View Full Version : integra fuel pump not getting the current
relay is good, pump is good, as far as I can see the electrical connections appear in good shape, no fried wires or black soot on anything.
If the ecu gives the fuel pump current for two seconds, it must go through some sensors, which ones do you think are bad?
Am I doing this the right way?
don't know, but welcome to the site.
BoarderAJAX
06-16-2003, 06:47 PM
the fuel pump should always have current, get a test light and check all the wires to make sure that they are hot. It might not be in the connections
Mike
oldskoolracer
06-16-2003, 08:02 PM
did you check all the fuses under the hood,
and is it coming on at all?
yes all the fuses are good. If I were to run a direct fused wire from the battery to the pump via relay, it would energize the pump whenever the key is turned on. is that ok?
HONDA GHANDI
06-16-2003, 11:20 PM
no, its not ok. It will burn up the pump. The ECM runs the pump for two seconds whent eh key is on to prime the fuel rail. After the car is started it runs as long as the motor is running. You probably have a bad MAIN RELAY. Those are very common failures on Hondas and Acuras.
I tested the main relay according to haynes and it checks out ok. IT even clicks when the key is on.
could it be the Air Temperature Sensor Intake/Mnfld??
HONDA GHANDI
06-16-2003, 11:24 PM
Originally posted by dang
I tested the main relay according to haynes and it checks out ok.
how did they tell you to "TEST" it?
Originally posted by HONDA GHANDI
how did they tell you to "TEST" it?
remove relay and connect a fused wire to terminal 4 and + battery. Connect terminal 8 to the -. check continuity between 5 and 7. It checked out.
next, connect + to 5 and - to 2. check cntinuity between 1 and 3 again good.
next, connect + to 3 and - to 8. check across 5 and 7. good also.
Now if all that is good check the relay connector. termnal 1 puts out 12 volts, terminal 5 gets 12 when key is cycled on and off, When in start mode, 12 volts is present at number 4 and ground.
they say check oil pressure switch or the theft deterrent system may be malfuntioning
Its a 1990 Acura Integra LS, does it have an anti-theft device?
HONDA GHANDI
06-17-2003, 11:45 PM
If it was dealer installed it might have one.
have you checked for voltage at the fuel pump connector at the fuel Pump?
I did remove the back seat and undid the connector at the sending unit, which is supposed to be for the fuel pump also.
Which one of those terminal is supposed to have the two seconds of juice? I could not find one, I did find one that had constant 12 volts, and another that had 6.5 volts. I thought that was good enough, and I pulled out the fuel pump, but I hot wired it to the battery and it was good.
So one of those terminals is not suppling the power. which one is it?
Someone at a speed shop told me its ok to wire a relay to an aftermarket Fuel pump, I got a Walbro, so it should'nt burn out for at least 12~15 years.
HONDA GHANDI
06-19-2003, 10:24 AM
You shouldnt wire it directly to the ignition switch like your previous post though, an aftermarket pump is fine but it should be wired like the original pump. Ask Acurabro, he forgot and left his pump running once and almost burned his car to the ground.
Its just not very safe. with a bit of diagnosis your car can be fixed withuot having to add a new fuel pump and wiring. Trust me.
It would go off as soon as the engine is cut off. seems safe enough?
actually, I would do this only as a temp fix, so I can as least drive it to an Acura dealer to diagnose it. Probably a sensor, hope its not an expensive one...I don't get a trouble light on the dash, but maybe it don't work.
12seccivy
06-22-2003, 08:02 AM
Originally posted by dang
It would go off as soon as the engine is cut off. seems safe enough?
actually, I would do this only as a temp fix, so I can as least drive it to an Acura dealer to diagnose it. Probably a sensor, hope its not an expensive one...I don't get a trouble light on the dash, but maybe it don't work.
you should listen to Ghandi.. i think he is right.
i agree that it's probably the main relay.
incidently he is a honda master tech.
:D
HONDA GHANDI
06-22-2003, 09:10 AM
BUTCHIE! where you been at man?
12seccivy
06-22-2003, 03:39 PM
Originally posted by HONDA GHANDI
BUTCHIE! where you been at man?
whats up dude!
just been lurking around. i havent really been online much these days.
how life in denver?
it's booooring here!:(
HONDA GHANDI
06-22-2003, 07:22 PM
Life is good. Imtoo busy to be bored thats for sure. Hope to see oyu soon maybe.
Originally posted by HONDA GHANDI
You shouldnt wire it directly to the ignition switch like your previous post though, an aftermarket pump is fine but it should be wired like the original pump. Ask Acurabro, he forgot and left his pump running once and almost burned his car to the ground.
Its just not very safe. with a bit of diagnosis your car can be fixed withuot having to add a new fuel pump and wiring. Trust me.
I'm not worthy! ;wor; ;wor; ;wor;
Relay it is, took it (hot wired) to an acura dealer, the tech taped on the relay, pulled off the hot wire, and the car continued to run.
I walked to the parts counter and bought a new MAIN RELAY.
Seems to have fixed the problem, starts great everytime.
Those troubleshooting checks arn't worth a darn!
Weston-work
06-24-2003, 05:41 PM
Originally posted by dang
Someone at a speed shop told me its ok to wire a relay to an aftermarket Fuel pump, I got a Walbro, so it should'nt burn out for at least 12~15 years.
Someone at a speed shop isn't too smart. You should always fix the cause of the problem rather than just wiring around it. The ECU has control over the pump for a reason. Even with an aftermarket pump that requires more power than the stock relay and wires can handle, I would still use the stock wire to control the relay that turns the aftermarket pump on or off.
vBulletin® v3.7.1, Copyright ©2000-2008, Jelsoft Enterprises Ltd.