Hello my 98 tacoma 3.4l wont start cranks over fine but No power to the fuel pump. I have changed my Fuel pump,Fuel filter, Wiring harness, Mass Air sensor, EFI relay, Fuel pump relay and my ECU what else can it be ???????
Sounds frustrating. Presumably you've also checked the fuse panel for blown fuses? Check to be sure you're at least getting power to the fuse, that will at least narrow down a problem before the fuse or after.
SOURCE: need location of the fuel pump relay on a 1990 toyota pu, six cylander 4x4
The Feol pump/circuit opening relay is located inside the cab on a relay block either behind the glove bosx or the right kick panel, I'll see if I can locate a location diagram and post it in a follow up. In the meantime locate the diagnostic check connector under the hood,it's located near the right fender on a fuse block, open the cover and put a jumper wire between the terminals FP and B+, turn the key on and let me know if this makes the fuel pump run.
SOURCE: 1998 Tacoma V6 (Pre-runner) dies when key is released
WEL I WOULD CHECK MASSAIR FLOW SENSOR OR LOOK FOR VACUM LEAKS LIKE HOSE COULD CAMSENSOR OR CRANK SENSOR OR IF YOU PUT THE ECU DID YOU HAVE PROGRAMD
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if i add power to the fuel pump direct from the battery the truck runs good but there has to be something wrong to not give power to the fuel pump
Have some one turn the key towards the start position, while you listen at the fuel tank. This is also where a good cheap pair of mechanics stethescope comes in handy. The electrical pigtails could be the problem. There is also a relay and a fuse in your engine compartment and most likely the drivers side. Always disconnect your negative terminal from the battery first. It is easy to fry a component if you do not.
the wiring harness has been replaced and with a meter on the fuel pump terminals i cant get voltage .When i test the terminalsof the relay there is 12v and the relay and fuses are new battery allways disconected when working on it
Its getting frustrating the truck has allways run good and it just died when we were driving , after towing it home we taped the top of the fuel tank and if fired up for about 5 min then it just died and never started so naturally i replaced the fuel pump and filter and nothing so then replaced relay and fuses then mass air flow sensor and o2 sensor then replaced the ecu all vacume lines are good and now im lost
On most all vehicles there is a fuel shut off switch. If you have been in a wreck or bumped something hard the switch can shut off the fuel pump. This is a saftey device. Read your manual to find out where yours is, usually it is located on the passenger side. There will be a hole. If it popped up and is showing red just push it back down and you should be good to go. Hitting a speed bump to hard can activate this switch and disable your vehicle.
according to toyota there is NO fuel cutoff sensor but i can google the part and buy one for 100 dollars but i cant find one i have tested all fuses and verified power at them
maybey the fuel cutoff is not on the canadian trucks i know there is slight differences with them when they are made in the usa
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