injector firing?

Reply Subscribe

Thread Tools

Search this Thread

11-23-2005, 07:29 PM

overZealous1

Registered User

Thread Starter

iTrader: (27)

Join Date: Sep 2004

Location: tigard oregon

Posts: 4,268

Likes: 0

Received 1 Like on 1 Post

injector firing?

anyone know off hand how the vq fires the injectors. is it batch fire or all sequential? save me some time to check if someone knows.

Reply Like

11-24-2005, 06:17 AM

KPierson

Banned

iTrader: (1)

Join Date: Feb 2004

Location: Dayton, OH

Posts: 2,128

Likes: 0

Received 0 Likes on 0 Posts

When the car starts it does batch injections, all six injectors fire at the same time (6 times per revolution). Once the car is started and running they fire sequentially (each injector fires one time per revolution).

If the car drops in the 'limp' mode the injectors will fire at the same time again, but I believe they will fire twice per cylinder (12 times per revolution). This is why the car runs really bad!

Reply Like

11-24-2005, 07:45 AM

overZealous1

Registered User

Thread Starter

iTrader: (27)

Join Date: Sep 2004

Location: tigard oregon

Posts: 4,268

Likes: 0

Received 1 Like on 1 Post

thanks for the info kevin!

Reply Like

11-26-2005, 07:51 AM

Sharif@Forged

Sponsor
Forged Performance

iTrader: (92)

Join Date: Dec 2003

Location: Marietta, GA

Posts: 13,733

Likes: 0

Received 1 Like on 1 Post

Sequential...for purposes of tuning and things like that. Most modern EFI systems use sequential fuel injection.

Kevin is right....good recall...batch on start up....but I cant remember if its just cold start or all start.