1999 Mercury Marquis Car runs rough

1999 MERCURY MARQUIS
83,400 MILES • V8 • 2WD • AUTOMATIC
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JOHNALLEN1984
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  • 2 POSTS
I just replaced my intake manifold and plugs after my old intake manifold cracked, it starts up fine but idles kinda shaky, and when i put into drive it goes to a real low idle and almost dies but in park it idles better?
Apr 14, 2009 at 7:25 PM
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BMRFIXIT
  • ✓Experienced Mechanic
  • 19,053 POSTS
Recheck your work
check for vacuum leaks
check firing order and wires


need manual CHECK IT @
https://www.2carpros.com/kpages/auto_repair_manuals.htm
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Apr 14, 2009 at 10:38 PM
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JOHNALLEN1984
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  • 2 POSTS
The firing order goes in oder 1-8 but also my 1999 mercury has the plugs on top of the head with those individual plugs are they numbered? Because i didnt mark those where they went back?
Apr 15, 2009 at 4:49 PM
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BMRFIXIT
  • ✓Experienced Mechanic
  • 19,053 POSTS
If you have a coil per cylinder you should be OK
if not firing order should go like this 1-3-7-2-6-5-4-8
Apr 15, 2009 at 11:54 PM
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