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G16b efi (in sierra) high idle

Tech Talk for Suzuki owners.

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dad
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Joined: Mon Dec 31, 2007 8:27 am
Location: sydney

G16b efi (in sierra) high idle

Post by dad »

Hey blokes,
I've had a g16b efi vitara donk in the zook for about a month now,
when installed and wired up, idle set just below 1000rpm when warm, but i noticed last trip that it was idling at 2500rpm.

Ive checked that the accelerator cable isn't jammed and has a bit of play at the throttle body.

I turned the idle down via an adjustment screw i was shown on the throttle body (or inlet manifold, im not sure off the top of my head).

The lowest idle i can get is 2000 rpm, which doesn't bother me so much, as its not DD, but im beginning to worry that it might be on limp mode?

Any pointers?
cheers, nic
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Post by ajsr »

have you checked the manifold and throttlebody for vaccum leaks?
spray all gaskets ,plug and piviots with carby clean while running.
85 high roof 1.3, 6.5 tc, air lockers,ruf and 34 swampers. yep its an ugly pos.
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Post by Hybrid »

Yep Í'd check all the vac hoses.
Sierra
2 inch RUF
G16A
Megasquirt Injection
30 inch BFGs
Vit P/S
4.9 T/C gears
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Post by joeblow »

do you have a working check engine light?
lwb 1.6efi,4sp auto,f&r airlockers,dual t/cases.custom coils.builder of ROAD LEGAL custom suzukis...and other stuff.
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dad
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Post by dad »

Yes, and the diagnostics plug is in the glovebox...

But, im not sure about this bridging pin business.
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dad
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Post by dad »

I will check for vacuum leaks, thanks
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Post by joeblow »

i ask because sometimes when the ecu is in limp mode it will give the engine a higher rpm.
lwb 1.6efi,4sp auto,f&r airlockers,dual t/cases.custom coils.builder of ROAD LEGAL custom suzukis...and other stuff.
CAD modelling-TECH drawings-DXF preparation.
http://www.auszookers.com/index.php
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dad
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Location: sydney

Post by dad »

joeblow wrote:i ask because sometimes when the ecu is in limp mode it will give the engine a higher rpm.
Thats what i was suspecting. Im really hoping for a vacuum leak at the moment.. ill check it out tomorrow and report back to the oracle.
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Post by danssurf82 »

ha ha u r limp...

u might need to get a vacume pump to fix your limpness
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dad
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Post by dad »

So i checked for any vacuum leaks on the weekend with a can of carby cleaner, didnt seem to have any.

Had a play with air flow meter, o2 sensor, etc, to see if any plugs had come loose, but all seemed ok.

Took the car out for a play, 100m into the track, idle dropped back to where it supposed to be.

I dont know what caused the problem, dont know what fixed it. I guess what i dont know cant hurt me...
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Post by PCRman »

I wonder if your IAC valve had a clog. That might jam what passes for a choke in a g16b on and cause a high idle until the blockage was disloged.

If it does it agian you could try pulling the IAC valve of and give it a clean and flush the cooling system.

Or just put some flora pro-active in your radiator, hey if it works on blockages in people...

Also its a long shot but if you take your TPS off and check its clean, adjusted and performing correctly.
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