Help please (no start)
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Freshman User
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Help please (no start)
Hello,
this is what I have and where I'm at.
1993 F150 put in 5.8 to replace a 5.0
The 5.8 came out of a 1995 f250
Timing set at tdc ( triple checked)
got power to coil
Got spark
Can hear fuel pump and smell fuel
Checked wire placement and firing order many times
Put in a new computer for a 1995 5.8
Using the wiring harness for a 1993 5.0 (so all wires would match up)
brand new distributor, cap, rotor, wires
got it to run but was rough as hell so I tired messing with the timing and nothing helped, put in a O2 sensor hoping it was two rich and the computer would fix the issue
Now can't get it to start acts like it wants to but just doesn't go...
I tore it down to the timing chain to check timing and all is dead nuts tdc...
Still just acts like it wants to go but doesn't...
Moving the distributor stops it from trying to start or trying to start... But it is way off of tdc for it to try to start...
Deleted the smog and AC
I am at a loss and end of my wits... Please help...
Thanks
Keith
this is what I have and where I'm at.
1993 F150 put in 5.8 to replace a 5.0
The 5.8 came out of a 1995 f250
Timing set at tdc ( triple checked)
got power to coil
Got spark
Can hear fuel pump and smell fuel
Checked wire placement and firing order many times
Put in a new computer for a 1995 5.8
Using the wiring harness for a 1993 5.0 (so all wires would match up)
brand new distributor, cap, rotor, wires
got it to run but was rough as hell so I tired messing with the timing and nothing helped, put in a O2 sensor hoping it was two rich and the computer would fix the issue
Now can't get it to start acts like it wants to but just doesn't go...
I tore it down to the timing chain to check timing and all is dead nuts tdc...
Still just acts like it wants to go but doesn't...
Moving the distributor stops it from trying to start or trying to start... But it is way off of tdc for it to try to start...
Deleted the smog and AC
I am at a loss and end of my wits... Please help...
Thanks
Keith
Fleet Owner
Joined: Aug 2005
Posts: 23,668
Likes: 301
From: Easton,Ks
Just notes:
A 1993 uses a push start Ignition harness, push start Gray ICM & a push start Computer (PCM).
A 1995 uses a CCD Ignition harness, CCD Black ICM & a CCD PCM Computer.
So to use the 1993 harness you need to rewire the IDM wire going to the PCM and change the ICM to a Black ICM.
Remove the start wire from the ICM (NU in 1995) and put the IDM wire there.
Also the 1993 5.0L uses one O2 sensor and the 1995 5.8L uses two O2 sensors. This might be your biggest problem.
A 1993 uses a push start Ignition harness, push start Gray ICM & a push start Computer (PCM).
A 1995 uses a CCD Ignition harness, CCD Black ICM & a CCD PCM Computer.
So to use the 1993 harness you need to rewire the IDM wire going to the PCM and change the ICM to a Black ICM.
Remove the start wire from the ICM (NU in 1995) and put the IDM wire there.
Also the 1993 5.0L uses one O2 sensor and the 1995 5.8L uses two O2 sensors. This might be your biggest problem.
Cargo Master
Joined: Mar 2010
Posts: 3,342
Likes: 294
From: Laramie, WY
Sounds counter intuitive but you may want to try the 93 pcm. Ford had a habit of swapping a wire here or there across years, could be an issue for you. 93 truck with 93 harness probably needs a 93 PCM. If that does it, then worry about 5.0L vs 5.8L PCM.
it wouldn't hurt to check fuel pressure either. Did this 5.8L run before being dropped in or is it a rebuild? Was the 5.0L truck running before the swap?
it wouldn't hurt to check fuel pressure either. Did this 5.8L run before being dropped in or is it a rebuild? Was the 5.0L truck running before the swap?
Thread Starter
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Freshman User
Joined: Jan 2017
Posts: 40
Likes: 0
Sounds counter intuitive but you may want to try the 93 pcm. Ford had a habit of swapping a wire here or there across years, could be an issue for you. 93 truck with 93 harness probably needs a 93 PCM. If that does it, then worry about 5.0L vs 5.8L PCM.
it wouldn't hurt to check fuel pressure either. Did this 5.8L run before being dropped in or is it a rebuild? Was the 5.0L truck running before the swap?
it wouldn't hurt to check fuel pressure either. Did this 5.8L run before being dropped in or is it a rebuild? Was the 5.0L truck running before the swap?
