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Location:
Perth
Registered:
May 2005
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20v idle (can it be adjusted)???
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Thu, 08 September 2005 05:01
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Hey guys jsut went over the pits and the dickhead said my blacktop is idling too high? 1000rpm. he said its ment to be at 600????? he said there is a screw somewhere on the throttle body that can adjust it??? is this true? I thought the ECU controlled the idle whats everyone else idling at?
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: 20v idle (can it be adjusted)???
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Thu, 08 September 2005 05:32
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ECU can only control the idle speed with in a certain range.
Make sure the throttle butterfly is completely closed, and the TPS is in IDL with the car at rest.
If the TPS isn't in IDL, the ecu doesn't know to make the car idle at the set idle point.
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Location:
Perth
Registered:
May 2005
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Re: 20v idle (can it be adjusted)???
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Thu, 08 September 2005 08:05
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whats TPS and IDL?
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Location:
sydney
Registered:
March 2003
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Re: 20v idle (can it be adjusted)???
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Thu, 08 September 2005 11:01
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20vs can be a pain sometimes with the idle
stuff like the electrical load and the a/c signals to the ecu can play havoc
there is afew things that might work but every 20v is diff to the others i find
another way is to remove intake plenum
and adjust the 4 small idle screws same amount in say about 1 full turn then put it back and see if dile adjusts
if not then the ecu is gettin a false signal somehwere which inturn stuffs up the idle motor adjustment
about 1 in 10 20vs i wire up sometimes has this prob
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Location:
Tasmania
Registered:
May 2002
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Re: 20v idle (can it be adjusted)???
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Thu, 08 September 2005 13:04
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There are quite a few vacuum hoses going to different places on the 20 valve. Make sure they are blocked off if not being used, and if they are connected make sure you understand exactly why and what the thing does. The only one you realy need to run is a big hose from either no.1 or no.4 to the brake booster. A air leak may cause a higher idle.
If you run the factory ECU, it will be controling the idle stepper motor, positioned under No.4 throttle.
If none of that is used and everything is blocked off... make sure the throttles are closed. There are stopper and adjusting screws on each thottle (under each throttle) but from the factory these are often not even touching, allowing the throttles to fully close.
Then adjust the idle with the air screws, using a flat blade at the top/front face of each throttle. Turn the same amount on each.
If its a full factory setup, I doubt you will have to play with the TPS.
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