Question about 1996 Ford Taurus

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96 FORD TAURUS IDLE PROBELEMS. When starting the car it revs up to 1500 or more then works down to 800 but flutuates up and down occasionally popping up to 1300 or so. while pulling up to stop sign or light the car will sometimes rev up causing the vehicle to lunge forward. the car has cut out 2 time while slowing down around 45_50mph without applying throttle but then kicked right back on. then pulling up to stop sign the car died but started right back up. shortly after tbat i took at aic valve off a.d eaned it. the car ran better for a week but the problem is coming back. also wbile stopped at a stop sign i kicked the heat decrost up and car revved up lunging forward. any suggestions would be great.

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6ya6ya
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Posted on Jan 02, 2017

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emissionwiz
  • 76848 Answers

SOURCE: Dies when idling, does better with a/c on, but still dies

this is your problem:

Here are the most common causes of surges, stalls at stops, low erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake

Posted on Apr 06, 2009

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  • 57 Answers

SOURCE: My 2002 Ford Taurus will shutter and die when

the idle air control valve is responsible for engine idle.
this is a common failure on ford's. but I don't think yours is bad because it does idle high befor it dies.
you stated you had codes p0171 and p0174 these are lean codes for bank one and two, you said you found a vacuum leak and repaired it, the vacuum leak was mostly likely the cause of the lean codes, however the pcm has calibrated the fueling stategy for this lean mixture, what you need to do is erase the KAM "keep alive memory" this is done by unhooking the negative battery cable for 60 seconds, this is the only way to erase the KAM the $6000.00 machine I use wont even do it.

once the KAM is clean the computer will go into a relearn state and all operating values will be adjusted for the vehicles current condition, during this relearn session the vehicle may have some driveability issues (low or high idle, stalling, poor fuel economy) the relearn should complete within 10 minutes of idling and then 10 minutes of driving.

good luck and keep me updated

wesleyschacht@hotmail.com

Posted on Jun 14, 2009

vortash
  • 431 Answers

SOURCE: my ford focus zetec 1.8 keeps over revving when

Hi I an Vortash there are a few things that can cause this ... Air at the inlet manifold caused by a faulty gasket ?.... Air leak in the Brake servo causing loss of Inlet vacum ( this would be noticeable with the fact that brakes would be a little spongy but not always and sometimes the engine revs increase when you put the brakes on when staionary ) Faulty throttle cable ... faulty throttle sensor .. best way to find out is to have the car checked out on a Krypton tune machine ( or equvalent ) to determine the fault otherwise you could spend out on un nesscasary parts .. at least the machine would pinpoint it for you .. It is always adviseable if you do your own repairs to get hold of a Haynes manual for your vehicle it will tell you all the best ways of treating most of your cars problems cheaply and efficiently hope this helps Regards Vortash

Posted on Jul 13, 2009

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