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vacuum help

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Old Dec 24, 2006 | 07:40 PM
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As for vacuum. I was driving today doing some part throttle tuning. Things were going good until it started running hella rich and stalling. limped it home and could hear a vacuum leak. I found a large vacuum port at the end of the intake manifold conected to a 6 wire sensor. wasn't leaking before and can't find a hose for it?


car is a 86.5 1jz 750cc, 2jz rail, afc, hks twin, wideband, and bunch of other odds and ends. I have built my own chevys and hondas so I am competant( I think?) when it comes to working on cars.
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Old Dec 24, 2006 | 09:30 PM
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Well I'm 99% sure JZ ECUs are MAP based..which would explain the sensor on the manifold.

Otherwise dunno, I'm tired and going to bed finally
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Old Dec 24, 2006 | 10:00 PM
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yup. map ecu. maybe I'll have better luck tomorrow?
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Old Dec 25, 2006 | 07:38 AM
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Here is the pic of the sensor with large vacuum port? any idea where the hose goes?
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Old Dec 25, 2006 | 11:32 AM
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turns out my ISC is bad. does anyone have a 1jz idle speed control valve they can sell?
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