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#2045874 - 05/13/10 11:19 AM Best way to "kill" computer to let it reset?
theProfessor Offline
Member

Registered: 12/06/00
Posts: 206
Loc: milwaukee, WI usa
To kill the computer in order to let everything re-set, is it best to disconnect it at the firewall by pulling the harness clip or to just disconnect the battery?
_________________________
2001 Crown Vic with the combination of options known in later years as the Sport Totally stock LA auto show 2001 display car duplicate in Torreador red
63,500 miles as of 03/14/2013
Previously: 1993 (it was totaled) and 1995 (old age) WI State Patrol squads

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#2045881 - 05/13/10 11:28 AM Re: Best way to "kill" computer to let it reset? [Re: theProfessor]
Codyy Offline
Fearless Leader
Poobah

Registered: 03/01/09
Posts: 5746
Loc: Up North Eh
Disconnect the battery or KAM (Keep-Alive-Memory) fuse.

I usually just disconnect the battery at the negative terminal for a few.
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#2045885 - 05/13/10 11:30 AM Re: Best way to "kill" computer to let it reset? [Re: Codyy]
Tracy Offline
Over the Hill

Registered: 09/07/09
Posts: 3834
Loc: West Bend, WI, USA
Disconnect battery for about 10 minutes.
Reconnect and let engine idle for about 5 minutes to "relearn" the idle process.
While this is going on, reset clock and radio presets.
_________________________
1999 Deep Wedgewood Blue & Rust P71, 21x,xxx miles, full cloth interior, 3L55 RAR, BH1976 Headlight Relay Harness, and a few other mods. Former Chippewa Falls, WI PD car. I'm the 3rd owner of car.
Now with Mustang Wheels, Honeycomb Grille, and Ford AM/FM CD player with RDS.



Download your Owner's Manual FREE from the Ford Owner's Site

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#2045888 - 05/13/10 11:34 AM Re: Best way to "kill" computer to let it reset? [Re: Tracy]
98VicP71 Offline
14.6@93MPH
Grand Poobah

Registered: 03/28/06
Posts: 12731
Loc: ATL
^^^ what he said. Just did it to my lincoln night before last after cleaning the MAF..

Car runs great now, no more hesitation, missing, or detonation.
_________________________
1993 Lincoln Town Car 150k+ - RIP 5/10/2011
1998 Ford Crown Victoria P71 - RIP 12/25/2006
2001 Ford Crown Victoria P71(Count blackula) 180k+ - Ummmmmm evil

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#2045903 - 05/13/10 11:52 AM Re: Best way to "kill" computer to let it reset? [Re: 98VicP71]
Richard1234 Offline
n00b

Registered: 04/25/10
Posts: 32
Loc: Owen Sound Ontario Canada
I had the same issue a week ago. Small hesitation when trying to go. Cleaned MAF, good as new.
_________________________
1997 Crown Victoria LX 190 000 kms
Modds: P71 PCM, J-Mod, 3.55 RAR, Trac-Lok
Wants: MZT, Under Drive Pullies, Other side of exhust

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#2045987 - 05/13/10 01:43 PM Re: Best way to "kill" computer to let it reset? [Re: Tracy]
Rizzo Offline
J-MOD Master
Metroplectic

Registered: 03/06/04
Posts: 28474
Loc: Romulus,MI
 Originally Posted By: Tracy
Remove PCM fuse,4th down middle row behind battery. 30 amp I think. BIG FUSE LOL (Maxi)Disconnect battery for about 10 minutes.
Replace fuseReconnect and let engine idle for about 5 minutes to "relearn" the idle process.
While this is going on, reset clock and radio presets.



\:D


_________________________


The Jmod video is done! LINK!

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#2046191 - 05/13/10 08:00 PM Re: Best way to "kill" computer to let it reset? [Re: Rizzo]
124neta Offline
Over the Hill

Registered: 04/03/09
Posts: 4566
Loc: Crook County, IL
I always hear people say wait 10 min, ive always been able to clear codes by disconecting battery for no more than 5 seconds.

Guess every car can be different tho
_________________________
propensity for self-distraction

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#2046286 - 05/13/10 09:45 PM Re: Best way to "kill" computer to let it reset? [Re: Rizzo]
coldfusion11 Offline
n00b pwn
Over the Hill

Registered: 08/31/06
Posts: 4321
Loc: Rochester Hills, MI
 Originally Posted By: AKA_Rizzo
 Originally Posted By: Tracy
Remove PCM fuse,4th down middle row behind battery. 30 amp I think. BIG FUSE LOL (Maxi)Disconnect battery for about 10 minutes.
Replace fuseReconnect and let engine idle for about 5 minutes to "relearn" the idle process.
While this is going on, reset clock and radio presets.



\:D




mine is the only green one in the row of reds
_________________________
2002 CV P73
Power/Suspension Mods: ADTR P&P upper plenum, dual exhaust and flowmaster original 40's/Marauder Tips turbo mufflers and dumps, FRPP 3.55 Tlock, Lonnie at BOC Tune, Marauder MAF and Box w/ '04 Zip tube, IAS rear shocks, HPP 21mm rear bar, ENS rear poly kit, ADDCO STOCK front sway bar, J-Mod by Rizzo...
Appearance/Sound Mods: Color match grill surround, Hella 500's behind grill, clear corners with corner light turn signal mod w/ 168 brighter bulbs, black grained mirror caps, Pioneer HU with two kicker L7 ported on a Hifonics HFI2000D at 2000w rms, BH1976's famous headlight wiring harness, LED reverse bulbs, 80w/100w headlight bulbs...




