Quote:
Originally Posted by MuRCieLaGo
Hi,
My '91 ZR-1 got a vacuum leak. Key on, the vacuum pump turns on every seconds or so.
-Blocked the vacuum port directly on the pump - stops running (so the pump is fine).
-PCV valve was loose so I fixed it by installing vinyl sleeves.
-I tightened a lot of hoses - most of them were loose.
I'm very afraid of pulling the plenum now. Especially because I don't want to spread antifreeze everywhere.
Can I say goodbye to my vacuum problem if I remove the secondary system? If I do so, I will order a chip from Haibeck. Will I be able to switch to normal mode or I will be locked to Full Power?
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Finding A Vacuum Leak
Full power all the time with secondaries removed. I would just remove the plenum (block TB Coolant when you are there) and find/fix the vacuum leak. Just drain a gallon or so of coolant and remove the Plenum.
Removing Plenum (including the 10 minute Plenum Removal)
Injector Housing TB Coolant Blocking
You can also Block TB Coolant without removing the Injector Housings but do have to remove the two Injector Housing Coolant Manifolds just to keep the aluminum shavings out of the coolant system.
Here we go again....if you do remove the Plenum....might as well remove the Ignition Coils and starter. You can then recondition the Starter Solenoid......and clean the Valley Drain.