2004 Trailblazer EXT. So I cranked my turdblazer up and it barely ever so slightly stumbled and then ran fine for about 5 minutes. Got halfway up the neighborhood and it just died like it ran out of gas, but had plenty of gas.
I've been trying to diagnose this problem the right way without just throwing parts at it but I'm currently stumped so I am making my first post on here. I've searched and searched online but I couldn't find anything specifically about the voltage from the PCM to the relay being low.
I watched a few of May03LT's videos to get to where I am now.
At the fuel pump relay, my constant voltage supply pin is good, my ground pin is good. With the key on the voltage supply from the PCM is only 7 volts. Per May03LT's video, this voltage supply from the PCM should read 12 volts with the key on. Whenever I bypass the relay and straight wire it, the fuel pump kicks on and it starts up and runs perfectly fine.
It's been throwing a few different codes but it has been running fine with these confirmed codes so I haven't fixed the issues yet. I'm wondering if the issues with these codes have told the PCM to stop sending full voltage to the relay; however, this doesn't seem to be the case because it has been running with these codes already. But anyways, the codes are P0013 & P0014, exhaust camshaft position actuator/timing and also P0128, thermostat coolant temp below thermostat regulating temp.
I had a spare ignition switch which I tried but this didn't change anything.
I've checked every fuse, all are good.
I greatly appreciate any help out.
Thanks,
Ryan
I've been trying to diagnose this problem the right way without just throwing parts at it but I'm currently stumped so I am making my first post on here. I've searched and searched online but I couldn't find anything specifically about the voltage from the PCM to the relay being low.
I watched a few of May03LT's videos to get to where I am now.
At the fuel pump relay, my constant voltage supply pin is good, my ground pin is good. With the key on the voltage supply from the PCM is only 7 volts. Per May03LT's video, this voltage supply from the PCM should read 12 volts with the key on. Whenever I bypass the relay and straight wire it, the fuel pump kicks on and it starts up and runs perfectly fine.
It's been throwing a few different codes but it has been running fine with these confirmed codes so I haven't fixed the issues yet. I'm wondering if the issues with these codes have told the PCM to stop sending full voltage to the relay; however, this doesn't seem to be the case because it has been running with these codes already. But anyways, the codes are P0013 & P0014, exhaust camshaft position actuator/timing and also P0128, thermostat coolant temp below thermostat regulating temp.
I had a spare ignition switch which I tried but this didn't change anything.
I've checked every fuse, all are good.
I greatly appreciate any help out.
Thanks,
Ryan