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#2046332 - 05/13/10 10:22 PM Re: Best way to "kill" computer to let it reset? [Re: coldfusion11]
bensharn Offline
Member

Registered: 03/13/10
Posts: 133
Loc: El Dorado, AR
Just unplug the battery
_________________________
2003 Silver Base
Mods list...still growing....


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#2046345 - 05/13/10 10:39 PM Re: Best way to "kill" computer to let it reset? [Re: bensharn]
Rengate Offline
Over the Hill

Registered: 02/18/09
Posts: 1133
Loc: central IL US 309-232-1942
No tools needed to pull fuse, and don't have to set clock again, I say. Pull Fuse.
_________________________



Rengate_2000@yahoo.com

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#2046442 - 05/14/10 02:52 AM Re: Best way to "kill" computer to let it reset? [Re: bensharn]
Rizzo Offline
J-MOD Master
Metroplectic

Registered: 03/06/04
Posts: 28474
Loc: Romulus,MI
 Originally Posted By: bensharn
Just unplug the battery



Thanks for clearing up a whole thread on confused idiots with such a dismissive comment.
_________________________


The Jmod video is done! LINK!

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#2046535 - 05/14/10 09:54 AM Re: Best way to "kill" computer to let it reset? [Re: Rizzo]
98VicP71 Offline
14.6@93MPH
Grand Poobah

Registered: 03/28/06
Posts: 12731
Loc: ATL
 Originally Posted By: AKA_Rizzo
 Originally Posted By: bensharn
Just unplug the battery



Thanks for clearing up a whole thread on confused idiots with such a dismissive comment.



So I am a Confused idiot huh.....



Well I have an advantage I have a quick disconnect on my negative battery terminal that I just have to un-screw a little to disconnect..



Also when I re-connected the only thing I had to re-set was my clock. The radio keept all its pre-sets.
_________________________
1993 Lincoln Town Car 150k+ - RIP 5/10/2011
1998 Ford Crown Victoria P71 - RIP 12/25/2006
2001 Ford Crown Victoria P71(Count blackula) 180k+ - Ummmmmm evil

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#2721731 - 06/13/13 03:18 PM Re: Best way to "kill" computer to let it reset? [Re: theProfessor]
Prospect62 Offline
n00b

Registered: 01/15/10
Posts: 44
Loc: Upstate, NY
Sorry to dredge up an old thread here but what are the advantages of "resetting" the PCM? I've seen it done to clear OBD II codes (although this is the wrong way to do that), and I've seen it done to reset the PCM after a TPS or something is changed so the idle can be re-learned.

Is there any advantage to doing this "just because"? I just bought my car, thinking maybe if I reset my PCM the car will learn how I drive and be more responsive to my driving style. Is that a load of BS?

I'm new to the Panther platform so any info would be great.
_________________________
Black 2004 CVPI Ex-Vermont SP

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#2721737 - 06/13/13 03:22 PM Re: Best way to "kill" computer to let it reset? [Re: Prospect62]
Blackcvpi Offline
Cynical Jackass
Poobah

Registered: 05/19/09
Posts: 5301
Loc: Your mom's house
Originally Posted By: Prospect62
Sorry to dredge up an old thread here but what are the advantages of "resetting" the PCM? I've seen it done to clear OBD II codes (although this is the wrong way to do that), and I've seen it done to reset the PCM after a TPS or something is changed so the idle can be re-learned.

Is there any advantage to doing this "just because"? I just bought my car, thinking maybe if I reset my PCM the car will learn how I drive and be more responsive to my driving style. Is that a load of BS?

I'm new to the Panther platform so any info would be great.


I don't think the computers are advanced enough in these cars to learn your driving style. Won't hurt to try but I don't think it will have any effect.

If you really wanna wake it up and have it drive better get a custom tune from Blue Oval Chips.
_________________________
2003 Crown Victoria ( AKA Car Craft Crown Vic ) ff, Trick Flow 38CC top end kit, Full SW exhaust, MM Airbox and MAF, ADTR zip tube, 78mm BBK Plenum and TB, Tuned by RET in Downey CA, Jmod, 3.73 with track lok, Naake coilover suspension, Henious control arms, Mettco watts link, Addco sway bars, 17" steel rims widened to 9.0 with 285/40/17 tire in the rear....more mods coming soon.

08 F250 Super Duty Lariat Crew Cab, 6.4 Powerstroke Turbo Diesel, Daystar leveling kit with Bilstien Shocks [/size]



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#2721784 - 06/13/13 04:59 PM Re: Best way to "kill" computer to let it reset? [Re: Blackcvpi]
RF_Overlord Offline
Over the Hill

Registered: 12/14/02
Posts: 2724
Loc: MA
Originally Posted By: Blackcvpi
I don't think the computers are advanced enough in these cars to learn your driving style.
Yeah, they are. It's called Adaptive Programming. It will adjust the LTFT and spark tables a bit depending on whether you drive Miss Daisy or you're Ken Block...

Prospect62, there's no benefit to resetting the PCM "just because". If you made a large change, such as cleaning a really dirty MAF, resetting it can speed up the learning process, but once the PCM has adapted as far as it can to your driving style, resetting only forces it to start all over.
_________________________
'03 Mercury Marauder (Black)
Trilogy Motorsports supercharged #61
Too many mods to list / Driveway Queen

'00 Grand Marquis GS (Silver)
No ABS, no RAS, no Traction Control, manual HVAC,
single exhaust, 2.73 open, and an ugly-ass landau roof.
Exactly what I wanted in a DD: simple.

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