Welcome to Just Commodores, a site specifically designed for all people who share the same passion as yourself.

New Posts Contact us

Just Commodores Forum Community

It takes just a moment to join our fantastic community

Register

[Buick] VR V6 in VNs1, teething troubles

savage1987

Donating Member
Joined
May 8, 2005
Messages
3,660
Reaction score
31
Points
48
Location
Townsville
Website
www.facebook.com
Members Ride
LS1 VN + WK Grange 0010 + HPW VX SS
Got an issue in my VN.. just put a VR V6 in it, fresh rebuild.. it idles fine, lovely even, but stutters under load. Seems to be dropping 1cyl under the slightest load.

All the ignition gear was used on the previous engine, same coil and DFI, same leads and plugs even..

I have tried 2 sets of plugs, an NGK 13 and an NGK 15, but no change.


Motor is stock apart from bolt ons.

Any ideas welcome, want this thing driving asap.
 

immortality

Can't live without smoky bacon!
Staff member
Joined
Apr 15, 2006
Messages
16,070
Reaction score
4,485
Points
113
Location
Sth Auck, NZ
Members Ride
HSV VS Senator, VX s2 Calais S/C
check all the connections, hoses etc. did you forget the MAP sensor hose by any chance?
 

delcowizzid

on holiday
Joined
Jul 8, 2008
Messages
6,993
Reaction score
433
Points
83
Location
NZ
Members Ride
в∞ѕтεכ √&
could be fuel pulse from not having that dampner.or it could be from running the vn tune.
 

delcowizzid

on holiday
Joined
Jul 8, 2008
Messages
6,993
Reaction score
433
Points
83
Location
NZ
Members Ride
в∞ѕтεכ √&
engine side of throttle butteryfly
 

savage1987

Donating Member
Joined
May 8, 2005
Messages
3,660
Reaction score
31
Points
48
Location
Townsville
Website
www.facebook.com
Members Ride
LS1 VN + WK Grange 0010 + HPW VX SS
OK have checked the TB and all connections there are present and secure

I removed the DFI/coil packs and scraped back the mounting surface for better earthing, also tidied up the earth strap to the DFI.


No change.
 

delcowizzid

on holiday
Joined
Jul 8, 2008
Messages
6,993
Reaction score
433
Points
83
Location
NZ
Members Ride
в∞ѕтεכ √&
could be to much timing on a fresh rebuilt engine is it a stock vn tune or a custom special from the vn.you need to get it sorted it wont bed in the rings to well without running right
 

immortality

Can't live without smoky bacon!
Staff member
Joined
Apr 15, 2006
Messages
16,070
Reaction score
4,485
Points
113
Location
Sth Auck, NZ
Members Ride
HSV VS Senator, VX s2 Calais S/C
are you sure the key was on the crankshaft snout before fitting the ballancer?

check fuel pressure, what do the plugs look like after it splutters?

checked fault codes?
 

Zuicider

Banned
Joined
Dec 17, 2005
Messages
1,740
Reaction score
18
Points
0
Location
Stonedville
Members Ride
Set of thongs
are you sure the key was on the crankshaft snout before fitting the ballancer?

check fuel pressure, what do the plugs look like after it splutters?

checked fault codes?
if the key wasnt on then the bottom timing sprocked would be spinning
 

savage1987

Donating Member
Joined
May 8, 2005
Messages
3,660
Reaction score
31
Points
48
Location
Townsville
Website
www.facebook.com
Members Ride
LS1 VN + WK Grange 0010 + HPW VX SS
Not sure how to check codes on VN.. someone tell me and I will do it. 90% sure there won't be any codes though, no engine light.


greenfoam tune from the VN, a safe enough tune for 91RON on a VN engine.. surely the extra 0.5 compression point wouldn't ruin it.. jason said it should run ok. He's mailed me a VR manual tune on a VN memcal anyway, just waiting on arrival

Will pull plugs after new ones go in, hard to tell with 2nd handies
 
Top