F250 pcm vs F550 pcm ? - Ford Powerstroke Diesel Forum
 
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post #1 of 9 Old 02-18-2012, 08:15 PM Thread Starter
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F250 pcm vs F550 pcm ?

Is there any advantage or disadvantage to installing a 2000 F550 manual trans PCM in a 2000 manual trans F250 ?

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post #2 of 9 Old 02-22-2012, 04:30 AM Thread Starter
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bump..................

2000 F250 King Ranch Crew Cab 7.3L LB 4X4 100% home brewed Biodiesel
ZF6 6SPD trans
Zoo Dad Mod
DP F5 Tuner
Wicked Wheel
AFE Intake
4" straight exhaust with 5" tip
Isspro 3 Gauge Pod
285/75/16 Cooper ATP on factory 16's
Banks Big Head
298K
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post #3 of 9 Old 02-22-2012, 02:54 PM
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I cant see how it would make any difference at all. A 550 is essentially the same thing as a 250 other than the suspension and axles.

2001 F350 SRW CC 4WD LB
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2000 F550 CC 2WD
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post #4 of 9 Old 02-22-2012, 06:14 PM Thread Starter
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There are 2 different codes a dac3 for the 250 and vxy3 for the 550. My thought would be that the 550 would be tuned for pulling a larger load , like a tow tune. I would be using my DP F5 chip, so I think that would give me the tunes and the PCM would run the essential systems like timing etc.

2000 F250 King Ranch Crew Cab 7.3L LB 4X4 100% home brewed Biodiesel
ZF6 6SPD trans
Zoo Dad Mod
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Isspro 3 Gauge Pod
285/75/16 Cooper ATP on factory 16's
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post #5 of 9 Old 02-22-2012, 06:16 PM
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I know in the newer motors the bigger trucks had de-tuned strategies to help protect the motor in the HEAVY load situations. But since you're gonna tune it anyway, that wouldn't matter.


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post #6 of 9 Old 02-22-2012, 06:22 PM
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If your already tuning it, then a different PCM isn't going to change anything. You'll just have to re-tune your DP to accommodate the new PCM. The 550 PCM, if anything, is de-tuned to last longer under heavier loads. Look at a 2012 Powerstroke. The 450/550's are de-tuned for this same reason.

Allen
1999.5 F-350 7.3, six-speed
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post #7 of 9 Old 02-22-2012, 06:37 PM Thread Starter
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I need a new PCM ,so if i don't get a DAC3, then I'll need to get my DP chip reburned.

2000 F250 King Ranch Crew Cab 7.3L LB 4X4 100% home brewed Biodiesel
ZF6 6SPD trans
Zoo Dad Mod
DP F5 Tuner
Wicked Wheel
AFE Intake
4" straight exhaust with 5" tip
Isspro 3 Gauge Pod
285/75/16 Cooper ATP on factory 16's
Banks Big Head
298K
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post #8 of 9 Old 02-22-2012, 08:20 PM
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F550's are not obd2 compliant. and will not pass the emissions in some states if you install it in a 250. and most small shops will not be able to access the info with a standard diagnostic scanner. we run several 550's and 10 plus 350's @ work. our in house mechanics cannot properly diagnose the driveability issues on the 450's or 550's they go to ford. which sucks cus a simple problem takes my truck down for at least a week.

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post #9 of 9 Old 02-22-2012, 09:14 PM
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Why can't they diagnose? 7.3s aren't OBD compliant either. CAN system.


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