What would cause my fuel injectors to not fire?

 

Have your checked your EGI fuse and relay?

 

They checked out good.

 

Have you tested to verify you are getting voltage at the injectors? Also, exactly how do you know they aren't firing?

 

Are they newly cleaned/flowtested? You might have to cycle them with voltage to unstick them.

 

Well, there's pressure in the lines. I also poured a little gas down the intake and it kicked. I had them cleaned and I put a new 5 spd wiring harness in to replace the hacked up automatic one.

 

How would I go about doing that?

 

Hit them with 12v. When you do, they should click which will let you know if they are opening or not.

 

I had a problem with my injectors getting stuck after I just got them cleaned and flowbenched. It has to do with the cleaning procedure/agents used. I got mine working again by alligator clipping one pin of the injector connector (injector side) to the negative battery terminal. I then set up a lead to the other injector connector and was able to cycle the injector on an off by touching that lead to the positive side of the battery. Don't hold it on there but instead just tap it like you're playing the drums with that wire and the positive battery terminal. If you don't hear a very audible "Click" when you apply voltage, try tapping on top of the injector with a 10mm wrench. Do this routine of lightly banging on top of the injector while cycling the injector on an off and it should open up after a few tries. I had a post about this back about 6 months ago. I'll see if I can find it for you later on today.

 

Thanks for the prompt help guys, I'll post up later if this works.

 

All four injectors checked out. It kicked for a second but then right back to no injection. Any other ideas?

 

If they are indeed opening when your jumping voltage to them, then it's a harness/ECU/Fuel problem and I don't really know what to say. Have you verified fuel pressure going into the rail?

 

Everything else checks out so it's definitely a harness/ecu problem. This really sucks because the wiring harness is brand spankin new.

 

I seriously doubt its a harness issue if you are getting voltage at the fuel injector connectors. It is possible that the injectors click on/off, but are clogged with the cleaning solutions. How long did you hold onto the injectors after having them cleaned before they were installed into the car?

I had a similar issue and ended up getting a second set of injectors, having them cleaned and installed them as soon as they arrived.

 

Maybe bad crank signal? When you're cranking, does your tach work?

 

I jumped the injectors with the harness connectors off and they let enough fuel out to let the motor kick for a second. But when I have them wired to the ecu they don't do anything. You could be right, but I'm thinking there may be a wiring issue.

 

You did check the voltage coming from the harness connectors, right?

 

No. What is the exact procedure for testing that?