G40 stalling/idle problem.

cheddarcheese · July 07, 2009, 03:38:41 PM

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 · July 07, 2009, 04:31:11 PM

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

Interested to see what people say on this.

cheddarcheese · July 07, 2009, 07:09:32 PM

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

hayesey · July 07, 2009, 07:14:26 PM

what's the spec of the engine?

cheddarcheese · July 07, 2009, 07:21:10 PM

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 · July 07, 2009, 07:32:40 PM

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 · July 07, 2009, 07:37:14 PM

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

GAF2 · July 07, 2009, 07:40:12 PM

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 · July 07, 2009, 07:43:27 PM

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 · July 07, 2009, 08:30:33 PM

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 · July 07, 2009, 08:34:55 PM

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

hayesey · July 07, 2009, 08:36:45 PM

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

cheddarcheese · July 07, 2009, 08:44:09 PM

it still has the wedges.

vwmk3jon · July 07, 2009, 09:16:18 PM

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

polo classic · July 08, 2009, 09:46:58 AM

Yeah that will make the engine run lean down low