Thread Starter
|
Freshman User
Joined: Jan 2017
Posts: 40
Likes: 0
Just notes:
A 1993 uses a push start Ignition harness, push start Gray ICM & a push start Computer (PCM).
A 1995 uses a CCD Ignition harness, CCD Black ICM & a CCD PCM Computer.
So to use the 1993 harness you need to rewire the IDM wire going to the PCM and change the ICM to a Black ICM.
Remove the start wire from the ICM and put the IDM wire there.
Without looking I think the start wire goes to the PCM in the 1995 5.8L.
Also the 1993 5.0L uses one O2 sensor and the 1995 5.8L uses two O2 sensors. This might be your biggest problem.
A 1993 uses a push start Ignition harness, push start Gray ICM & a push start Computer (PCM).
A 1995 uses a CCD Ignition harness, CCD Black ICM & a CCD PCM Computer.
So to use the 1993 harness you need to rewire the IDM wire going to the PCM and change the ICM to a Black ICM.
Remove the start wire from the ICM and put the IDM wire there.
Without looking I think the start wire goes to the PCM in the 1995 5.8L.
Also the 1993 5.0L uses one O2 sensor and the 1995 5.8L uses two O2 sensors. This might be your biggest problem.
Thread Starter
|
Freshman User
Joined: Jan 2017
Posts: 40
Likes: 0
ICM
Just notes:
A 1993 uses a push start Ignition harness, push start Gray ICM & a push start Computer (PCM).
A 1995 uses a CCD Ignition harness, CCD Black ICM & a CCD PCM Computer.
So to use the 1993 harness you need to rewire the IDM wire going to the PCM and change the ICM to a Black ICM.
Remove the start wire from the ICM (NU in 1995) and put the IDM wire there.
Also the 1993 5.0L uses one O2 sensor and the 1995 5.8L uses two O2 sensors. This might be your biggest problem.
A 1993 uses a push start Ignition harness, push start Gray ICM & a push start Computer (PCM).
A 1995 uses a CCD Ignition harness, CCD Black ICM & a CCD PCM Computer.
So to use the 1993 harness you need to rewire the IDM wire going to the PCM and change the ICM to a Black ICM.
Remove the start wire from the ICM (NU in 1995) and put the IDM wire there.
Also the 1993 5.0L uses one O2 sensor and the 1995 5.8L uses two O2 sensors. This might be your biggest problem.
Fleet Owner
Joined: Aug 2005
Posts: 23,668
Likes: 301
From: Easton,Ks
They are not the same.
The gray and the black ICM require two different PCM computer and the engine wiring is different for the two type of ICM's.
Just ask for a ICM for a 1995 Ford Mustang with a 5.0L engine. The you will get the right Black ICM for 1994 and newer Trucks.
With the Black ICM:
With the Gray ICM:
/
The gray and the black ICM require two different PCM computer and the engine wiring is different for the two type of ICM's.
Just ask for a ICM for a 1995 Ford Mustang with a 5.0L engine. The you will get the right Black ICM for 1994 and newer Trucks.
With the Black ICM:
With the Gray ICM:
/
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Thread Starter
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will try in the am
Thank you very much for the input. I'm going to get right on it in the morning... Will let you know how it goes...do I need to attach the pip a to the pip b or will that be done automaticlly. If you know how would I add a second o2 sensor can i?
Thanks Keith
Thanks Keith
Fleet Owner
Joined: Aug 2005
Posts: 23,668
Likes: 301
From: Easton,Ks
Not sure on that one. You could have a new port welded on the exhaust and then wire it to PCM. I can not think of the right name for the port.
Thread Starter
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Freshman User
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thanks it started
Thanks for the help it is alive again. runs rough but think it is just adjustments... runs pretty good but gets real rough in gear.. But it is a step in the right Direction... I am very thankful for the help.
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