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post #1 of 6 Old 06-21-2013, 03:56 AM Thread Starter
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Upgrade vacuum pump?

I've gone through several vacuum pumps through the years on these OBS 7.3's and was just wondering was there any upgraded versions available?

Could I go electric? Or would my cruise not work right? Just throwing some ideas out, I searched and looks like one guy was gonna try it but I never found where he actually did it. I can tell mine is getting weak again, and if all else fails, I will go and get a motorcraft pump straight from Ford this time. Maybe I'll have better luck out of it.

SOLD (AND SORELY MISSED):1996 F250 CC SB ZF5 4WD
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factory twin turbo and intercooler, 365 hp and 420 ft/lb torque
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post #2 of 6 Old 06-21-2013, 01:02 PM
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The cruise is electric as is your throttle. What the vacuum pump is used for is the brakes and HVAC. If you want to swap to a electric pump from a SD, you need to convert the brakes to a hydroboost system.

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post #3 of 6 Old 06-21-2013, 01:09 PM Thread Starter
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I was just wanting to get away from the mechanical vacuum pump that seems to have a very short life. The cruise may work off of throttle position, but my cruise will not work when the vacuum pump goes out. It's happened to me too many times in 2 different 1997 powerstrokes. I didn't know if a constant vacuum would mess with the cruise or not. I may try to find one and just mock it up to see how it works. If all else fails I'll just buy 2 mechanical pumps next time and keep one in the tool box. Ha!

SOLD (AND SORELY MISSED):1996 F250 CC SB ZF5 4WD
9000LB Ramsey winch, 3" dp, straight exhaust, superchips mini max, 6637 filter, Bar None Diesel E-fuel, South Bend Clutch, Autometer gauges, 4" Superlift, 315/75 Toyo MT's, custom step bars
2011 F150 CC 2wd with V6 Eco-boost
factory twin turbo and intercooler, 365 hp and 420 ft/lb torque
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post #4 of 6 Old 06-21-2013, 01:12 PM
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It's most likely the brake system shutting down the cruise when it senses that you have no vacuum. The F-Superduty used a hydroboost system for the brakes that uses the power steering pump rather than vacuum. You could swap to that and use a small electric pump for the HVAC.

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post #5 of 6 Old 06-21-2013, 01:15 PM Thread Starter
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Oh ok, yeah I was aware of the newer versions not using vacuum on anything and using the power steering pump pressure for the brakes. Not sure if I want to do that much customizing, the brakes and all work just fine off of vacuum, it's just the little cheesy pumps that keep going out. I'll look into an electric pump. Thanks.

SOLD (AND SORELY MISSED):1996 F250 CC SB ZF5 4WD
9000LB Ramsey winch, 3" dp, straight exhaust, superchips mini max, 6637 filter, Bar None Diesel E-fuel, South Bend Clutch, Autometer gauges, 4" Superlift, 315/75 Toyo MT's, custom step bars
2011 F150 CC 2wd with V6 Eco-boost
factory twin turbo and intercooler, 365 hp and 420 ft/lb torque
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post #6 of 6 Old 06-21-2013, 07:33 PM
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I don't think you will find a suitable electric vacuum pump that has the capacity needed for our brakes. Cheers!

1997 F250 SC 4x4, E4OD, 4.10 LS, Basically Stock, Relocated Block Heater Plug, External Trans Filter, Tru-Cool Max, I/C Mounted but not Plumbed

SOLD - 1994 F350 CC DRW 2WD PSD, 5 Speed, 4.10 LS, SBC Con-O, Baldwin Filter, Tymar HPX Hose, DPPI DP, Bilsteins, $12 AIC, Coolant Filter, Explorer Overhead Console, A-Pillar w/ISSPRO Black Ice, EV Boost, and EV Pyro, Modified Pedestal, Gutted EBPV.
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