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

Car didn't start this morning, but did this afternoon

  • Thread starter Thread starter 66 Tiger
  • Start date Start date Dec 12, 2003

66 Tiger

New Member
Jul 13, 2003
249
0
0
Virginia
Dec 12, 2003
#1
  • Dec 12, 2003
  • #1
Well as mentioned, my 90 5-liter LX would not start this morning. Temp was around 50 degrees ( cold for South Fl ) & when I hit the starter it would just crank. Not even a hint of it wanting to start. I checked the coil wires & the fuel pump seemed to be running. Anyway, when I got home this afternoon I decided to try the starter and it fired right up? Does anyone know if there is a choke or some sensor that would prevent the car from starting in cooler weather if it were faulty? It seems to run really rich too, if that makes any diff. I just got the car a couple of weeks ago so I don't know if this is mabey some re-occuring prob that the car has.
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,260
17,945
224
Massachusetts
Dec 12, 2003
#2
  • Dec 12, 2003
  • #2
86QtrHorse said:
Temp was around 50

Does anyone know if there is a choke or some sensor that would prevent the car from starting in cooler weather if it were faulty?
Click to expand...


Woah 50 is cold weather? If it hits 50 here i'm gonna take the sunroof off and cruise around in a t-shirt!


Just messing. I was having problems starting mine the other week..but the temps were around 0-10 degrees.

There are sensors that would prevent it from starting if it gets cold, but your best bet would be to check the check engine codes. No light doesn't necessarily mean no engine codes. Also, since it is a new car to you, you may want to do a complete tune up no matter what the previos owner did. This would include a oil change, spark plugs (stay away from platnium) spark plug wires, PCV, fuel filter, air filter, check timing, reset the TPS to 0.95 volts and clean the IAC and perform the idle reset procedure.
 

GT40XStang9

Thanks to Tim, I get off pretty easy.
Founding Member
Feb 26, 2001
25
33
89
Scotland UK
Dec 12, 2003
#3
  • Dec 12, 2003
  • #3
That happens to me every so often when it gets cold outside, but my problem is the fuel pump relay. Are you sure you were hearing the pump prime?
 

66 Tiger

New Member
Jul 13, 2003
249
0
0
Virginia
Dec 12, 2003
#4
  • Dec 12, 2003
  • #4
Thanks Mustang5L5.... I just replaced the fuel tank & filter. ( tank was leaking ) I'll try the other stuff you advised as well. I also suspect the timing is off due to the car running rich & the absence of lower rpm power.
Also, how do I check codes? Is there something I can purchase or do I need to take it to a shop? ( i'd rather not! )
 

66 Tiger

New Member
Jul 13, 2003
249
0
0
Virginia
Dec 12, 2003
#5
  • Dec 12, 2003
  • #5
GT40XStang9 said:
That happens to me every so often when it gets cold outside, but my problem is the fuel pump relay. Are you sure you were hearing the pump prime?
Click to expand...

I can't swear I heard the pump prime this morning, but it definatley did this afternoon. Where is the fuel pump relay located at?
 

Notchbck93

New Member
Dec 9, 2003
422
1
0
IL
Dec 12, 2003
#6
  • Dec 12, 2003
  • #6
Under your bum. ITs under the drivers seat , cept for 93's
 
You must log in or register to reply here.

Similar threads

B
Engine Another no start after washing engine bay
  • bruno
  • Apr 26, 2026
  • Fox 5.0 Mustang Tech
  • 2
Replies
24
Views
733
Fox 5.0 Mustang Tech May 7, 2026
AeroCoupe
8
Electrical Crank-no start ... no spark ... no injector pulse, was it something I did? (redux)
  • 85gtCOBRA
  • Oct 28, 2025
  • Fox 5.0 Mustang Tech
Replies
2
Views
577
Fox 5.0 Mustang Tech Oct 29, 2025
85gtCOBRA
8
B
Electrical Why does my fox body keep frying eecs
  • brandyn200
  • Jun 20, 2026
  • Fox 5.0 Mustang Tech
Replies
8
Views
274
Fox 5.0 Mustang Tech Jun 25, 2026
AeroCoupe
Resolved 93 Mustang 5.0 - Cranks but does not start
  • dan50
  • Jul 18, 2026
  • Fox 5.0 Mustang Tech
Replies
6
Views
151
Fox 5.0 Mustang Tech Jul 18, 2026
dan50
Alternator not charging
  • SchwarzStock
  • Jul 6, 2026
  • 1965 - 1973 Classic Mustangs -General/Talk-
Replies
2
Views
89
1965 - 1973 Classic Mustangs -General/Talk- Jul 19, 2026
SchwarzStock
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?