Reply With QuoteIf the line at the top is not used for a MAP sensor, just blank it off. As you say the power steering pump needs to sense vacuum to increase force at idle speed for parking.
cheers Chuck.
Vacumn lines on 1G?
There are two lines which i have become a mystery for me after the conversion into the ra28. The engine runs well but i couldn't remember what to do with these lines. Help needed. They are visible in this photo, one comes off the IC piping, the other is bundled with it. It almost seems like they head down to where the Power Steering used to be?
RA28, 1GGTE, Gen 3.
http://www.toymods.net/forums/showthread.php?t=3778
Re: Vacumn lines on 1G?
If the line at the top is not used for a MAP sensor, just blank it off. As you say the power steering pump needs to sense vacuum to increase force at idle speed for parking.
cheers Chuck.
"What man can build, man can fix!"
MS51Crown Coupe,
GSV40R Aurion luxo tourer. One TA22 currently receiving some TLC prior to paint One RS56 Crown ute under construction, 2 x TA22's awaiting rebuilds. Toyota Crown RS47J ute in need of serious TLC. Toyota Crown Custom Wagon MS53 daily hauler stocko!
Re: Vacumn lines on 1G?
how does it determine RPM from vacuum?Originally Posted by ChuckLandwehr
and why would it need 2 lines?
the lines do go to the power steering pump but i always though it went on a pressure valve which bled a small amount of extra air into the engine(idle up) when the power steering line pressure was really high (ie on the stoppers).
basically to stop the engine stalling when you turn to 'lock'
hello
Re: Vacumn lines on 1G?
Brett is right, the PS pump has a 'vac switch' on the back of it that it opens when the PS pressure is high... (i.e. full lock). This can help stop the engine stalling when doing U turns etc.how does it determine RPM from vacuum?
the lines do go to the power steering pump but i always though it went on a pressure valve which bled a small amount of extra air into the engine(idle up) when the power steering line pressure was really high (ie on the stoppers).
basically to stop the engine stalling when you turn to 'lock'
The PS pump doesn't sense the vac, it simply bypasses the throttle body to make it idle up.
Cheers
Wilbo
Re: Vacumn lines on 1G?
wow!!! i think this just answered some weird behavior i encountered last week!!!
going through a round about....as i steered the engine lost all power...felt really heavy then it just sprung back to life!??
ill look over the line...thanxs guys
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