Injectors dont pulse whats the issue

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Jul 3, 2010 | 09:41 PM

sszcam

Thread Starter

Junior Member

Joined: Mar 2005

Posts: 15

Likes: 0

Car: 00 ss 89 iroc lt1

Engine: ls1, lt1

Transmission: M6, auto

Injectors dont pulse whats the issue

I am wrapping up my Lt1 install and cannot get the car to run. I know I have fuel to the rails and have spark. THe car will fire off if carb cleaner is sprayed in the tb.

My question is what sensors or other things control the injectors?

THe harness that I used is a standalone unit so I didnt have to splice many wires and none specifically for the injectors.

Jul 3, 2010 | 10:27 PM

Klortho

Supreme Member

Joined: May 2004

Posts: 2,924

Likes: 1

From: Kingston, Tn

Car: 1987 GTA

Engine: LT1

Transmission: T56

Axle/Gears: 9 bolt 3.70 posi

Re: Injectors dont pulse whats the issue

Gotta have power to the injectors, or they won't work right.

Jul 4, 2010 | 06:12 PM

sszcam

Thread Starter

Junior Member

Joined: Mar 2005

Posts: 15

Likes: 0

Car: 00 ss 89 iroc lt1

Engine: ls1, lt1

Transmission: M6, auto

Re: Injectors dont pulse whats the issue

If the harness is getting power to supply spark and fuel why wouldnt it be getting power to the injectors?

Where do I start what do I need to rule out.

Jul 4, 2010 | 07:41 PM

Ace

Member

iTrader: (2)

Joined: Sep 1999

Posts: 384

Likes: 2

From: Canada

Car: 92 quasar gta

Engine: Nothing

Transmission: Nothing

Axle/Gears: 4.11s

Re: Injectors dont pulse whats the issue

injectors run seperate +12v from the ignition and pump..

theres +12v from the pink/black wires usually (pink to 7.5A for LT1 per bank, looked it up) and then the ECM does the grounding.

VATs can disable it too