G40 stalling/idle problem.

Started by cheddarcheese, July 07, 2009, 03:38:41 PM

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cheddarcheese



i can get my G to idle  and if i accelerate threw the rev range its fine but i let it go to idle or i let my foot of the accelerator the revs drop way below 500rpm and stalls even if i hold the revs at around 1500rpm and let of the accelerator it still tries to stall and stalls. the only way i can get it to idle is if i bring the revs down slow.

They engine has been sat in a unit for a year or so before i installing it and has a brand new alternator.

any ideas

cheers


vwmk3jon

Almost what mines doing now! Pain in the f****** arse!

Interested to see what people say on this.

cheddarcheese

I just cleaned the idle control valve. no different.
Changed coil. no different.

hayesey


cheddarcheese

ECU with fitted PSD chip
G40 charger full blend
68mm pulley
G40 manifold Decat and Strait threw exhaust
Dewedged throttle body
boost return removed

hayesey

when it does idle, what rpm does it idle at?

might also be worth making sure that the holes in the throttle plate aren't leaking.

vwmk3jon

What would you suggest hayesey if i was running a standard t/b?

GAF2

mines exactly the same got a second hand isv but dont know if i will bother now if it never worked for you, when it does idle hayesey it sits about 1000rpm.  Could you explain a bit more about this throttle plate.

cheers guys

cheddarcheese

#8
when it idles its about 1000rpm. i have no idea what to look at when it comes to to the throttle body as it was apparently a Dewedged throttle body when i brought the engine.

any pictures links?

i do have the opportunity to pinch some parts from my m8's none running G due to Charger oil seals gone just to see if any parts are fecked.

hayesey

jon - your problem could just be down to needing remapping.  Hard to say really, could do with knowing what the fuelling is like when it happens.  I had similar issues with mine when it was too lean at idle.

this is a picture of a throttle body:



those screws on the throttle plate hold the wedges on, when you remove the wedges these holes need sealing up or it wont idle properly. 


cheddarcheese

by looking at that i think mine is a standard throttle body .

hayesey

so does it still have the wedges on the throttle plate or is the plate just flat?

cheddarcheese


vwmk3jon

yeah, i should think the lack of BVH & aquamist doesnt help when the chips suited to it.

polo classic

Yeah that will make the engine run lean down low