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1997 Ford Mustang engine won't start

Tiny
YKKRS
  • MEMBER
  • 1997 FORD MUSTANG
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 85,850 MILES
I just replaced my speedometer on my 1997 mustang, and now it won't start. The theft light keeps flashing. Someone please help.
Friday, June 4th, 2010 AT 10:31 PM

14 Replies

Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
We answer thousands of questions everyday so Im sorry you feel we are unresponsive

When you say you replaced the speedo, do you mean the entire gauge cluster assembly or just the speedo/tach assembly from the cluster? Is the engine cranking at all or getting no response from ignition switch?
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Monday, June 7th, 2010 AT 7:25 PM
Tiny
YKKRS
  • MEMBER
  • 11 POSTS
I just replaced the speedo/tach, cluster. It will crank but won't start.
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+1
Tuesday, June 8th, 2010 AT 12:56 AM
Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
If it's cranking then wouldn't have anything to do with speedo replacement I wouldn't think. Need to make sure fuel pump is coming on and fuel pressure is correct. If OK check spark plugs to ensure they are getting bright blue healthy spark
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Tuesday, June 8th, 2010 AT 3:05 PM
Tiny
YKKRS
  • MEMBER
  • 11 POSTS
How would the fuel pump make the theft light flash like crazy?
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Thursday, June 10th, 2010 AT 12:52 PM
Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Didn't notice the anti theft light flashing. First make sure fuses are good, especially the maxi fuses under hood. If OK, try using a different key. If that doesn't work than the original key may need reprogammed as well as the PATS system, that is the anti theft system Ford uses.
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Thursday, June 10th, 2010 AT 1:04 PM
Tiny
YKKRS
  • MEMBER
  • 11 POSTS
O.K. I got new keys-pats, reprogrammed keys and still won't start. This theft thingy is driving me crazy.
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Friday, June 11th, 2010 AT 4:28 PM
Tiny
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  • MECHANIC
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Pull the fuse to the theft system out and try cranking then
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Friday, June 11th, 2010 AT 5:52 PM
Tiny
YKKRS
  • MEMBER
  • 11 POSTS
You left out something during your reply. Pull the fuse and?
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Friday, June 11th, 2010 AT 6:15 PM
Tiny
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  • MECHANIC
  • 16,542 POSTS
Nope, it's all there on my screen? I posted pull the fuse to the anti theft system and then try cranking engine
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Friday, June 11th, 2010 AT 6:17 PM
Tiny
YKKRS
  • MEMBER
  • 11 POSTS
O.K. Tried that, it just cranks
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Friday, June 11th, 2010 AT 6:21 PM
Tiny
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  • MECHANIC
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If the key is good then the computer must be at fault. Best bet would just be having a diagnostic ran on the anti theft system at local shop
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Friday, June 11th, 2010 AT 7:16 PM
Tiny
YKKRS
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  • 11 POSTS
Is there a way to check a pats key if it's any good? By the way the nearest ford dealership is about three hundred miles from here.
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Saturday, June 12th, 2010 AT 4:23 PM
Tiny
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  • MECHANIC
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Any local locksmiths around? They could tell you if the key is good or not
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Tuesday, June 15th, 2010 AT 12:18 PM
Tiny
YKKRS
  • MEMBER
  • 11 POSTS
Unfortunately there are no locksmiths around here. This thing is driving me crazy, I tried a obd code reader, but it won't read anything.
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Tuesday, June 15th, 2010 AT 12:35 PM

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