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Model specific boards => Golf mk2 => Topic started by: drivebycar on 14 October 2008, 12:01
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Hello!
So I started tuning my car last night a la rubjonnys guide.
First things first the idle is going up and down and up and down between 750 and 1000rpm, which makes it very hard to get the idle and co2 just right! Is this the ISV?
also while I was doing it, the CO2 screw didnt seem to make alot of difference when winding it in. I was winding it in to wait for the engine to sound rough, but never really got to that point, so was a bit clueless really as I didnt have alot to work with! Anyway I set it up and went for a drive, then it stalled when I put my foot down on the clutch. So re-adjusted the co2 and idle to make it run.
I know for a fact the dizzy has been advanced, so would that be causing these problems or is it likely to be something else? I am planning on putting the dizzy back to standard and checking the other timing tonight.
Thanks :smiley:
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Did you disconnect the ISV circuit at the coil ? (Red wire)
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No? Should I have done?
I was following rubjonnys guide.
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Do you have an 8v or a 16v? If 8v, check the idle switch. you should hear it click when the throttle is shut, also check the wiring to it behind the throttle body it often snaps here. This will cause the idle to be uneven and the car to stall occasionally when you dip the clutch. Once thats sorted reset the ignition timing to the factory settings, set the idle back to 900 then see where that gets you on the CO front.
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Yeah it is an 8v. where abouts is the idle switch and what does it look like?
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its underneath the throttle body, cant really get to it without taking the inlet boot off!
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How hard is that? Would I haveto take off the inlet manifold?
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No just the rubber boot.
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Ok so not that hard then :laugh:
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if you know the pointy end of a screwdriver from the blunt end no not hard :grin:
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Just about :laugh:
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Well its clicking when I move the throttle away from closed and back to closed so I assume its working, also the wiring doesnt look like there are any problems...
Next idea please? :embarassed:
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replace all your vacum hose's make alot more of a different when they are brand new with no fraying atall.
plus if you have a k and n replace it all back to standard.
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Ive got a standard airbox, k&n's are for chavs :evil:
Ill check for leaks...
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I checked for leaks all seems to be good, also took the isv out and gave it a bit of a clean, which has helped things a bit.
When I started it it was running a bit smoother and the idle wasn't really jumping about.
So I am going to try and sort the Co2 and idle screw now and see where I get to :wink:....
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ok, other thing to check is the throttle shuts right up against the throttle stop :)
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Ok, so I get it al nice and running smoothly, so reconnect the coolant sensor and put everything back together. Start the car up and the idle bouncing is back again, only this time when it goes low the car almost cuts out!!! :angry:
So I have to readjust the idle/CO2 to make sure it doesnt cut out.
I think im going to have to check over the timing and dizzy advance first, would this cause these problems if they weren't correct?
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hmm, is the blue sender new? worth swapping it if not not spensive from vw either!
edit: oh and a quick n dirty test of the throttle switch system, hold it just off idle at around 1.5k, then press the switch on top of the throttle body. the revs should drop, then rise back up again when you release it :)
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The temp sender isnt new, but when I unplug it it effects the revs.
Pretty sure the throttle switches are workign as well as I had a play with them last night.
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Did you disconnect the ISV circuit at the coil ? (Red wire)
Sorry, my advice only applies to the 16v. You didn't say which engine you was on about.
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Did you disconnect the ISV circuit at the coil ? (Red wire)
Sorry, my advice only applies to the 16v. You didn't say which engine you was on about.
no probs :smiley: