Or you can just spend 5 minutes and clean out the jets... Ooops.. that will only work on an AC engine.. I forgot that you cannot trouble shoot a WC engine..
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| Author: | rail1914 [ Sun Mar 21, 2010 8:02 pm ] |
| Post subject: | suby fuel pump help` |
i took this set up out of a running car did all of the wiring my self put it back in and now the fuel pump relay wont work i have cheaked all the grounds and power over and over i can jump the relay and the pump works i have injector palse fire every thing but fuel help!!! |
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| Author: | Firebug [ Sun Mar 21, 2010 8:15 pm ] |
| Post subject: | Re: suby fuel pump help` |
Make sure you have the right kind of power going to the pump,,as in ACC not Start ,,,Hot when on. Also make sure your fuel lines aren't crossed. |
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| Author: | MickeyMouse [ Sun Mar 21, 2010 8:50 pm ] |
| Post subject: | Re: suby fuel pump help` |
Or you can just spend 5 minutes and clean out the jets... Ooops.. that will only work on an AC engine.. I forgot that you cannot trouble shoot a WC engine..
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| Author: | rail1914 [ Sun Mar 21, 2010 9:55 pm ] |
| Post subject: | Re: suby fuel pump help` |
the fuel pump will not power up when hooked to the comp. but when i bypass that wire the pump works fine but the pump runs all the time |
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| Author: | Firebug [ Sun Mar 21, 2010 10:15 pm ] |
| Post subject: | Re: suby fuel pump help` |
Is the fuel pump relay clicking? Try disconnecting the battery overnight too. |
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| Author: | tw9294 [ Sun Mar 21, 2010 10:19 pm ] |
| Post subject: | Re: suby fuel pump help` |
rail1914 wrote: the fuel pump will not power up when hooked to the comp. but when i bypass that wire the pump works fine but the pump runs all the time Does the ecm provide power or ground to the relay and is the relay wired accordingly? |
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| Author: | Firebug [ Sun Mar 21, 2010 10:20 pm ] |
| Post subject: | Re: suby fuel pump help` |
http://www.justanswer.com/view_image.as ... ubpump.gif |
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| Author: | rail1914 [ Sun Mar 21, 2010 10:27 pm ] |
| Post subject: | Re: suby fuel pump help` |
this is a 1994 ej2.2 set up |
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| Author: | buggiejunky [ Sun Mar 21, 2010 10:32 pm ] |
| Post subject: | Re: suby fuel pump help` |
that diagram is obd1 only has 1 o2 sensor |
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| Author: | rail1914 [ Sun Mar 21, 2010 10:40 pm ] |
| Post subject: | Re: suby fuel pump help` |
its wired just like the digram the lg/b on D23 is the wire that is not working |
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| Author: | Firebug [ Sun Mar 21, 2010 11:03 pm ] |
| Post subject: | Re: suby fuel pump help` |
Perhaps the ecu is bad. Might try another one. |
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| Author: | rail1914 [ Mon Mar 22, 2010 7:41 am ] |
| Post subject: | Re: suby fuel pump help` |
can the fuel pump run on the ing. switch or does it have to run on the comp. |
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| Author: | Firebug [ Mon Mar 22, 2010 8:05 am ] |
| Post subject: | Re: suby fuel pump help` |
rail1914 wrote: can the fuel pump run on the ing. switch or does it have to run on the comp. It needs the computer to tell it when to run. |
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| Author: | Maddog [ Mon Mar 22, 2010 9:59 am ] |
| Post subject: | Re: suby fuel pump help` |
Check the relay, it should run off the ignition since it has a fuel return, as well. |
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| Author: | PhillipM [ Mon Mar 22, 2010 3:47 pm ] |
| Post subject: | Re: suby fuel pump help` |
Usually the comp. just earths the relay for the pump, so if the comp. is bad, the circuit is usually fused open and it runs all the time rather than never switching on. |
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| Author: | Odyknuck [ Mon Mar 22, 2010 4:09 pm ] |
| Post subject: | Re: suby fuel pump help` |
If you can not figure out why it does not work from the ECU, I see no reason why you can not connect it to you Ignition circuit to run constantly. The system has a fuel regulator to maintain the proper pressure so it should not matter. |
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| Author: | numbchux [ Tue Mar 23, 2010 1:34 am ] |
| Post subject: | Re: suby fuel pump help` |
Odyknuck wrote: If you can not figure out why it does not work from the ECU, I see no reason why you can not connect it to you Ignition circuit to run constantly. The system has a fuel regulator to maintain the proper pressure so it should not matter. not a terrible idea. although I would only use it for troubleshooting. in the long term, I think letting the ECU control the fuel pump is a much better idea. Are you sure the ECU is turning on like it should? all power sources hooked up correctly? Do you have power to both yellow wires at the fuel relay? The ECUs are much harder to damage than you might think. but not impossible. if you think the ECU is wired correctly, and the only issue is the fuel pump, hard wire and see if it goes. But I bet it's a larger issue. |
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| Author: | rail1914 [ Tue Mar 23, 2010 7:26 am ] |
| Post subject: | Re: suby fuel pump help` |
yes both yellow wires have power if i by pass the relay it will start and run but i would like it to run on the ecm so im still working on it cheaking every thing |
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| Author: | Stevo [ Tue Mar 23, 2010 8:08 am ] |
| Post subject: | Re: suby fuel pump help` |
tw9294 wrote: rail1914 wrote: the fuel pump will not power up when hooked to the comp. but when i bypass that wire the pump works fine but the pump runs all the time Does the ecm provide power or ground to the relay and is the relay wired accordingly? On my suby the comp grounds the relay, so make sure the relay is wired correctly |
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| Author: | rail1914 [ Tue Mar 23, 2010 5:09 pm ] |
| Post subject: | Re: suby fuel pump help` |
thats how mine is but no ground comes out im going to try another ecm i got to see if that works |
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| Author: | Firebug [ Tue Mar 23, 2010 7:48 pm ] |
| Post subject: | Re: suby fuel pump help` |
Some suby 2.2 obd1 had a cluster of grounds that grounded to the engine. Double check your grounds too. |
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| Author: | rail1914 [ Tue Mar 23, 2010 7:59 pm ] |
| Post subject: | Re: suby fuel pump help` |
it was the ecm tried a new one it works great thanks for the all the in put |
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| Author: | Odyknuck [ Wed Mar 24, 2010 1:23 pm ] |
| Post subject: | Re: suby fuel pump help` |
All else fails blame the computer, they don't care!   Glad you found it.
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