• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech

sct chip

  • Thread starter Thread starter 93stang burden
  • Start date Start date May 3, 2010

93stang burden

Member
Dec 2, 2008
82
0
6
Fort Bragg, NC
May 3, 2010
#1
  • May 3, 2010
  • #1
ok heres the deal. i have a sct chip in my 93 stang witha 331, afr 185's, msd, 70mm tb, 73mm mass air, bbk x pipe, pullies, 30lb injectors, and alot of other stuff. I have spark knock from timing. I thought maybe it was gas but another tank of 93 from different gas station and the knock was still there. but if you pull the spout out of the distributor wherethe timing dosen't advance it will not have spark knock. i drove it a mile or so and took the rpms up to 5000 and nothing. it didn't make nearly enough power but no knock.

so can the sct chip be programmed to limited the total timing????

mine goes up to almost 40 degreees of total timing if yourev it up withe light on it. if it only went to say 30-32 degrees maybe i could get rid of this spark knock.
 

SMOKEDYA

20+ Year Stangneter
Jul 13, 2003
3,637
8
79
Tucson AZ
May 3, 2010
#2
  • May 3, 2010
  • #2
my tuner set my timming with mine i beleive? peace











john
 
P

phutch11

Member
Nov 14, 2005
328
2
18
May 3, 2010
#3
  • May 3, 2010
  • #3
Check your base timing. If it isn't at 10 degrees; put it there. Still knocking?

Then try 9. Still got knock?

Then try 8. Still got knock?

At some point this should cure your knock, but it may cause your idle to suffer, and part throttle cruise may have lower fuel economy.

Repeat...

Good Luck....
 

93stang burden

Member
Dec 2, 2008
82
0
6
Fort Bragg, NC
May 4, 2010
#4
  • May 4, 2010
  • #4
i tried the backing down to 6* with no luck as sson as you hit the gas it was there still. but if i pull ou the spout plug then it lacks power since there is no timing advacne but it doesn't knock. i got another computer off ebay. hopefully it will be here in a few days.
 

Cobra1741

Member
Mar 9, 2010
152
1
16
May 4, 2010
#5
  • May 4, 2010
  • #5
i believe the tuner should be able to set the initial and total timing. my tuner set the initial at 10 degrees and total timing around 38. yours hsould be the same, i dont see why youd have to go below 10* initial. see if you have any codes... egr not working properly?? or run a octane booster to clean out that carbon if theres any build up.
 

93stang burden

Member
Dec 2, 2008
82
0
6
Fort Bragg, NC
May 4, 2010
#6
  • May 4, 2010
  • #6
have code 15 and i have tried 2 differnet gas stations with 93 octane. still engine knock. its a brand new motor only a 100 miles on it so theres no carbon build up.
 
You must log in or register to reply here.

Similar threads

S
Engine Stalls when downshifting/coasting
  • Scott_S
  • Nov 5, 2025
  • Fox 5.0 Mustang Tech
Replies
11
Views
642
Fox 5.0 Mustang Tech Nov 6, 2025
Mustang5L5
W
Resolved Loss of Horsepower After Base Idle Reset??
  • WTW
  • Aug 12, 2023
  • Fox 5.0 Mustang Tech
Replies
8
Views
2K
Fox 5.0 Mustang Tech Aug 13, 2023
WTW
W
Progress Thread Giving an abandoned 88 GT project a new chance at life
  • jaketractor
  • Jan 9, 2025
  • Fox 5.0 Mustang Tech
  • 2
Replies
27
Views
2K
Fox 5.0 Mustang Tech Jul 20, 2025
Noobz347
1
94 GT HCI: Won't find /hold idle when Warm to Temp
  • 1994FiveO
  • Jun 10, 2023
  • 1994 - 1995 Specific Tech
Replies
2
Views
2K
1994 - 1995 Specific Tech Jun 14, 2023
1994FiveO
1
98 GT PI Swapped Engine Fires, Dies Immediately NOT PATS
  • MMccPerformance
  • Dec 2, 2023
  • SN95 4.6L Mustang Tech
Replies
3
Views
2K
SN95 4.6L Mustang Tech Dec 20, 2023
Yel2002GTAuto
Y
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 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?