fuel pump not turning on.

azn2nr · 05-13-2006, 03:51 AM

tried to start the swap today and it would turn over but not fire. havent checked the spark yet but i know for sure that there is no fuel. there is no pressure in the hose and no fuel in it either.

everything else so far is going good. no door chime, or airbag, or cel lights but batery and oil stay on. everything else is pluged in that i can find mates to. all others are asumed to be accsories that have yet to be pluged in. ie cruise, radio, ect.

how do i fix this? sugestions??

For reference this is a legacy ej22t into a 95 impreza. matt monson did a full harness merge for me and i have not clue what im doing when it comes to wiring which is why i outsourced that part of the swap. please help me.

* Registered users of the site do not see these ads.

ImprezaRSfan! · 05-13-2006, 10:07 AM

theres a wire going to the old ecu, that u must cut and relocate to a ground. forget which wire. lol

fuses?
use a meter and check the power and ground at the pump

azn2nr · 05-13-2006, 01:22 PM

the car is being ran by the ej22t ecu. do i still need to find a wire to ground?

azn2nr · 05-13-2006, 07:47 PM

bump i need help. conector isnt getting any power. i think i found the relay in the main box but i cant be sure. switched out the relay i thought was it and now my fans wont turn on as they did before.

XENONSVX · 05-13-2006, 09:40 PM

the fuel pump relay is under the dash in the upper left. should be right under your main relay (big brown thing)

if your pump isn't kicking on then that's the 1st place to check

subbyspeed · 05-13-2006, 10:52 PM

If your check engine light isn't coming on, thats a good indication that the ecu is not getting power. Check that first.

azn2nr · 05-13-2006, 11:01 PM

check engine light wasnt kickin on but now it does and the temp gauge goes haywire adn the fuel gauge doesnt work anymore. ill check ecu next.

ps how does the fuel pump work ie what electric connections need to be completed before it works.

azn2nr · 05-14-2006, 01:40 AM

checked spark tonight to see if i had that. dont have it either

kbahus · 05-14-2006, 11:50 AM

I just got my swap to run and had a similar situation to yours. I pulled all the plugs out of the ecu. Then checked every ground first to make sure they were grounded. Then checked all the power wires. One is constant, the rest are switched. I then discovered it was not getting switched power from main relay. I then just worked backwards from the relay and found my problems. You will need a voltmeter to test the grounds and voltages. I don't know the differences between my ej20g harness and yours but I am sure it is similar.

azn2nr · 05-14-2006, 04:35 PM

whats the difference between a constant and switched voltage readings. adn where can i find a normal reading list?

azn2nr · 05-15-2006, 12:19 AM

bump.

kbahus · 05-15-2006, 03:01 AM

Constant power is a wire that will be providing power constantly without the key switch in the "on" position. Switched power is with the key on. 12v is a what the voltage should be, I wouldn't try this stuff unless you know how to use a voltmeter.

azn2nr · 05-15-2006, 04:11 AM

maybe its late but i dont understand what you mean by the difference between the key in the on position and the key on. also i can test volts on most of the connections but the only problem is on one connection from the fuel pump back there is no ground pin to connect the circut therefore its untestable.

azn2nr · 05-15-2006, 01:37 PM

bump
.

FuJi K · 07-07-2006, 02:42 PM

I needs helps too! My pump isn't turning on.
'91 EJ22T harenss/ECU into '99 Impreza L. I have everything taken apart, did a few things.......

fuel pump doesn't turn on, dash lights are not on.....

I DON'T HAVE THE ENGINE IN YET, so all the plugs are not connected to the engine harness yet....that might explaine a few things too....we tried unpluggin the bulkharness plugs on my friends Impreza w/ 2.5L swap and his pump stays on in "ON" postion. Maybe I just have to put in my engine first.....

crazyGC8 · 07-07-2006, 07:21 PM

Quote:

Originally Posted by azn2nr

maybe its late but i dont understand what you mean by the difference between the key in the on position and the key on. also i can test volts on most of the connections but the only problem is on one connection from the fuel pump back there is no ground pin to connect the circut therefore its untestable.

