Question about 1999 Ford Escort

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Idle is terrible untill it warms up.. rpm's rev high then low untill it warms

I have changed plugs and wires and valve cover gaskets as well. There is no longer oil leaking in the cylinders. It does sound like there is a vacuum leak which I can't locate. But, if the vacuum was causing the issue it should always run bad, (warm or cold).

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6ya6ya
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Posted on Jan 02, 2017

dgjtex
  • 405 Answers

SOURCE: 99 escort zx2 low idle and stalls after hi rpm, hi idle w/ fan on

Idle Air Control is the most likely problem, although there could be something else. But I would check that first on any ford with these symtoms.

Posted on Dec 28, 2008

michigan man
  • 3533 Answers

SOURCE: At startup my 94' F150 will oscillate from high to low idle

I had this problem once on an econoline van and it was the plantum gasket but before you change this check all the vacuum lines and get a digital volt meter and test the voltages on the mass air flow sensor and if you have to change the plantum gasket auto zone can print you out a diagram stating all you have to remove to replace it

Posted on Jan 09, 2009

csmock132
  • 4669 Answers

SOURCE: my truck idling low

What engine?

Posted on May 16, 2009

  • 1 Answer

SOURCE: oil on front spark plugs

I just had this problem with my 2002 Ford explorer. I took it to the shop and it was the valve cover gasket. This was causing some slippage and white smoke from exhaust.

Posted on Nov 25, 2009

wracefans24
  • 1985 Answers

SOURCE: 2000 ford super duty 7.3 diesel will not cold start

you need to have the engine coolant switch checked,since the computer relies solely on sensors,the ect tells the computer how cold or hot it is so the computer will make it a rich or lean mixture to start the engine,if it tells the computer that it is 75 degrees the computer will lean the mixture like starting a car in the winter without a choke.

Posted on Jan 06, 2010

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what year?
old posts, Im doing all Suz posts back to Jan1.2013
Ok this is called misfire.
misfire can happen at any speed or RPM even IDLE.
im sure you had the spark plug wires/ or COPS connected
wrong. and is fixed , now.

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