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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

idle adjustment

 
  #1  
Old 08-27-2009, 11:58 PM
dakoda60
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idle adjustment

i have a 87 f150 4.9 300 straight 6 and it dies most times when i first start it and its cause its idlein at 500 rpm and i think it should idle at bout 700 to 900 if thats correct and i was wondering how u adjust it to make it idle at a higher rpm because this truck is the first efi vehicle ive owned n i dont know how to mess with those kind of idlers so any helpful hints n tips would be greatly appreciated thanks
 
  #2  
Old 08-28-2009, 06:37 AM
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no adjustment, you have to take a pair of pliers, and do a little bending to fine tune it. usually there is another problem that needs to be adderessed, probably a vaccume leak some where.
 
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Old 08-28-2009, 07:04 AM
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yea there is no way of chaning it without reprograming the ecm. like charlie said check your vaccum like but also take a look at the icu or the tps. does it run right other than idle

jake
 
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Old 08-28-2009, 03:52 PM
dakoda60
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yes it runs fine other than the idle it just idles way to low its idlin at 500
 
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Old 08-28-2009, 09:22 PM
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Check to make sure there are all the vacume lines hooked up.

Same problem I had with my truck when I got it. There was a large vacume on the back of the intake that was leaking.
 
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Old 08-29-2009, 12:01 PM
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Sorry but I am beginner as well what does mean ICU and TPS
 
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Old 08-29-2009, 12:36 PM
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The TPS is Throttle Position Sensor, don`t know what ICU is.
However the thing that controls idle is the Idle Air Control valve. Quite often cleaning it with carb cleaner is all that is needed.
Also a basic tune up of plugs, possibly wires, fuel filter, air filter and PCV can work wonders.
 
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Old 08-29-2009, 03:00 PM
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And if you do have all your vacume lines hooked up and such, you can get a can of "SeaFoam". Little in your gas, little in vacume lines, makes a world of difference. Cleans it right up.
 

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