2G Fuel injectors not firing

[dsmGSTtuner]

The relays are working fine and the resistor pack is in the perfect ohm range. There is fuel to the fuel rail as well. It's also in timing perfectly. I'm getting spark but I'm not getting the injectors to fire.

Any help?

 

[wrencher]

Not easy to diagnose the injector drivers in the ECU/PCM without some special equiptment.
But if you have a power to the injectors & the PCM's not grounding them to pulse the injectors, you likely have a PCM issue.
From the crank & cam sensor signals it triggers the igntion transistor & the injectors.
Make sure your power supply side doesn't have a voltage drop under load (injectors firing)

 

[dsmGSTtuner]

the caps in my ecu are bad!!! haha thanks bro

 

[dsmGSTtuner]

i thought i had this solved but i dont
i checked the relays, the injector resistor, and ecu. all of them are working fine. is there a fuse somewhere thats for the injectors? fuel is getting to the rail and there is fuel pressure and spark. the injectors just are firing out the fuel. please help me

 

[bryanwheat]

Do the injectors have power going to them with the key on? IS so than check continuity from the ecu trigger wires to the ecu. If that is good and the ecu is good than you likely have a problem with the cam or crank sensor, or wiring for them.

 

[92AWDHX40]

Pull the ecu out and check for damage, wiring can also be a culprit in your problem, i would check the connections at the injector plugs.

 

[dsmGSTtuner]

im getting power to the injectors. i checked them with a test light. also i changed my ecu out. i have a rebuilt 95/96 in it now.

 

[92AWDHX40]

Sounds like a possible wiring issue, if the ecu you have now is good, check plugs, and wires.

 

[bryanwheat]

Check all the grounds in the ecu harness also. The ecu grounds out the injector circuit to fire the injectors. If there is a broken ground wire than the ecu won't be able to ground the circuit. Get a digital multimeter and check all grounds in the harness for continuity to ground. If all are good than test continuity from all wires to ecu from injectors than check the wires for the cam and crank sensors.

 

[92AWDHX40]

So it comes down to checking your wiring issue, shouldnt be that difficult to track down, once you have found your a possible short, you would be surprised on the simple things we look over, or mistakes, we all make. Multimeter are cheap at harbor frieght seems i have two for various wiring projects with cars, and around the house.

 

[bryanwheat]

So it comes down to checking your wiring issue, shouldnt be that difficult to track down, once you have found your a possible short, you would be surprised on the simple things we look over, or mistakes, we all make. Multimeter are cheap at harbor frieght seems i have two for various wiring projects with cars, and around the house.

My 3 dollar harbor freight multimeter is one of the best tools in my box, .

 

[dsmGSTtuner]

What do the ground in the ECU harness look like? What color?

 

[bryanwheat]

They should mostly be black. I would find a schematic so that you would know exactly what pins to test.

 

[dsmGSTtuner]

Every single fuel injector was clogged! I changed out all the injectors and they were squirting out fuel like a mad man!!!

Thanks for the help guys!