Wednesday 26 October 2011

What would I check if my fuel injectors arent getting power?

I have a 87 chevy custom deluxe 20. My truck wont start. It does crank it is just not getting any gas. It will start up for a second if I put some starting fluid in there. I changed the fuel filter, It is getting gas to the throttle body, fuses are good. I checked it with a light and on both fuel injectors nothing happens when you try to start it, I checked both contacts on the injectors. What would my next step be? Please be specific. And in what order should I diagnose in? Thank you very much.



Please only answer if you know what you are talking about.What would I check if my fuel injectors arent getting power?Does that truck have throttle body injection?. If it does than it could mean the the PCM is bad for the injectors the PCM will only control the two injectors on the throttle body. I would also try to listen for the fuel pump if you don't hear it when you turn the key than its bad. If its and electric pump and not a mechanical pump.
What would I check if my fuel injectors arent getting power?
find out if it has injector pules if not look for the ignition module
What would I check if my fuel injectors arent getting power?
i definitely know what i'm talking about. you're gonna want to use a test light and probe the injector power feed circuit with the test lamp connected to a good ground. turn the key on and you should have juice to the power wire. if the fuse and wiring is good, you will have an illuminated test lamp. after you've verified good power, hook a noid light up to the connector and have an assistant crank it over while you look at the noid light. it should flash rapidly as the assistant cranks it. if it does not, you have a ground issue going into the computer. if it does flash, you've got some bad injector(s) that aren't energizing as they should.