• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 1994 - 1995 Specific Tech

Help, why is my engine knocking?

  • Thread starter Thread starter JimTMich
  • Start date Start date Nov 11, 2003
Prev
  • 1
  • 2
  • 3
First Prev 3 of 3
J

JimTMich

Member
Mar 20, 2003
161
0
16
Michigan
Feb 3, 2004
#41
  • Feb 3, 2004
  • #41
Still Knocking

Well, I set the timing to 10 degrees with the sprout connector removed, engine warm. I ran 87 octane through for 2 tanks and it's knocking like crazy on 0F degree days.

Haven't got it yet.
 

95GTvert[bv12]

Founding Member
Apr 1, 2001
1,792
0
37
Lake Tahoe, NV
Feb 3, 2004
#42
  • Feb 3, 2004
  • #42
did you try replacing the sensors yet? also try using 89 octane...but you should be able to run 87 octane with 10* base line
 

Joes95GT

New Member
Jan 23, 2003
3,132
1
0
Delaware
Feb 3, 2004
#43
  • Feb 3, 2004
  • #43
JimTMich said:
Well, I set the timing to 10 degrees with the sprout connector removed, engine warm. I ran 87 octane through for 2 tanks and it's knocking like crazy on 0F degree days.

Haven't got it yet.
Click to expand...
From what I've found, winter gas is more oxygenated which isn't going to help the pinging at all. Todays 87 is just a step above Propane. Don't run that trash. Don't throw in a whole tank of 93, but just try maybe 1/4 a tank and see if it works first before you fill her up.

Joe
 
J

JimTMich

Member
Mar 20, 2003
161
0
16
Michigan
Feb 3, 2004
#44
  • Feb 3, 2004
  • #44
95GTvert[bv12] said:
did you try replacing the sensors yet? also try using 89 octane...but you should be able to run 87 octane with 10* base line
Click to expand...

I replaced ECT, AIT, and cleaned the Maf.


From what I've found, winter gas is more oxygenated which isn't going to help the pinging at all. Todays 87 is just a step above Propane. Don't run that trash. Don't throw in a whole tank of 93, but just try maybe 1/4 a tank and see if it works first before you fill her up.

Joe
Click to expand...

I put in 10 gallons of 93 and the knocking went away.

Do I just have to live with more octane.

BTW, Over the years I have found that running 93 I get about 20% better mileage. Which pays for the 93 octane. I'll have to keep my eye on it now that I have made changes.
 
Prev
  • 1
  • 2
  • 3
First Prev 3 of 3
You must log in or register to reply here.

Similar threads

B
Where to go from here on my build…
  • B0udreaux
  • Jul 14, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
8
Views
248
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Jul 18, 2026
AeroCoupe
Resolved 93 Mustang 5.0 - Cranks but does not start
  • dan50
  • Jul 18, 2026
  • Fox 5.0 Mustang Tech
Replies
6
Views
243
Fox 5.0 Mustang Tech Jul 18, 2026
dan50
Engine 1990 LX 5.0L EFI Mustang Fuel Management Problems - HELP!
  • 5.0LXStanger
  • May 25, 2025
  • Fox 5.0 Mustang Tech
  • 2 3
Replies
45
Views
2K
Fox 5.0 Mustang Tech Jul 11, 2025
5.0LXStanger
E
Finished my Fox Hydroboost Install - Tips
  • Engineer Duane
  • Apr 9, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
4
Views
1K
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- May 5, 2025
Engineer Duane
E
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
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 1994 - 1995 Specific 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?