No Fuel

[grantypanties218]

i am not getting fuel to the engine i have replaced the fuel pump, fuel filter, the fuel pump relay and have tried to bypass the fuel pump sending unit.

i removed the hose right after the fuel filter going into the engine put it in a cup and tried turning it over to my surprise there was no fuel in the cup.

i bought the car dead previous owners said that they had their mechanic look at it and it was the fuel pump. i knew it was going to be a project but i was unaware of how much stuff there is in this car.

i bought the car the battery was dead is there something that i have to reset due to the dead battery?

thank you and please help
grant

[goody90q45]

-Do you hear the fuel pump running for 5 seconds when the key is turned to the ON position?
-Have you used a volt meter to check for 12v at the external connections on top of the fuel tank?
-Have you checked the fuse for continuity (they can fool you) and checked to make sure the fuse is in the right location in the fuse box?

[BCC93QT]

I would have started even before replacing the pump by replacing the pennies on a dollar fuse located near the wheel. If no go on there which i think it is its gotta be the FPCU (fuel pump control unit). Spring time after i replace my fuel pump the car stalled and woulnt start again. Wasn't getting fuel. Was the simple fuse. Check that first........ Good luck

[grantypanties218]

if you guys are talking about the fuse that is inside under the driver side dash that was the first thing that i did

even if it is the FPCU i would have had gas in the cup when i bypassed it.

i also checked all of the fuses in the engine bay over by the battery.

i will have to also check to see if i can hear the pump while i have the key to the on position.

i also hooked the fuel pump directly up to my battery to see if i had the polarity mixed up but it wasnt.

[Q451990]

How did you bypass the FPCU?

Heath

[grantypanties218]

if bypassing the FPCU and grounding the pump is the same thing then i did this

[92Q]

just went through this issue 92 q....re check your 15 amp fuse....i took a breath and started back at square one ...fuse was blown then grounded the white wire as shown turned the ignition on and heard the pump activate....that felt great at 1am ......i then removed the back seat and pryed up the sundeck to locate two bolt heads to remove the fpcm......i opened up the casing of the fuel pump control modulator and saw one solder connection on terminal 4 that didnt look quite right....it wasnt discolored but the solder on it looked like part of it was missing.......i put a nice dab of solder on terminal 4 connection screwed it back together...2 30 am put it back in the car and bolted it down and plugged it in...............turned the key and heard the sound of success...my engine running........without the info.found here i would have thrown my hands up and taken it in.......thnx to all

[grantypanties218]

your talking about the 15 amp fuse under the driverside dash?

[Q451990]

if bypassing the FPCU and grounding the pump is the same thing then i did this

Yep, with a wire coming from the clip to ground of course

Heath

[lino]

just went through this issue 92 q....re check your 15 amp fuse....i took a breath and started back at square one ...fuse was blown then grounded the white wire as shown turned the ignition on and heard the pump activate....that felt great at 1am ......i then removed the back seat and pryed up the sundeck to locate two bolt heads to remove the fpcm......i opened up the casing of the fuel pump control modulator and saw one solder connection on terminal 4 that didnt look quite right....it wasnt discolored but the solder on it looked like part of it was missing.......i put a nice dab of solder on terminal 4 connection screwed it back together...2 30 am put it back in the car and bolted it down and plugged it in...............turned the key and heard the sound of success...my engine running........without the info.found here i would have thrown my hands up and taken it in.......thnx to all

Welcome to Nico! Glad to hear that you fixed your problem.

[92Q]

your talking about the 15 amp fuse under the driverside dash?

yes....i got pretty frustrated took a breath and started at square one..the fuse .....which had blown...i did not use an alligator clip and may have touched somethin other than the white wire which caused the blown fuse.... i replaced the fuse and was able to use the ground wire to bypass the fpcm and operate the pump.....in your pic i dont see a ground wire attatched to your clip...

[92Q]

just went through this issue 92 q....re check your 15 amp fuse....i took a breath and started back at square one ...fuse was blown then grounded the white wire as shown turned the ignition on and heard the pump activate....that felt great at 1am ......i then removed the back seat and pryed up the sundeck to locate two bolt heads to remove the fpcm......i opened up the casing of the fuel pump control modulator and saw one solder connection on terminal 4 that didnt look quite right....it wasnt discolored but the solder on it looked like part of it was missing.......i put a nice dab of solder on terminal 4 connection screwed it back together...2 30 am put it back in the car and bolted it down and plugged it in...............turned the key and heard the sound of success...my engine running........without the info.found here i would have thrown my hands up and taken it in.......thnx to all

Welcome to Nico! Glad to hear that you fixed your problem.

2 weeks ago i replaced a fuel pump in my 91 chevy 1500...drop the tank and all......fuel pump had no audible noise as opposed to the q which was quite loud and had been for some time 180,000 plus on it.....i thought it was supposed to hum loudly...i didnt realize it was goin out and taking the fpcm with it.........each of my new fuel pumps quietly hum at start .....i also have an 05 corolla with a 192,000..maybe that ones next

[lino]

That's a lot of mileage for an '05. Did you put all the mileage on it? I just read something on how to remove the fuel pump:

"The fuel pump can be accessed through a cover under the rear seat cushion bottom part, the seat can be pried up to release the clips in the front of the seat, once the seat is out you can see the cover in the metal, remove the cover, the fuel pump is underneath. "

Apparently it's about $125. Well, at least you know a little more about what you might eventually have to deal with.

[92Q]

thanks for the info....yep to all those miles...i commute 156 a day.and taken it on many a journey....i luv the q45...jus not as good on gas....

[grantypanties218]

i will double check the fuse again but if it is no that then what do i do

i checked the lines and they look in good shape
all hoses are good no cracks

only problem is no fuel getting to the engine

[92Q]

if bypassing the FPCU and grounding the pump is the same thing then i did this

where is your ground wire?

[grantypanties218]

that wasnt my pic i was using it as a reference i grounded my wire to a screw into the side of the trunk where i saw two other wires being grounded

[92Q]

sounds like the same area i used......any progress?

[grantypanties218]

alright so i found the problem the previous owner had all of the fuses mixed up. still wouldnt start so i tried to bypass it again and she fired right up.

so my FPCU is bad now and i dont want to spend a ton of money so what am i looking for or what points do i have to re solder. or is there another fpcu for another more common car that i can swap in.

[92Q]

a step in the roght direction.......read the above posts........you got to remove the fpcm....take out rear seat and pry up sun deck...cut around bolt holes remove two bolts...once fpcm is out of car open it up...both sides and look for discoloration or partially soldered connections ....mine was pin # 4......cost 4 me.....zero dollars....already had soldering iron and solder

[grantypanties218]

i already took the fpcu apart and didnt see any discoloration

i ordered a used fpcu 40$ shipped

[goody90q45]

i already took the fpcu apart and didnt see any discoloration.....

It's the ground circuit that gets overloaded and melts solder joints in the FPCU and other sensors in the Q prone to failure. You know which pin is ground from jumpering so consider taking a 2nd look following the ground's path through the circuit board and resoldering anything suspicious, even resoldering the joints closest to the ground pin whether they look bad or not.

[yodawill2000]

From an old Circuit board repair geek.
"Cold" Solder joints are a dull gray instead of shiny.
you wont see the ring around the pin like a obvious break, but cold solder joints don't work either.
reflowing fresh solder on every pin is the best line of attack.

[92Q]

good info........