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

idle problems!!

  • Thread starter Thread starter jnobles06
  • Start date Start date Oct 12, 2004

jnobles06

Member
Oct 23, 2003
85
0
6
Clovis,NM
Oct 12, 2004
#1
  • Oct 12, 2004
  • #1
the car normally idles at like 1000 rpm's but here lately hit will hit like about 1400 and then drop back down. i will also do it on the highway. ill be driving and it will jump up about 300 rpm's out of know where. thanks or your time guys.
 

HISSIN50

"How long does it take to get help in here?
15 Year Member
Nov 29, 1999
31,179
33
129
Oct 12, 2004
#2
  • Oct 12, 2004
  • #2
pulled codes?
i would look for a vac leak. good luck.
 

jnobles06

Member
Oct 23, 2003
85
0
6
Clovis,NM
Oct 13, 2004
#3
  • Oct 13, 2004
  • #3
no check engine light.....no codes
 

jnobles06

Member
Oct 23, 2003
85
0
6
Clovis,NM
Oct 13, 2004
#4
  • Oct 13, 2004
  • #4
this is a 91 5.0 by the way....not the 351w that i have in my signature
 

281pony

Active Member
Aug 31, 2003
2,681
2
46
Oly, WA
Oct 13, 2004
#5
  • Oct 13, 2004
  • #5
done the usual checks and cleaning?

tps, iac, vac lines, mass air sensor, ect?
 
You must log in or register to reply here.

Similar threads

7
Engine Random hanging idle
  • 706 Saleen
  • Feb 11, 2026
  • Fox 5.0 Mustang Tech
Replies
9
Views
421
Fox 5.0 Mustang Tech Feb 19, 2026
86HO5.0
8
J
Engine Running like crap :(
  • justadude07
  • Sep 27, 2025
  • Fox 5.0 Mustang Tech
Replies
8
Views
309
Fox 5.0 Mustang Tech Oct 19, 2025
DadLife0724
Engine Surging idle on start-up
  • keel
  • Aug 11, 2025
  • Fox 5.0 Mustang Tech
Replies
16
Views
739
Fox 5.0 Mustang Tech Oct 31, 2025
keel
9
Electrical F150 ECU in a Foxbody? Idle surge help
  • 93royalblue
  • Sep 10, 2025
  • Fox 5.0 Mustang Tech
Replies
6
Views
376
Fox 5.0 Mustang Tech Sep 17, 2025
Mustang5L5
S
Engine Stalls when downshifting/coasting
  • Scott_S
  • Nov 5, 2025
  • Fox 5.0 Mustang Tech
Replies
11
Views
635
Fox 5.0 Mustang Tech Nov 6, 2025
Mustang5L5
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?