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

Engine 86 Mustang GT 5.0 V8 Start Up RPM

  • Thread starter Thread starter buckingpony
  • Start date Start date Aug 5, 2020
B

buckingpony

New Member
Jul 20, 2020
5
0
1
United States
Aug 5, 2020
#1
  • Aug 5, 2020
  • #1
When I start my car I've noticed that the RPM will go to about 1500-1700 and hold for a few seconds before dropping down to 900-1000 RPM...Is this normal or is my IAC bugging out?
 
You must log in or register to reply here.

Similar threads

A
1987 5.0 speed density Foxbody crank no start
  • Alan2204
  • May 23, 2026
  • Fox 5.0 Mustang Tech
Replies
10
Views
455
Fox 5.0 Mustang Tech May 30, 2026
Mcmahst
8
Foxbody high rpms and surging rpms
  • 86foxseth
  • Jun 9, 2026
  • Fox 5.0 Mustang Tech
Replies
4
Views
273
Fox 5.0 Mustang Tech Jun 13, 2026
Noobz347
Engine Surging idle on start-up
  • keel
  • Aug 11, 2025
  • Fox 5.0 Mustang Tech
Replies
16
Views
1K
Fox 5.0 Mustang Tech Oct 31, 2025
keel
G
Resolved Smoking Wiring Issue After GT40 Head Swap
  • Grapes
  • Aug 15, 2026
  • Fox 5.0 Mustang Tech
Replies
17
Views
459
Fox 5.0 Mustang Tech Aug 22, 2026
Grapes
G
C
Engine Idle cuts out
  • claypoolxx
  • Mar 7, 2026
  • Fox 5.0 Mustang Tech
  • 2
Replies
25
Views
1K
Fox 5.0 Mustang Tech Jul 24, 2026
alutwon
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?