Chevy truck stalling problem

[Jonathan]

I have 2000 model chevy truck 4×4 with the 5.3 motor and auto tansmission. The problem I am having the truck runs but just chokes out and dies, there is no fault codes. The truck idles fine, and when drove does good then it just dies with no apparent reason and it does this across the entire rpm range. I put my code reader and looked at the live data I didn’t see anything abnormal, but it did say there is CL fault with the fuel injection. I don’t know how to diagnose this issue any further any help would be much appreciated.

Topic

[James]

[Jonathan]

thanks I will try check the injector , but I did not notice any kind of misfire.

[James]

Did you find anything?

[Jonathan]

I found out why my truck quits, it is because it losses fuel pressure. It run fine at 50 psi then after a few second/ minutes it just drops in fuel pressure after about 15 psi it dies. I have put a new fuel pump in, but that has been a few months ago.

Now I got out figure out why my just loses pressure.

[Andrew Harris]

I hope you didn’t put an airtex fuel pump in it those are garbage. I would put a factory pump in it.

[Jonathan]

No airtex, but I did put a Delphi FG0053 Fuel Pump Module in. I done this because the fuel gauge did not read right because of the ” wiper thing (sorry not technical name ) attachted to float was bad. I don’t drive this truck much it is kinda just a old farm truck that I keep tagged, so that was big issue.

I did have to splice some wires for this fuel pump, so I am thinking a wire maybe coming undone. My plan is to solder them this time then so they can’t come undone.

Is there any checks I should do before I have up pick the bed?

[Andrew Harris]

I would just confirm that you have a good power and ground to the fuel pump while the pump is running. If you do then you have a bad pump. I put a Delphi pump in a truck once and it didn’t even pull off the rack because it was bad right out of the box. It can happen. Made me question myself.

[Jonathan]

Update:
Tested the connection on the fuel pump (with a test light) with it running and it lost power, then the truck died. I am thinking either a relay is went/ going bad or maybe a sensor telling it cut off. Help

[Jonathan]

10/26/16 I have put a new crank sensor in, and no go I am going to try replacing the pump now hopefully that will fix it

[Author]

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