the problem could be. Has anyone ever experienced this problem??
Also are there any 96 Cobra owners with a vortech at 8 psi? What spark plug and what gap should I use? I currently have mines gapped at .35 NGK TR6.

All suggestions would be really appreciated.
 
D

Dragstr05

New Member
Dec 21, 2004
643
1
0
Stafford VA
Feb 22, 2009
#2
  • Feb 22, 2009
  • #2
I'm assuming you have an A/F guage, what does it read when the problem occurs?

Also have you pulled the plugs? Is it missing? Worked on a lightning a while back; ran ok at idle and normal driving, but get on it hard and it ran like ****. Pulled the plugs, and 2 or 3 of them the electrodes were completely worn away.
 

EPIK

Member
Jul 3, 2004
796
1
16
LEFT COAST
Feb 22, 2009
#3
  • Feb 22, 2009
  • #3
Contact SVT32VDOHC... He has about the same setup as you & might be able to help you out... Send him a PM...

Here is a link to one of his threads...


http://forums.stangnet.com/777358-96-cobra-burnout-video-2006-old-find-lol.html
 

blackfang

Founding Member
Dec 17, 2001
1,290
1
39
Richmond, Va
Feb 23, 2009
#4
  • Feb 23, 2009
  • #4
SC'D_96_COBRA said:
I have a problem. Not really major but everytime I go WOT I lose power on the top end. The Tach seems to get stuck at High RPM's. Last time I posted this same problem and I replaced the spark plugs with NGK TR6 and the problem went away, but now the problem has returned. When the car is Idle I feel a light stutter here and there. Also, when I am at a Red Light, My gauge indicates that I a running rich. I have no issues when I drive normally. I ordered some new spark plugs to see if the helps and I should receive them tommorow. Does anybody else have any ideas on what the problem could be. Has anyone ever experienced this problem??
Also are there any 96 Cobra owners with a vortech at 8 psi? What spark plug and what gap should I use? I currently have mines gapped at .35 NGK TR6.

All suggestions would be really appreciated.
Click to expand...


Try gapping them at .035 and see what that does.

Also have you checked the wires for any arcing? What about the A/F sensors(what are they reading?) and is the MAF clean?
 

NO BRAKES

New Member
Feb 8, 2006
129
0
0
Avon Lake, Ohio
Feb 23, 2009
#5
  • Feb 23, 2009
  • #5
are you running a stock ecu? has the car been tuned?
 

SC'D_96_COBRA

New Member
Aug 10, 2008
14
0
0
Los Angeles,CA
Feb 25, 2009
#6
  • Feb 25, 2009
  • #6
Most of the time at Idle it always stays at 14.9-15.0 but sometimes especially when I stop at a red light, it goes to lean to 20.0 or sometimes it goes rich like in the 13's but it is rare. Sorry about the typo I do run my spark plugs at 0.030. What needs to be cleaned on the MAF? How do I clean it?

When you say arching do you mean removing one of the spark plug wires from its cylinder?

The owner of the car said it had a superchips chip and it was tuned but I forgot to get all the data sheets from him.
 
You must log in or register to reply here.

Similar threads

M
Help! 2003 GT misfire when hot
  • Modular03
  • Feb 10, 2026
  • SN95 4.6L Mustang Tech
Replies
4
Views
413
SN95 4.6L Mustang Tech Feb 13, 2026
Mustang5L5
P
2000 GT Random Power Loss
  • Pinellas50
  • Mar 9, 2026
  • SN95 4.6L Mustang Tech
Replies
4
Views
314
SN95 4.6L Mustang Tech Mar 23, 2026
Pinellas50
P
A
1987 5.0 speed density Foxbody crank no start
  • Alan2204
  • May 23, 2026
  • Fox 5.0 Mustang Tech
Replies
10
Views
318
Fox 5.0 Mustang Tech May 30, 2026
Mcmahst
I
98 Mustang GT dying
  • ItsMason
  • May 14, 2026
  • 1996 - 2004 SN95 Mustang -General/Talk-
Replies
3
Views
137
1996 - 2004 SN95 Mustang -General/Talk- Jun 25, 2026
lenzgt
L
96 GT 4.6 w/ dirty spark plug well
  • Mustang Momma
  • Apr 7, 2026
  • 1996 - 2004 SN95 Mustang -General/Talk-
Replies
3
Views
133
1996 - 2004 SN95 Mustang -General/Talk- Apr 9, 2026
LILCBRA
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?