Constant power= ignition turned off, power even when switch off. Notice "without switched turned on" in his post. Always constant either way on or off.

Switched= power when switch is turned on. Only when switch is turned on.

Like how the clock in the radio works while your key's are not in the car. Same thing. Good Luck.

crazyGC8 · 07-07-2006, 07:23 PM

Quote:

Originally Posted by FuJi K

I needs helps too! My pump isn't turning on.
'91 EJ22T harenss/ECU into '99 Impreza L. I have everything taken apart, did a few things.......

fuel pump doesn't turn on, dash lights are not on.....

I DON'T HAVE THE ENGINE IN YET, so all the plugs are not connected to the engine harness yet....that might explaine a few things too....we tried unpluggin the bulkharness plugs on my friends Impreza w/ 2.5L swap and his pump stays on in "ON" postion. Maybe I just have to put in my engine first.....

I would definatley put the motor in first, you might find your waisting your time trying to troubleshoot when it's not even needed.

05-13-2006, 03:51 AM	#1
azn2nr Scooby Specialist Member#: 35276 Join Date: Apr 2003 Chapter/Region: RMIC Location: Salt Lake City, UT Vehicle: dust collector	fuel pump not turning on. tried to start the swap today and it would turn over but not fire. havent checked the spark yet but i know for sure that there is no fuel. there is no pressure in the hose and no fuel in it either. everything else so far is going good. no door chime, or airbag, or cel lights but batery and oil stay on. everything else is pluged in that i can find mates to. all others are asumed to be accsories that have yet to be pluged in. ie cruise, radio, ect. how do i fix this? sugestions?? For reference this is a legacy ej22t into a 95 impreza. matt monson did a full harness merge for me and i have not clue what im doing when it comes to wiring which is why i outsourced that part of the swap. please help me. * Registered users of the site do not see these ads.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Fuel Pump Relay not turning on	DeusExMachina	Electrical & Lighting	7	10-04-2006 09:08 PM
Help! Fuel Light NOT Turning On!	cyrus951	Service & Maintenance	9	10-02-2006 01:48 PM
Fuel Pump not turning on	chinoWRXL	Factory 2.0L Turbo Powertrain	19	12-09-2005 12:51 PM
fuel pump wont turn on after motor install.	oldbluwrx	Factory 2.0L Turbo Powertrain	7	07-15-2005 11:01 AM
Friends fuel pump not turning on?	kaos200	Normally Aspirated with bolt-on Forced Induction Powertrain	11	03-14-2004 10:25 PM

05-13-2006, 10:07 AM	#2
ImprezaRSfan! Scooby Specialist Member#: 13520 Join Date: Dec 2001 Chapter/Region: MAIC Location: Springfield, VA Vehicle: 99rs ej207 spec-c its for sale	theres a wire going to the old ecu, that u must cut and relocate to a ground. forget which wire. lol fuses? use a meter and check the power and ground at the pump

05-13-2006, 01:22 PM	#3
azn2nr Scooby Specialist Member#: 35276 Join Date: Apr 2003 Chapter/Region: RMIC Location: Salt Lake City, UT Vehicle: dust collector	the car is being ran by the ej22t ecu. do i still need to find a wire to ground?

05-13-2006, 07:47 PM	#4
azn2nr Scooby Specialist Member#: 35276 Join Date: Apr 2003 Chapter/Region: RMIC Location: Salt Lake City, UT Vehicle: dust collector	bump i need help. conector isnt getting any power. i think i found the relay in the main box but i cant be sure. switched out the relay i thought was it and now my fans wont turn on as they did before.

05-13-2006, 09:40 PM	#5
XENONSVX Scooby Newbie Member#: 41719 Join Date: Aug 2003 Chapter/Region: MWSOC Location: LANSING, MI Vehicle: XT, SVX, JUSTY & GF8 STI V4 RA	the fuel pump relay is under the dash in the upper left. should be right under your main relay (big brown thing) if your pump isn't kicking on then that's the 1st place to check

05-13-2006, 10:52 PM	#6
subbyspeed Scooby Specialist Member#: 16274 Join Date: Mar 2002 Chapter/Region: MWSOC Location: Columbus,OH Vehicle: 2001 GM6 2.0L vf30 e30 black/rust	If your check engine light isn't coming on, thats a good indication that the ecu is not getting power. Check that first.

