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Old 11-21-2012, 04:56 AM   #1 (permalink)
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Default ECM question

I am replacing the ECM in my 97 Taurus GL 3.0 Vulcan.

I think it is bad due to a hot starting issue, I am going to pull one at Pick a Part.

Do I need to reprogram the ECM or is it plug and play,anything else I need to know?

Thanks
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Old 11-21-2012, 07:10 AM   #2 (permalink)
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On a Vulcan you do not need to get it programmed. On a 96-99 Vulcan it is plug and play. Just make sure you get one that has the exact same part number on it: A 4 digit code like ALP2.
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Old 11-21-2012, 10:18 AM   #3 (permalink)
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^^^^Yes, as Bull Geek mentioned, they are plug and ply so long as you match the part number from the casing of your ECM to the replacement one.
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Old 11-21-2012, 10:31 AM   #4 (permalink)
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Its possibly the PCM, but unlikely. What other troubleshooting have you done? Have you checked fuel pressure bleed off rate after shutdown to look for a possible leaking injector, leaking FPR, or bad anti backflow valve in the fuel pump? Have you checked the ECT PID to see if it is telling the PCM the correct temp? Exactly what are the symptoms?
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Old 11-21-2012, 02:36 PM   #5 (permalink)
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I'm a new member I have been reading posts and have learn alot of good information,But have not found the solution to an on going problem with my 97 Taurus GL 3.0 Vulcan 189000 miles.The problem is after I drive the car and then run into a store for approx 15-20 minutes apon restart the car will chug like it has a bad miss fire and then clear up an run fine within seconds if i give it throttle it helps clear it out.
Things I have replaced
1)spark plugs and spark wires
2)fuel pump and fuel filter
3)fuel pressure regulator
4)fuel injectors all 6 (motorcraft)
5)air filter
6)coolant temp sender to computer
7)egr valve
8)changed MAF with known good one (no change)
9)checked for vacuum leaks (found none present)
10)cleaned throttle body
11)replaced IAC
12)no codes in ecu
Any ideas on what the problem is would be greatly appreciated
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Old 11-21-2012, 02:59 PM   #6 (permalink)
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It seems like a hot soak problem.I recently checked for fuel pressure bleed

off and it held 30psi for over 30 minutes, when I start the engine it stays

at 30psi and goes to 40 with the vac line removed from the fuel regulator,

the exhaust does not smell rich of fuel.

The funny thing is if I start the engine 5 minutes after or 45 minutes after.


it starts fine it seems to only happen in the 15-30 minute time frame,I can

set a timer and duplicate the problem every time.

(this problem only happens when the engine is shut off after it is at normal operating temperature)



I don't know what to try next?
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Old 11-21-2012, 03:09 PM   #7 (permalink)
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Am I wrong, or is the fuel pressure supposed to be a bit higher than that (around 40psi) on 96' and newer? Or maybe even older? Then 50 with the vac line of of the regulator.
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Old 11-21-2012, 03:30 PM   #8 (permalink)
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Repair manual said 26-45 running, 37-45 key on engine off. 30psi maybe a

little low but car starts fine any other time except the 15-30 minute time

frame.(with same fuel pressure readings)

Problem still remains after new fuel pump was installed.
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Old 11-21-2012, 05:39 PM   #9 (permalink)
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Did you get those new O2 sensors installed?

Breeves, higher fuel pressure was only for the DOHC engines in that year range I believe.
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Old 11-21-2012, 06:31 PM   #10 (permalink)
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Just ordered them I dont know if it will fix the problem but they are original and slow switching
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