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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

1990 F-150 stalling

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Old Oct 19, 2008 | 12:51 PM
  #1  
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kelboy1971
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1990 F-150 stalling

I have a 1990 F150 4x4 with the 5.8, it used to run fine now it idles really rough and bearly has enough power to pull it's self, and when I do get it up to speed it stalls when I get to a red light. I have recently changed the MAP sensor and coolant sensor. What else could it be? how do I check for codes? any help would be great, thanks guys.
 
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Old Oct 19, 2008 | 01:25 PM
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This site will guide you through the code retrieving process: Ford Fuel Injection How To Run a Self-Test
 
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Old Oct 20, 2008 | 09:46 AM
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Tps,(trottle Position Sensor)maybe,i'm Just Guessing.mine Does The Same Thing.replaced The Coolant Sensor,module,stator,coil,wires,spark Plugs,cap,hollowed My Cat,new Muffler,air Filters,cleaned My 02 An Iac.next Will Be The Tps,pulled Codes Said That The Egr An Or Sensor On Egr Was Bad.cant See An Egr Making It Run So Bad.next Step, Buy A Toyota.
 
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Old Oct 20, 2008 | 11:12 AM
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Could be a fuel pump....or many other things.
 
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Old Oct 20, 2008 | 12:34 PM
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Codes first...and on a '90 they will be 2-digit.

Jason
 
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Old Oct 20, 2008 | 12:46 PM
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<i>it idles really rough and bearly has enough power to pull it's self, and when I do get it up to speed it stalls when I get to a red light.</i>

My "off the top of my head" guess after reading that would be the EGR valve is stuck open a little.
That is if its not in a dire need of a tune up.....
 
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Old Oct 20, 2008 | 08:21 PM
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Bad or cracked spark plugs...or bad wires...alos make sure your 7 and 8 wires aren't arcing off of each other....
 
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