Rob_Wood wrote:hotmetal1000 wrote:Bypassing the resistor has solved the issue and there is no problem with leaving the bypass in place but it doesn't solve the fact that the fuel pump hasn't gotten a little weak.
Toyota run the resistor at low engine loads to try and extend the life of the fuel pump, it also quietens the fuel pump. I can hear mine running from outside the vehicle easily now.
How long the fuel pump will last running at full power all the time I don't know.
It's a short term solution. By taking out that resistor you're increasing the current draw the pump motor is using and so eventually the increased current will burn the pump motor out. If you're gonna do this for an extended period then maybe think about carrying a spare fuel pump so you can swap it out fairly easily when it does go? The other thing you might wanna clarify is whether you're talking about the Tank transfer pump or the engine injection pump. If it's the tank transfer pump then it should not have any effect on engine performance, if however it's the injection pump, then maybe you should talk to a Fuel Injection Specialist, maybe there is some other issues wrong that you're "short-cutting" by taking the resistor out of circuit. The Pump itself should not fail like this at such a relatively young age. It should go strong for at least 300000Km and in most cases still be good at 500000Km.
My 2 Cents!
V6 Petrol, there is only the one fuel pump located in the tank.
Replaced the fuel pump, put the resistor back in line and all seems happy. No hesitation and fuel trims are normal.
My fuel consumption improved when I bypassed the resistor. It will be interesting to see if it stays lower now as well now that the hesitation is gone.