HELP! NO START....
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Tuned
Joined: Feb 2006
Posts: 354
Likes: 9
HELP! NO START....
6.0 PSD in Excursion.. Here's the problem.... Starts fine in warm weather or when engine is warm.. When cold, it cranks just fine, engine coughs as if it's going to start, but will not. I read several posts on the FICM having solder issues on the circuit board. Here's my findings upon testing the FICM via multimeter. FICM is the 4 pin/screw version. Batteries are new!!! and load test ok..
Engine warm.... the pin closest to drivers fender tests: 48.7v key on, 47.8 cranking, 48.4 running
Engine cold (sat all night, 32 deg)..... 20.2 v key on, when key is shut off it jumps to 48v then quickly discharges / drops, when cranking it jumps from 22v to 48v then back and forth btw the two voltages.
When cranking, it will cough or hit on what sounds like one cylinder, as if it's going to start.
My first thought is that I need to remove the FICM, locate and solder the broken connections.
Any opinions or ideas?
Engine warm.... the pin closest to drivers fender tests: 48.7v key on, 47.8 cranking, 48.4 running
Engine cold (sat all night, 32 deg)..... 20.2 v key on, when key is shut off it jumps to 48v then quickly discharges / drops, when cranking it jumps from 22v to 48v then back and forth btw the two voltages.
When cranking, it will cough or hit on what sounds like one cylinder, as if it's going to start.
My first thought is that I need to remove the FICM, locate and solder the broken connections.
Any opinions or ideas?
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Tuned
Joined: Feb 2006
Posts: 354
Likes: 9
Ok,, Removed FICM, re-soldered the connections, as shown in the FICM repair posts... Reinstalled FICM... Immediately Tested to 48 V/DC.... Started engine,,, shut engine down,,, buttoned up everything,,,, NO START..... Tested FICM again, 28 mv/dc...
Guess I'm looking at a new FICM? Cost? Where to buy?
Guess I'm looking at a new FICM? Cost? Where to buy?
Hotshot
Joined: Apr 2010
Posts: 19,055
Likes: 235
From: Saratoga Springs,UT
Send it here
www.ficmrepair.com
Its a member on here 5030Tinkerer I beleive is his handle
from what II hear is a great guy and will take care of you
double check the ficm harness that its fulley plugged in and you have the ground wire hooked up could have got bumped
www.ficmrepair.com
Its a member on here 5030Tinkerer I beleive is his handle
from what II hear is a great guy and will take care of you
double check the ficm harness that its fulley plugged in and you have the ground wire hooked up could have got bumped
Hotshot
Joined: Apr 2010
Posts: 19,055
Likes: 235
From: Saratoga Springs,UT
the ground wire is exterior mouted to the back bolt on the intake manafold
IIRC its a black wire and has a Loop connector on the end to bolt directly to the back intake manafold bolt
I will see if I have a pic but it should be there
IIRC its a black wire and has a Loop connector on the end to bolt directly to the back intake manafold bolt
I will see if I have a pic but it should be there
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Tuned
Joined: Feb 2006
Posts: 354
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So where does it (loop connector) attach to the FICM? to the rear attachment bolts of the FICM?
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Hotshot
Joined: Apr 2010
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From: Saratoga Springs,UT
I didnt have a clear pic of it but it looked like it came out of the plug bundle closets to the firewall
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Hotshot
Joined: Apr 2010
Posts: 19,055
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From: Saratoga Springs,UT
the loop end goes to the intake manafold bolt the very rear one that the stud pokes up further so you can get a extra nut on it
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Tuned
Joined: Feb 2006
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Just to clarify...... the FICM attaches via two studs w/ nuts, toward front of engine, and two bolts on the back, closest to firewall.. Where does the looped negative wire attach to the FICM.. Does it attach at the studs or at the bolts?
I never took any wires loose other than the harness plugs that "plug in" on the bottom of the FICM. I just want to ensure I didn't miss this negative wire when I reinstalled the FICM.
I never took any wires loose other than the harness plugs that "plug in" on the bottom of the FICM. I just want to ensure I didn't miss this negative wire when I reinstalled the FICM.
Hotshot
Joined: Apr 2010
Posts: 19,055
Likes: 235
From: Saratoga Springs,UT
well if you only unplugged the ficm at the 3 spots then it should still be hooked up
the ground wire comes FROM the ficm
if you traced the rear bundle [the plug closest to firewall] of wires about 3 -4 inches away from the ficm plug 1 wire leaves the bundle and goes to the intake manafold bolt thats the ground wire
its probably fine
the ground wire comes FROM the ficm
if you traced the rear bundle [the plug closest to firewall] of wires about 3 -4 inches away from the ficm plug 1 wire leaves the bundle and goes to the intake manafold bolt thats the ground wire
its probably fine
Senior User
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Maybe a wire chafe at FICM connection? Check here...
Ford DTC codes & wire chafing locations - TheDieselGarage.com
Ford DTC codes & wire chafing locations - TheDieselGarage.com
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