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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

Engine die

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Old Nov 24, 2004 | 04:30 AM
  #1  
V8 Andy's Avatar
V8 Andy
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From: south west of Germany
Question Engine die

Hi,
i need some ideas what this could be.
Truck (signature) runs well, start up is no problem, cold and hot, the idle is very good at ~ 600 rpm, but when i give some gas that the rpm is about 1500 and i let fall the the rpm suddenly, the egine begins to bucking cause of a low idle, 200 - 400 rpm and sometimes it dies. Sometimes it comes back and the idle is fine again.
I installed new gas tanks, new fuel filter, new air filter .... could this be something caused from the ignition or the electronic egine control ?
The Fuel pumps run also well ! could it be that 2 gallons in one tank is to little ? for running the 5.8 l

Thanks
 
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Old Nov 24, 2004 | 06:00 AM
  #2  
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GermanGuy
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From: Northwest Germany
Question

Hi Andy,

the idle RPM may be a little low. Did you check the Idle Air Control Valve?

LoL Dieter
 
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Old Nov 24, 2004 | 09:27 AM
  #3  
V8 Andy's Avatar
V8 Andy
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From: south west of Germany
what ? 600 rpm is to low ? ok, sorry there are about 700...
but the idle speed valves and sensors are working !
 
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