vk4akp
Starfire, Fear V Power!!
- Joined
- Dec 1, 2008
- Messages
- 202
- Reaction score
- 5
- Points
- 18
- Age
- 57
- Location
- Ipswich / Queensland / Australia
- Website
- shazam.zapto.org
- Members Ride
- 2004 VY2 - Commodore Wagon,VC Commodore (Starfire)
Hi, One of my 2004 VY2 V6 Wagons has had a rough idle right from when I bought it. (I'm 3rd owner).
History of the car is it is an Ex Gov Police Spec vehicle. (Ex QAS rural fast response vehicle)
2nd owner had 3 different LPG conversions done to it in his time as owner and was never happy. Sold the car to me with the LPG removed. I note one of the conversion types involved drilling into the inlet manifold to add additional LPG injection points. These holes have been plugged with bolts. I have sprayed them with CRC to look for vacuum leaks but all looks good.
However I believe it was never setup correctly again for petrol.
It had LPG plugs still fitted for starters. Once replaced with the correct NKG Iridiums the fuel economy and idle improved dramatically.
However it still idles rough and as specially when turning the wheel to park or reverse it tends to stumble and recover often causing the car to lurch a bit which is not safe really when trying to park. The power steering drag tends to make it worse.
The idle seems to be set for 650 RPM.
I have adjusted the butterfly by one additional half turn in (opened further) which helped a lot. I know we are not supposed to touch this setting but the red cap was gone and there was white thread lock on the adjustment screw. So I have assumed that they had played with this setting for LPG use.
I have an ALDL interface and TunerPro. It says target idle in the ECU is set to 650 RPM.
Now my questions for the Guru's.
- What is the correct idle setting for this car?
- How is the idle set?
- Is there anything in the ECU (computer) flash that can be set or changed for the idle setting?
- I did wonder if the sticker on top of the radiator contained any useful information? It has fallen off of both of my VY2 Wagons unfortunately. (Anyone got a photo of one?)
Any help appreciated.
.-.-.
History of the car is it is an Ex Gov Police Spec vehicle. (Ex QAS rural fast response vehicle)
2nd owner had 3 different LPG conversions done to it in his time as owner and was never happy. Sold the car to me with the LPG removed. I note one of the conversion types involved drilling into the inlet manifold to add additional LPG injection points. These holes have been plugged with bolts. I have sprayed them with CRC to look for vacuum leaks but all looks good.
However I believe it was never setup correctly again for petrol.
It had LPG plugs still fitted for starters. Once replaced with the correct NKG Iridiums the fuel economy and idle improved dramatically.
However it still idles rough and as specially when turning the wheel to park or reverse it tends to stumble and recover often causing the car to lurch a bit which is not safe really when trying to park. The power steering drag tends to make it worse.
The idle seems to be set for 650 RPM.
I have adjusted the butterfly by one additional half turn in (opened further) which helped a lot. I know we are not supposed to touch this setting but the red cap was gone and there was white thread lock on the adjustment screw. So I have assumed that they had played with this setting for LPG use.
I have an ALDL interface and TunerPro. It says target idle in the ECU is set to 650 RPM.
Now my questions for the Guru's.
- What is the correct idle setting for this car?
- How is the idle set?
- Is there anything in the ECU (computer) flash that can be set or changed for the idle setting?
- I did wonder if the sticker on top of the radiator contained any useful information? It has fallen off of both of my VY2 Wagons unfortunately. (Anyone got a photo of one?)
Any help appreciated.
.-.-.