1998 Ford Taurus Engine Idle

Tiny
FERRARI2479
  • MEMBER
  • 1998 FORD TAURUS
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 222,000 MILES
OK so upon a cold start up my car shakes at idle and then takes a lot of gas to get the car going. Also when I'm sitting at stop lights in gear the cars rpms will go down to prob almost 500 rpm and almost stall and then come back up. No check engine light.
Saturday, July 24th, 2010 AT 8:41 PM

6 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 POSTS
It sounds like a vacuum leak. Have you checked for that? Also, have you checked fuel pump pressure?
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Saturday, July 24th, 2010 AT 11:46 PM
Tiny
FERRARI2479
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  • 6 POSTS
I havent tested for a vacuum leak because I cannot find a good diagram for the vacuum lines so I can check it with a guage.
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Sunday, July 25th, 2010 AT 1:24 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 POSTS
Yes, check the vacuum at the intake and let me know what you find. Also, let me know if the check engine light has come on.
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Monday, July 26th, 2010 AT 1:06 AM
Tiny
FERRARI2479
  • MEMBER
  • 6 POSTS
Ya I found two lines that come off the intake one goes to the oil cap and the other goes around can I just use that one. And can I just tap that line with a t fitting or can I just stick the gauge directly on the intake.
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Monday, July 26th, 2010 AT 11:25 AM
Tiny
FERRARI2479
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  • 6 POSTS
Ok so I took a vauum reading. I tapped a line the was coming off the intake. It was reading a steady 5 in hg. That seemed really low, implying a major intake leak so was wondering if I did something wrong or it might just really be that bad.
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Monday, July 26th, 2010 AT 4:45 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 POSTS
That is really low. Check the EGR, intake gasket and all vacuum hoses. If you can't find any, make sure the brake booster isn't leaking.

Let me know what you find.
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Monday, July 26th, 2010 AT 11:47 PM

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