Why does the engine start but stalls immediately?

Tiny
T.MCFADDEN
  • MEMBER
  • 2000 FORD BRONCO
  • 80,000 MILES
After replacing the timing chain, timing chain cover, and water pump and refilling the radiator and changing the oil just for good measure the engine will turn over but will after the initial spike in RPMs will stall immediately afterward. Playing with the throttle body valve after starting before it stalls it sounds like the timing is fine and isnt misfiring or anything like that. I have checked all of the vacuum lines from the intake to the throttle body (to include the line that goes to the throttle body but also goes to the water pump then into the passenger side of the cab through the engine compartment)
Sunday, October 2nd, 2011 AT 11:07 PM

4 Replies

Tiny
T.MCFADDEN
  • MEMBER
  • 3 POSTS
1990 not 2000
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Sunday, October 2nd, 2011 AT 11:08 PM
Tiny
RIVERMIKERAT
  • MECHANIC
  • 6,110 POSTS
Check the main fuel injection relay and fuse. Make sure the injectors are receiving power and ground signals. Check the vacuum at the main vacuum port on the intake. You should be able to rent or borrow a gauge from a store like Pep Boys or Autozone.
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Sunday, October 2nd, 2011 AT 11:49 PM
Tiny
T.MCFADDEN
  • MEMBER
  • 3 POSTS
When you say gauge do you mean a voltmeter or some other type of gauge for the vacuum system?
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Monday, October 3rd, 2011 AT 12:50 AM
Tiny
RIVERMIKERAT
  • MECHANIC
  • 6,110 POSTS
It's a vacuum gauge. There's 2 kinds. One which only checks vacuum and one with which you can check vacuum or draw a vacuum.
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Monday, October 3rd, 2011 AT 3:35 AM

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