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#1 |
Join Date: Jul 2009
Location: Texas
Posts: 790
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I know there is one behind the intake near the firewall. But I was referring to the one under the computer and above the battery.
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#2 |
![]() Join Date: Jan 2009
Location: Portland Oregon metro area (Washington side)
Posts: 3,193
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I think that is the vacuum sensor for the secondaries.
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Scott ![]() Vett owner since 1979._It's about the car and the people |
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#3 |
Join Date: Jul 2009
Location: Texas
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#4 |
![]() Join Date: Jan 2009
Location: Portland Oregon metro area (Washington side)
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I have no idea but I do know the only time I've even heard of a MAP sensor failing was when the inlet tube broke off.
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Scott ![]() Vett owner since 1979._It's about the car and the people |
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#5 | |
Join Date: Jul 2009
Location: Texas
Posts: 790
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Dave Last edited by mgbrv8; 03-06-2013 at 08:00 AM. |
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#6 |
![]() Join Date: Jan 2009
Location: Portland Oregon metro area (Washington side)
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On page 6E3 A-4 of the 90 FSM it is called a "Vacuum Sensor" and feeds the "Secondary Port Throttle Valve Vacuum Sensor Signal" line to the ECM. I've never heard of one of these failing.
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Scott ![]() Vett owner since 1979._It's about the car and the people |
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#7 | |
![]() Join Date: Dec 2003
Location: Arcadia, OK
Posts: 3,404
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We stock both sensors. If you want to see them, go to the web store & search by the PN's. You can tell them apart visually if you know what to look for. ![]()
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Jerry Downey JERRYS LT5 GASKETS & PARTS http://www.jerrysgaskets.com 1994 ZR-1, Black/Black, Lingenfelter Aerobody, 416cu in, 3.91 gears, coil-over susp, Brembo brakes, etc. 2016 Black-Red, 3LT-Z51 Auto 8-speed. |
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#8 | |
Join Date: Jul 2009
Location: Texas
Posts: 790
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Jerry thank you, in your professional opinion Jerry should the oily map be changed out or should it be fine? Also is this normal to get oil up there or is this caused by another problem in the system? The engine has 80k great compression and no blow by. Also thank you Jerry for gettin the fuel systems orings to my door so quickly. Dave ![]() |
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#9 |
![]() Join Date: Dec 2003
Location: Arcadia, OK
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The oil you are seeing is normal, comes to the plenum via the PCV system when crankcase pressure is at its greatest.... WOT/high rpm. The LT5 unique PCV system with it's dual PCV valves was the result of crankcase pressure experience during development. After playing hard and being shut down for awhile, oil in the plenum will sometimes cause a puff of smoke on startup, due entirely to oil draining down the plenum runners.
I've never installed an oil catch can, but do think it is a good idea. Keeping oil out of the intake is always a good idea. I wouldn't be concerned about the oily residue. It's only a problem if it collects in the hose and interferes with the vacuum sensing.
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Jerry Downey JERRYS LT5 GASKETS & PARTS http://www.jerrysgaskets.com 1994 ZR-1, Black/Black, Lingenfelter Aerobody, 416cu in, 3.91 gears, coil-over susp, Brembo brakes, etc. 2016 Black-Red, 3LT-Z51 Auto 8-speed. |
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#10 | |
![]() Join Date: Jan 2009
Location: Portland Oregon metro area (Washington side)
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Early engine development discovered in a catastrophic way that ice can build then release into the heads. Depends on environmental conditions of course. To "burp" the coolant simply leave the driver's side TB hose pointing up as you fill the coolant reservoir. When you see a bit of coolant come out of the TB you're done. No blowing the LT5 needed. ![]()
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Scott ![]() Vett owner since 1979._It's about the car and the people |
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