Question about 1999 Lincoln Continental

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I have a 1999 Lincoln Continental and lightly stumbles on acceler

I have a 1999 Lincoln Continental and it stumbles and or hesitates on light acceleration. I have replaced the Fuel Filter, Air filter and PCV valve, sparkplugs and boots and that didn’t help. At WOT it takes off like a rocket. Its only during light acceleration. Engine runs smooth at idle. No fault codes, gets good gas mileage. If anyone knows what’s wrong please let me know. Thanks,
Bob

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  • Lincoln Master
  • 11,020 Answers

Could be caused by a few different thing's ,dirty mass air flow sensor ( if your vehicle has one ) A worn TPS - throttle position sensor , dirty throttle plate .

Posted on Aug 01, 2017

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6ya6ya
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Posted on Jan 02, 2017

  • 9 Answers

SOURCE: I have a 1994 Chev. S-10 pup 4.3L ''W''engine....stumble on accel.

check your egr valve....

Posted on Apr 07, 2009

greg_margo
  • 1959 Answers

SOURCE: 2005 Lincoln LS hesitation at low acceleration speeds

It could be a couple of issues:

  1. Since you mention 30mph a speed when the transmission wouild normally shift into 3rd, and again at high speed (you didnt' mention MPH) where it would possibly shift again, it's possible that the transmission is slipping. Check the fluid or better yet, if it's got around 50-60K on it, have the fluid and filter changed.
  2. Another cause could very well be fuel related, be it a filter, fuel sending unit, or the pump itself
I'd start with the transmission fluid. Check it and if the color is starting to brown, or gives a slight burning smell, have it changed along with the filter. If it's just low, then that definitely would cause the transmission to slip.
Best of luck and post back with any other concerns.
Greg

Posted on Jun 11, 2009

MechxD
  • 87 Answers

SOURCE: 1997 Lincoln town car acceleration problem..

Hey Bill, To answer your question about injectors, without a scanner capable of performing a injector balance test its very difficult to narrow down a clogging injector, you could however get a injection cleaning done at the shop of your choice, or even try a fuel additive to pour into fuel tank, however based upon the work you already have done, and the drive-ability your experiencing I would say you have a bad upstream O2 sensor. Bank 2 should be passenger side next to exhaust manifold. If you have access to a scanner you could check the O2 switching, however, I think that's your problem. Fuel pressure would cause both banks lean, vac leaks would really affect idle, and a ignition problem would usually set a misfire code. One thing you could try however which i have had success with is cleaning your mass air flow sensor, auto part store stock it, very easy to perform, i have had luck with it in the past, if dirty it can throw fuel trims out of spec. If you need any thing else let me know, and make sure you let engine cool for a period of time before touching any exhaust areas.

Posted on May 07, 2011

Testimonial: "Hi Mechxd Thanks for your input,you have answered my question and given me a new approach to the problem . I will pursue those issues. Thanks Bill"

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