I have a 99 ford svt lightning, it starts and idles but dies if you give it any throttle. I soaked a towel in gas to get it home

Long High idle after start up - YotaTech Forums

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Dec 20, 2011 - aviator's Avatar ... When the high idle is no longer needed the piston retracts and the throttle ... Sometimes the piston gets gunky and slow to react... clean the ... you are already idling higher then normal the idle up will only be worse... for ... it takes to kick down when I first start it up, high idle is at 2200 RPM it ...Missing: lincoln

High idle at start up - F150online Forums

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Oct 27, 2007 - ... King Ranch · Lightning · Lincoln Blackwood & Mark LT · SuperCrew · SVT ... my 2000 when its been sitting goes up close to 2k then drops down in seconds. ... so what your saying is when it's cold outside I can expect it to start andidle at 2200 rpm. sounds pretty off to me. ... Vehicle: 2004 Ford F150 5.4L. 4.6l Intermittent High Idle. Why?
Jul 12, 2005
Dual remote oil filters????
Jun 29, 2001
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A lot of things can cause that on those old OBD1 systems. But I would start with cleaning the throttle plate and surrounding area with Carb cleaner, it may just not be getting enough air at idle do to carbine (Muck) deposits around the throttle plate. I would take off air cleaner hose, soak paper towel with cleaner, and open throttle plate and clean back in as far as you can reach, and the edges of the throttle plate. Hope this helps, good luck.

Engine stalls cold or RPM fluctuates at idle up and down or dies near idle.

This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve but always run a OBD2 fault code as well as the cleaning procedure. Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control. If the above cleaning doesn't cure your issues you need to have the computer controlled automatic idle speed control system diagnosed and repaired by a dealer or electronic engine control repair shop.

clean the idle air control valve. This thing controls your idle speed but gets gummed up with deposits. buy a can of spray carb cleaner and maybe a cheap set of torx L wrenches if you dont have any. remove IAC and clean valve and bore with paper towels and carb cleaner. Also use some of that carb cleaner to clean the throttle bore and plate using an old toothbrush and towels. and lastly replace the PCV valve. Your truck will now idle like it just came off the showroom floor!

it could be u needd new spark plugs and the sparks or the timings offf change sparkplugs and plugs and ur gasfilter tat sud do it .

From your description of the problem The first thing that comes to light is the idle air control valve.
This devise is mounted near the throttle body and controls the airflow past the throttle plate when the throttle is closed.
There isn't a position sensor on itso if it becomes sticky it won't turn on your check engine light.
It's a fairly common problem. I have tried in the past to free them up but it never seems to work out well.
Hope this helps you along to a repair.

check all spark plugs and wires also check mass air flow senser located on intake tube if all is still in good working condition check the throttle position sensor if that is good then it may be your fuel pump please update when possable.

IT COULD BE THE IDLE SPEED SENSOR THAT IS NOT ALLOWING IT TO STAY RUNNING. THIS DEVICE IS LOCATED NEAR THE THROTTLE BODY, WITH A PLUG ON IT WITH THREE WIRES. UNPLUG IT TO SEE IF IT WILL IDLE. IF IT DOES THEN REPLACE IT. HOPE THIS HELPS YOU. PLEASE KEEP ME INFORMED. THANKS FOR USING FIX-YA. AND THANK YOU IN ADVANCED FOR AN HONEST RATING.

Have you ever changed the fuel filter? If it's not that, and it's not a vacuum leak, it is probably your idle air control valve.

check air flow duct where the throttle valve is . check the pvc valve . make sure it isnt stuck open. check the egr valve . it will stick open stall out motor .use a scanner it will tell you if you got egr valve problems. check fuel pressure. it could be stop up fuel filter bad fuel pump fuel pump relay.your car problem sound like a major vacuum leak . change spark plug and wires if they have not been change in a while. it could idle air control. hook a scanner .it could give you a code.