2003 350z keeps killing fuel pumps
06-14-2017, 01:13 PM
#1
Registered User
Thread Starter
2003 350z keeps killing fuel pumps
hello there,
right i have a 2003 base model 350z manual with 96k miles on it ..
the car runs and drives amazingly untill this saturday when the fuel pump died ..
well this is how it happend
was cruzing and then the car kept bogging and then back to normal then died
turned the switch off and then on the fuel pump was silent stayed half an hour on the side of the street then tried again fuel pump started like normal car started drove for 5 minutes then the car died .. towed it home and done a quick fuel pump change all was good.
the next day again fuel pump died
took the car to a local workshop dropped the tank and fully cleaned the tank .. it was very dirty with some metal rust leftovers .. and yeah cleaned the injectors too
third fuel pump change done and then it took it only 5 minutes until it died too
any one knows what i missed doing apart from cleaning the tank and injectors..
cheers
right i have a 2003 base model 350z manual with 96k miles on it ..
the car runs and drives amazingly untill this saturday when the fuel pump died ..
well this is how it happend
was cruzing and then the car kept bogging and then back to normal then died
turned the switch off and then on the fuel pump was silent stayed half an hour on the side of the street then tried again fuel pump started like normal car started drove for 5 minutes then the car died .. towed it home and done a quick fuel pump change all was good.
the next day again fuel pump died
took the car to a local workshop dropped the tank and fully cleaned the tank .. it was very dirty with some metal rust leftovers .. and yeah cleaned the injectors too
third fuel pump change done and then it took it only 5 minutes until it died too
any one knows what i missed doing apart from cleaning the tank and injectors..
cheers
06-15-2017, 05:21 PM
#3
Here are some other thoughts:
Did you check the fuel pumps when they were removed from the fuel tank? Do they run fine when not mounted? You should be able to power them up to check that out? If they work fine off the car then look for wiring, restrictions, etc...
I assume you changed the fuel filter when all of this happened? If you have a lot of crude in the tank I'm sure it made it to the fuel filter. Possible plug?
I'm not exactly sure how the fuel system works but I think it is close-loop control on fuel pressure. Find the fuel pressure sensor to the injectors and check that sensor? Maybe you have a bad pressure sensor and it thinks you have fuel pressure so it tells the pump to stop pumping? (assuming the fuel pump check works when powered up off the tank)
Long shot...when you get down to not knowing what else to check...I believe most cars have a rollover sensor that shuts off the fuel pump when it thinks the car has rolled over and is upside down. Or something like that.
Did you check the fuel pumps when they were removed from the fuel tank? Do they run fine when not mounted? You should be able to power them up to check that out? If they work fine off the car then look for wiring, restrictions, etc...
I assume you changed the fuel filter when all of this happened? If you have a lot of crude in the tank I'm sure it made it to the fuel filter. Possible plug?
I'm not exactly sure how the fuel system works but I think it is close-loop control on fuel pressure. Find the fuel pressure sensor to the injectors and check that sensor? Maybe you have a bad pressure sensor and it thinks you have fuel pressure so it tells the pump to stop pumping? (assuming the fuel pump check works when powered up off the tank)
Long shot...when you get down to not knowing what else to check...I believe most cars have a rollover sensor that shuts off the fuel pump when it thinks the car has rolled over and is upside down. Or something like that.