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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

OBD 1 port?

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Old Mar 2, 2009 | 09:49 PM
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OBD 1 port?

I have a 1990 F-150 with the 300 I6. the check engine light keeps coming on I have a obd 1 code reader (just got it) then when I went to plug it in it wasn’t under the dash like I thought it would be I checked the Chiltons but it says nothing about where it would be. Dose anyone know where it is?<?xml:namespace prefix = o ns = "urn:schemas-microsoft-comfficeffice" /><o></o>
 
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Old Mar 2, 2009 | 09:54 PM
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It's on the drivers side inner fender clipped up behind the air filter box.
 
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Old Mar 2, 2009 | 09:59 PM
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yah i saw do i unplug the wires going into that and then plug them into my reader? cause other than that i didnt see any way to plug my reader into it
 
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Old Mar 2, 2009 | 11:29 PM
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Originally Posted by truckertom21
yah i saw do i unplug the wires going into that and then plug them into my reader? cause other than that i didnt see any way to plug my reader into it
You must be looking at the wrong thing. You want this funky looking plug, it probably has a cover over it with "EEC Test" on top...

 
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Old Mar 3, 2009 | 12:11 AM
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yah i looked it up here on this site...ran the codes it was #10

it means that the no 1 cyl is bad...im hopeing its just the rings.
 
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Old Mar 3, 2009 | 04:36 AM
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10 isn't a valid code for these trucks. That code should only come up after a cylinder balance test, which our batch injected trucks cannot perform.
 
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Old Mar 3, 2009 | 11:05 AM
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oh...i see well im gonna finnish doing my comp. test, i started doing it but only got past the no 1 cyl, and that was really low. if the truck cant do the cylinder balance test then why did it show the code?
 
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