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

351w swap into 88 tbird. Issues

  • Thread starter Thread starter 86caprirs
  • Start date Start date Aug 6, 2010

86caprirs

New Member
Nov 24, 2001
17
0
1
Chestermere, Alberta
Aug 6, 2010
#1
  • Aug 6, 2010
  • #1
Hey guys.
I have a 1988 Thunderbird Sport that I swapped the stock 5.0L for a 351w F4TE roller engine. The bottom end is stock. I added a set of GT40 Y heads with bowl work, TF stage 1 cam, 1.7RR, Pro Products efi upper and 351w lower, 70mm TB,73mm C&L calibrated to 24lb injectors, 24lb injectors, A9L mass air swap,BBK 1 5/8 headers, offroad X pipe and a fenderwell mount CAI.

If the engine is cold it starts fine and runs a little rich...by smell. After driving for a bit, when I come to a stop, I get a idle that hunts really bad. It goes from 1800 to 200 rpm untill it stalls out. When I restart it will not idle but I can drive it. I have too keep my foot on the axcelorator to keep it running. This can also happen if I drive for a few min, shut off the engine then restart. It does not want to idle in gear or in neutral. What can I do about this problem?


Thanks
 

86caprirs

New Member
Nov 24, 2001
17
0
1
Chestermere, Alberta
Aug 8, 2010
#2
  • Aug 8, 2010
  • #2
Nobody hey?
 
You must log in or register to reply here.

Similar threads

M
01 mustang 3.8 fuel pressure issue
  • Mhaley2006
  • May 29, 2026
  • 1996 - 2004 SN95 Mustang -General/Talk-
Replies
0
Views
112
1996 - 2004 SN95 Mustang -General/Talk- May 29, 2026
Mhaley2006
M
Hard to start when engine is cold
  • 86_Capri
  • Mar 11, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 2
Replies
32
Views
943
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Jun 21, 2026
CAMTWO1070
X
VE Table Not Dialed? Send Me Your Datalog.
  • X-cam34
  • Feb 8, 2026
  • Digital Self-tuning Forum
  • 2 3
Replies
49
Views
1K
Digital Self-tuning Forum May 1, 2026
X-cam34
X
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
F
Resolved Stumble issue upon acceleration (1987 GT)
  • FoxDude87
  • Sep 16, 2024
  • Fox 5.0 Mustang Tech
  • 2 3
Replies
54
Views
3K
Fox 5.0 Mustang Tech Dec 3, 2024
FastDriver
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?