fuel pump relay.
#1
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fuel pump relay.
hi all,
new to this site and cosworths so please bare with me.
i have a mk1 escort and just been given a 2wd cosworth engine.
i have the engine bay harness and ecu. the harness has 2 relays both yellow.
1 black connector and i yellow. i think the black is for the fuel pump.
there is also a purple connector with no relay, is this used.
ok. my problem is i have a self contained fuel system in the car, seperate relays and fused.
can i do away with the relay on the loom or do i need to use it because of the ecu. if so HOW.
any info would be great.
thanks
new to this site and cosworths so please bare with me.
i have a mk1 escort and just been given a 2wd cosworth engine.
i have the engine bay harness and ecu. the harness has 2 relays both yellow.
1 black connector and i yellow. i think the black is for the fuel pump.
there is also a purple connector with no relay, is this used.
ok. my problem is i have a self contained fuel system in the car, seperate relays and fused.
can i do away with the relay on the loom or do i need to use it because of the ecu. if so HOW.
any info would be great.
thanks
#2
I've found that life I needed.. It's HERE!!
You can find wiring diagrams here: http://bigturbo.co.uk/main6.htm
I think you can replace the fuel pump relay for your own. Don't forget the amal valve and the Idle speed valve!
I would keep the main relay as it feeds the ecu, ignition coil and the injectors.
I think you can replace the fuel pump relay for your own. Don't forget the amal valve and the Idle speed valve!
I would keep the main relay as it feeds the ecu, ignition coil and the injectors.
#5
PassionFord Post Troll
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I would leave the relays alone and use the saph fuel relay 12v+ (pin 87) to trigger your new fuel relay/s.
Once the ECU is activated its pin 28 that activates earth switch to the fuel relay (pin 85 ) which in turn provides the 12v+ at the pump ,iscv and boost solenoid.
Once the ECU is activated its pin 28 that activates earth switch to the fuel relay (pin 85 ) which in turn provides the 12v+ at the pump ,iscv and boost solenoid.
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okay i have wired my pump relays like this.
http://img.photobucket.com/albums/v2...4f/o44pump.png
using the old blk/r thick wire for the fuel pump as the trigger.
when i power up the signal from that wire comes back earth.
any suggestions please.
http://img.photobucket.com/albums/v2...4f/o44pump.png
using the old blk/r thick wire for the fuel pump as the trigger.
when i power up the signal from that wire comes back earth.
any suggestions please.
Last edited by gi2490; 05-07-2014 at 01:03 PM.
#10
PassionFord Post Whore!!
iTrader: (1)
okay i have wired my pump relays like this.
http://img.photobucket.com/albums/v2...4f/o44pump.png
using the old blk/r thick wire for the fuel pump as the trigger.
when i power up the signal from that wire comes back earth.
any suggestions please.
http://img.photobucket.com/albums/v2...4f/o44pump.png
using the old blk/r thick wire for the fuel pump as the trigger.
when i power up the signal from that wire comes back earth.
any suggestions please.
Martin
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this is how i have wired the engine loom
http://media.turbosport.co.uk/2006/7...9129027100.gif
with this for the fuel pumps..
http://img.photobucket.com/albums/v2...4f/o44pump.png
all relays ok.. all fuses ok.
http://media.turbosport.co.uk/2006/7...9129027100.gif
with this for the fuel pumps..
http://img.photobucket.com/albums/v2...4f/o44pump.png
all relays ok.. all fuses ok.
#17
PassionFord Post Troll
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Make sure you have a good earth for the pump itself .
If you only want your new relay/fuel system setup connect pin 28 wire to the trigger side on new relay. That can be 86 or 85 and earth the other side .
If your battery is in the boot earth the pump direct .
If you only want your new relay/fuel system setup connect pin 28 wire to the trigger side on new relay. That can be 86 or 85 and earth the other side .
If your battery is in the boot earth the pump direct .
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hi martin.
i made new relay harnesses as they were a bit rusty. grounded the relay as suggested.
still showing earth from fuel pump wirel.
any more ideas.
electrics not my best point.
i made new relay harnesses as they were a bit rusty. grounded the relay as suggested.
still showing earth from fuel pump wirel.
any more ideas.
electrics not my best point.
Last edited by gi2490; 08-07-2014 at 01:34 PM.
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no still struggling.
all relays fine.
power going to ecu all okay.
the one thing i dont have on is the amal valve. i am using manual boost control.
would this affect the ecu.
all relays fine.
power going to ecu all okay.
the one thing i dont have on is the amal valve. i am using manual boost control.
would this affect the ecu.
#23
PassionFord Post Troll
iTrader: (3)
so all your relays and fuses are fine and have power at the ECU.
Check the wiring associated at the hairbrush and give them a clean up.
ECU turns the pump on as said^ via pin 28.
Is the pump earthed well and is it new/old??
Not sure about the amal valve but im sure ive unplugged mine before and started the car so no effect there imo.
Check the wiring associated at the hairbrush and give them a clean up.
ECU turns the pump on as said^ via pin 28.
Is the pump earthed well and is it new/old??
Not sure about the amal valve but im sure ive unplugged mine before and started the car so no effect there imo.
Last edited by opposite lock; 10-07-2014 at 07:13 AM.
#28
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IT LIVES again.
after all your input and advise. a lot of checking rechecking and checking again, i found the problem.
2 faulty brand new relays.
so 2 more sent from athens, another 55 euros, so 110 euros in totall.
i also installed a new chip. pins looked nasty.
hey presto, the beast lives.
thanks for all our advice guys.
will post a video asap.
after all your input and advise. a lot of checking rechecking and checking again, i found the problem.
2 faulty brand new relays.
so 2 more sent from athens, another 55 euros, so 110 euros in totall.
i also installed a new chip. pins looked nasty.
hey presto, the beast lives.
thanks for all our advice guys.
will post a video asap.
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