Vacuum pump confusion

[MuRCieLaGo]

Originally Posted by Dynomite

I am the Contrarian here

I love the Secondary System operating and it is very easy to maintain if you block TB Coolant at the Injector Housing.

I really like the FULL ENGINE POWER light on the panel on the 1990s. On the 1991 you only have the green tiny light by the Full Power switch which on my 1991 I have eliminated the secondaries

Hi Dynomite,

I remove all these, plus I install a chip from Marc Haibeck, and that's it? And when I'll be done, I simply block the vacuum nipples from the plenum?



What will happen performance-wise if I remove the system? There will be no more difference between "Normal" mode and "Full" mode?

I own a '91.

Thanks!

[We Gone]

Originally Posted by Dynomite

I am the Contrarian here

I love the Secondary System operating and it is very easy to maintain if you block TB Coolant at the Injector Housing ending up with the 10 minute Plenum Removal.

I really like the FULL ENGINE POWER light on the panel on the 1990s. On the 1991 you only have the green tiny light by the Full Power switch which on my 1991 I have eliminated the secondaries

because...because on the 1991s they eliminated the FULL ENGINE POWER light on the panel

Makes me wounder what it would take to add an operating bulb to the dic of the 91-up???, Could you tie it to the switch light or even to come on when the sec are open...?

[Dynomite]

Originally Posted by We Gone

Makes me wounder what it would take to add an operating bulb to the dic of the 91-up???, Could you tie it to the switch light or even to come on when the sec are open...?

You guys are missing out on the best interior feature that exists on the 1990s

Originally Posted by MuRCieLaGo

Hi Dynomite,

I remove all these, plus I install a chip from Marc Haibeck, and that's it? And when I'll be done, I simply block the vacuum nipples from the plenum?
What will happen performance-wise if I remove the system? There will be no more difference between "Normal" mode and "Full" mode?
I own a '91.
Thanks!

You do not need to block the passenger side vacuum nipples from/to the Plenum (you block the Drivers side vacuum nipple between the Plenum Runners only). That vacuum nipple on the passenger side of Plenum is Cruise control and HVAC which you leave in place.

Your tiny green light will stay on all the time by the Full power switch (Haibeck Chip secondaries removed) and you are ALWAYS on FULL ENGINE POWER Mode.

See Item #2 Vacuum Systems 90' and 91' (Secondary and Cruize/HVAC)

This is a 1991 with Plenum Vacuum Drivers Side Blocked

[Paul Workman]

Like many of the "FBI" gang, I removed my SPTs - the entire harness, butterflies, throttle rods, pump, vacuum lines - everything. Maybe someone has the # handy for the Dorman freeze plugs that are inserted in place of the throttle rod bearings. (And, for good measure, I put JB Weld around the edges of the plugs before I installed them for a permanent seal.)

I NEVER missed them for a single moment. The input valves both get washed constantly and so they don't have any coking buildup going on. And, talk about instant throttle response!

IMO, there is NOTHING not to like about pulling the dang things. However, it is a moot point now, as my "FBI" porting exceeds the stock diameter significantly.

Parts that don't exist never break. And, they don't cost much!

[MuRCieLaGo]

Alright so now I definitely have an issue regarding that failed pump. When I hold WOT in a hill for example, SES light comes on after a while until I reach the top of the hill.

I'd like to go ahead but I need to buy Haibeck's chip, and before I do that I'd like to put some headers and an exhaust system.

Is there someone with a used vacuum pump who would like to sell it? If I can't find one I'll store my car for winter time and do the removal of secondary system as a winter project.