My 88 iroc 5.7 turns off as I come to a stop, I put the scanner on it and it reads code 54 but have no clue on what it is or how to fix the problem, my wife drives it to work and I'm worried about it getting her stranded somewhere. so I'm asking for some help from you guys. thank you in advance.

 

Code 54- The ecm monitors the voltage on the fuel pump circuit. If it sees a voltage of less than 2V for about 2 seconds, this code will be set. This can be set by a faulty charging system, but the most likely cause is either a loose or corroded connection in the fuel pump circuit.

 

Where is that circuit located? Engine compartment or towards gas tank?

 

fuel pump relay is on the driver side engine compartment. the wiring then goes back into the car and out the back bye the tank.

http://chevythunder.com/fuel_pump_code_54.htm

 

Going to check that sooner than later, I'll keep you posted on the results, thanks again.

 

Thanks for the help, their was corrosion on one of the wires for the fuel pump relay, fixed it and that solve my issue. thanks again man!

 

do you need my address and my favorite kinda beer ? That's great

 

I have a question I also need help with my fuel pump priming. The car won't prime, but after cranking for so long it will start and stay running. I did the fuel pump test, but i can't find the test connector where it tells me to put 12v. thank you for your help

 

some models this is omitted from the relay you might look at pin G of the aldl.


http://www.hotrodlane.cc/newtech/tun...elcircuit.html

http://www.austinthirdgen.org/index.php?pid=35

 

The pump runs. Now here another question haha.... Is the dark green wire from the relay suppose to be getting continuous power when the ignition is on and I'm not getting power to the tan/white wire?

 

Green/white 12v with key on for 4 seconds, with engine running it will be 12v

 

i'm getting continuous power to the green/white wire with the ignition on without the engine running.

 

is the fuel pump running continuos when the key is turned on? What ecm are you using 1228746 ?

 

the ecm i'm using is 16083401 and no the pump isn't running continuous. it just doesn't wanna prime

 

16083401 ? never seen that ecm ! I was going to find the ecm pinout. Are you sure your looking at the right relay you mentioned a tan/white Im not familiar with the wire color change on tpi vs tpi in these years.

 

my is a 88 305 tbi and it has a tan wire or tan and white not sure to dirty to see the color

 

Well I found out the problem, bad ecm.... ugh haha thanks for your help tho