1999 5.4L Engine Shutoff???
 

I have a 1999 5.4L Engine Shutoff. Randomly I will turn on the engine and it will just shut off. I will have to hold the revs high for 2-3 minutes before it will idle normally and act normal. Today I had the same problem except it didn't ever clear and on my 5 minute drive home when I arrived in the driveway it was still having the same problem except it was just randomly idling somewhere in the 400 to 700 rpm range. Usually I have to hold it at 1000 or above to keep it running. I checked the oil pressure and it is perfect. Any help would be appreciated since I have a limited knowledge of engines and it is 1500 miles over warranty.

Maybe?

https://www.f150online.com/f150board...ML/004735.html

Could this be caused by the short trips. Moisture build up? not being able to burn off cause the engine not reaching normal operating temps? not sure, just a guess.

Not caused by short trips. I know for a fact that the engine gets to normal temperature almost everytime I drive. I was also wondering if the problem could be the alternater. This problem is occuring more and more frequently and I noticed today while looking under the hood that the alternater is acting wierd. I still need to do some more research.

Sounds just like a problem I had with my old Ranger. Turned out to be the Throttle Position Sensor (TPS). It was intermittent and the only way I found out what it was with a code scanner. I would check for computer codes.

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2000 F-150 Lariat SC Flareside ORP, Chestnut w/Arizona Beige two-tone; 5.4L, 3.55LS; 4wDisc-ABS; Remote Keyless Entry; Factory 6-Pack CD changer; Signal Mirrors; Rear Sliding Window; Ford Duraliner; Retrax Roll-top Cover; Flowmaster 70 Series Dual Exhaust; Cold AirBox Mod; Foglite mod; Tinted windows; VentVisors

[This message has been edited by beerman (edited 06-27-2001).]

MINE DID THAT-- CHECK THE 2 HOSES THAT GO INTO THE THROTTLE BODY IF YOU HAVE A VAC LEAK IT WILL NOT IDLE RIGHT.

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HTTP://PHOTOS.F150WORLD.COM/LAS52/99PICKUP1.JPG 99' F150 LARIAT S/C WOOD DASH -5.4---3.73'S AIRFORCE 1, AMSOIL, OFFROAD EQUIP GROUP, TOW PACKAGE ,TECH STYLE TONNEAU,

. pic atwww.f150world/las52/