05-13-2006, 11:01 PM	#7
azn2nr Scooby Specialist Member#: 35276 Join Date: Apr 2003 Chapter/Region: RMIC Location: Salt Lake City, UT Vehicle: dust collector	check engine light wasnt kickin on but now it does and the temp gauge goes haywire adn the fuel gauge doesnt work anymore. ill check ecu next. ps how does the fuel pump work ie what electric connections need to be completed before it works.

05-14-2006, 01:40 AM	#8
azn2nr Scooby Specialist Member#: 35276 Join Date: Apr 2003 Chapter/Region: RMIC Location: Salt Lake City, UT Vehicle: dust collector	checked spark tonight to see if i had that. dont have it either

05-14-2006, 11:50 AM	#9
kbahus Scooby Specialist Member#: 70256 Join Date: Sep 2004 Chapter/Region: RMIC Location: Fort Collins, CO Vehicle: 2000 STI V2 Swapped Silver	I just got my swap to run and had a similar situation to yours. I pulled all the plugs out of the ecu. Then checked every ground first to make sure they were grounded. Then checked all the power wires. One is constant, the rest are switched. I then discovered it was not getting switched power from main relay. I then just worked backwards from the relay and found my problems. You will need a voltmeter to test the grounds and voltages. I don't know the differences between my ej20g harness and yours but I am sure it is similar.

05-14-2006, 04:35 PM	#10
azn2nr Scooby Specialist Member#: 35276 Join Date: Apr 2003 Chapter/Region: RMIC Location: Salt Lake City, UT Vehicle: dust collector	whats the difference between a constant and switched voltage readings. adn where can i find a normal reading list?

05-15-2006, 12:19 AM	#11
azn2nr Scooby Specialist Member#: 35276 Join Date: Apr 2003 Chapter/Region: RMIC Location: Salt Lake City, UT Vehicle: dust collector	bump.

05-15-2006, 03:01 AM	#12
kbahus Scooby Specialist Member#: 70256 Join Date: Sep 2004 Chapter/Region: RMIC Location: Fort Collins, CO Vehicle: 2000 STI V2 Swapped Silver	Constant power is a wire that will be providing power constantly without the key switch in the "on" position. Switched power is with the key on. 12v is a what the voltage should be, I wouldn't try this stuff unless you know how to use a voltmeter.

05-15-2006, 04:11 AM	#13
azn2nr Scooby Specialist Member#: 35276 Join Date: Apr 2003 Chapter/Region: RMIC Location: Salt Lake City, UT Vehicle: dust collector	maybe its late but i dont understand what you mean by the difference between the key in the on position and the key on. also i can test volts on most of the connections but the only problem is on one connection from the fuel pump back there is no ground pin to connect the circut therefore its untestable.

05-15-2006, 01:37 PM	#14
azn2nr Scooby Specialist Member#: 35276 Join Date: Apr 2003 Chapter/Region: RMIC Location: Salt Lake City, UT Vehicle: dust collector	bump .

07-07-2006, 02:42 PM	#15
FuJi K Scooby Guru Member#: 3687 Join Date: Jan 2001 Chapter/Region: MWSOC Location: St. Paul, MN Vehicle: MY99 GF4 JDM 6spd NF Performance	I needs helps too! My pump isn't turning on. '91 EJ22T harenss/ECU into '99 Impreza L. I have everything taken apart, did a few things....... fuel pump doesn't turn on, dash lights are not on..... I DON'T HAVE THE ENGINE IN YET, so all the plugs are not connected to the engine harness yet....that might explaine a few things too....we tried unpluggin the bulkharness plugs on my friends Impreza w/ 2.5L swap and his pump stays on in "ON" postion. Maybe I just have to put in my engine first.....