99 Winstar, Miss at low speed

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- Charlie East
  
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posted
18 years ago

Thu, Jul 28, 2005 2:56 AM

Vehicle has 105,000 miles, Had service eng light for some time now, Codes showed bank one and bank two lean, Had the fuel filters replaced, same problem. Had the spark plugs replaced,( they really did need changing) . The service eng light came on the first time I drove it ten miles.It appears to miss or run rough at a slow speed (20 to 30 mph, does not happen all the time. When it does, I can increase the accelerator slightly and it smoothes out. Any ideas on this one,( I have not had the codes checked since replacing the plugs) Thanks Charlie snipped-for-privacy@bellsouth.net

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- Petebert
  
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posted
18 years ago

Thu, Jul 28, 2005 3:20 AM

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- Jeff
  
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posted
18 years ago

Fri, Jul 29, 2005 1:15 PM

You need to find out what is causing the service engine soon light to come on and fix that.

Jeff

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- Charlie East
  
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posted
18 years ago

Sun, Jul 31, 2005 4:03 AM

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- mmmgall
  
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posted
18 years ago

Tue, Aug 2, 2005 7:16 AM

I have same problem on my 99 Windstar. Codes 171 & 174. No other clues. Today I just happened to find that one of the control rods on the IMRC ( Intake Manifold Runner Control ) was off and just sitting there. This sits on the left side of the intake manifold (plenum) and in my model is one control unit with two control rods (arms) going forward and rearward to control the "butterfly valves". Haven't yet got to it but you might check yours. It might be the cause of the codes.