Fuel Issues
#1
Fuel Issues
Hi everyone! New member but read all the time. Great information here.
Anyway, here is my problem. my sons mustang, 1998, 3.8L quit running about 2 months ago. After exhausting all electrical checks and speaking with the dealership I replaced the fuel pump and filter. Prior to this swap, the car would turn over but no fuel being sent to fuel rails. I check the power at the inertia switch and had power for about 2-3 seconds when key turned on but no sound from the fuel pump. I checked all fuses and relays and are ok. I replaced the fuel pump and filter. Now the pump cycles for about 1 second but no fuel is delivered. I disconnected the fuel filter and retried with same results. So at this point I don't know what to do. I am confused about the FPDM and the CCRM. I know what the CCRM is and how it is split into 4 relays but not sure what the FPDM does. Also, can you still get power to pump (as I hear it cycle) with a bad FPDM or CCRM? I have yet to put a multi tester to either one yet but about at wit's end! I have about 5 gallons back into the tank after replacing the fuel pump. Thanks
Anyway, here is my problem. my sons mustang, 1998, 3.8L quit running about 2 months ago. After exhausting all electrical checks and speaking with the dealership I replaced the fuel pump and filter. Prior to this swap, the car would turn over but no fuel being sent to fuel rails. I check the power at the inertia switch and had power for about 2-3 seconds when key turned on but no sound from the fuel pump. I checked all fuses and relays and are ok. I replaced the fuel pump and filter. Now the pump cycles for about 1 second but no fuel is delivered. I disconnected the fuel filter and retried with same results. So at this point I don't know what to do. I am confused about the FPDM and the CCRM. I know what the CCRM is and how it is split into 4 relays but not sure what the FPDM does. Also, can you still get power to pump (as I hear it cycle) with a bad FPDM or CCRM? I have yet to put a multi tester to either one yet but about at wit's end! I have about 5 gallons back into the tank after replacing the fuel pump. Thanks
#3
If the pump does cycle then it should be picking up gas as you say you do have 5 gallons in the tank so obviously its not empty. New filter so its not clogged. Its only going to cycle for just a second when you turn it on because its looking for oil pressure and shuts off when there isn't any. Might just need a few bumps to pressurize the system. I think there is a way to jump power straight to the pump that might help to fill the lines up.
#4
It sounds like all systems are "go", except the car won't start. Did you replace the pump with the whole fuel module (pump, sending unit) or did you just wire in a new pump. I spent an hour troubleshooting a friend's no-fuel problem when I finally discovered he wired the pump backwards - the pump was running backwards and would never build up pressure - just a thought.
Corky
Corky
Thread
Thread Starter
Forum
Replies
Last Post
TfcCDR
V6 (1994-2004) Mustangs
1
09-14-2015 12:08 PM
zanemoseley
2005-2014 Mustangs
6
09-06-2015 12:58 PM