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Username Post: No power on injectors Help..        (Topic#313603)
Forum Newbie
Posts: 1

Age: 28
Reg: 07-13-14
07-13-14 03:17 AM - Post#2468664    

Hey everyone, I am new to this site. Okay, my problem is I don't get any voltage on both injectors when key is on and no ground on ecm as well.

Here's my story, the passenger side injector used to be working fine which I get voltage and ground. Not until when i decided to swap the good connector to the bad connector and plugged to the injector which is on the driver side.

I unplugged the four wires that goes to dist. (ICM) purple/white terminal and used a test light to make it touch and untouch the purple/white terminal the driver side injector sprayed out gas.

Now when I plugged the working connector back to the passenger side injector and tested for voltage and ground it's no longer getting any power? I don't know what went wrong.. I really hope you guys can help me out


Edited by LYNKS on 07-13-14 03:19 AM. Reason for edit: No reason given.

Senior Member
Posts: 457

Loc: Tracy, CA
Reg: 07-18-00
07-15-14 05:04 PM - Post#2469372    
    In response to LYNKS

If you don't get an answer on this forum, visit the link below and do a search for your particular issue:

There's a TBI specific board that should be of some help. There's a lot of 3rd Gen Camaro traffic there as well.

1987 IROC-Z 5.0L
1992 Lumina Euro 3.1L
2003 GMC Safari

Subject Matter Expert - Senior Member
Posts: 3863
Loc: Twin Cities, Minnesota, U...
Reg: 04-25-04
07-15-14 06:18 PM - Post#2469394    
    In response to LYNKS

Check the fuses in the fuse box. There should be a fuse for the injectors.

A common problem is wire damage where the injectors wires are right at the bottom of the collar that sets on top of the TBI unit. Right at, or outside, the grommet for the TBI, the wires can break or crack and short to each other, blowing the fuse.

You could also test the resistance of the injectors with an ohm meter.
At an ambient temperature of 20c the resistance of a TBI injector should be 1-2ohms.
A typically reading would be 1.2 to 1.3 Ohms

Injector resistance specs are published at room temperature or 68 degrees Fahrenheit unless otherwise noted.

Welcome to the board!

For those of you that are wondering why you are not getting replies to your thread:

Did you give the model, year, engine, fuel system type, and transmission information?

If your vehicle has been altered from stock, let us know about that too.

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