DIY Main PGMFI Relay repair

[CRXer]

If its a HP walbro pump,they can put a lot more load on the main relay than a stock pump.

I actually put another relay on my HP walbro & the main relay controls that second relay to take the load off the main relay.Could be worth looking into if u get further probs with the new relay.

[andyhui01]

does anyone know where the relay is for a 94 JDM Prelude SiVtec,

is it this?

as in the thing with all the wires connected to?

[ECU-MAN]

I remember the main relay being on the passengers side floorwell for the 94 Preludes, have a good look, pull the carpet back, you may even have to remove the kick pannel cover.

[andyhui01]

I'll have a look thanks... I just unbolted some random thing that looked like the relay, pulled it out and it read switch connector or something, can't remember.. lol... I'll try looking for it on the passenger side. thanks.

[dsp26]

Gen3 CRX / Del Sol / EG2 has it located behind the fuse box to the right under the dash. Pain int he arse to remove.. Good Luck!!!

This fixed it ECU-MAN... and i thought i needed a pump... sorry but can't rep you for a while

[dsp26]

slightly off-topic question... which of the contacts on there can I wire a kill switch to?

[CRXer]

slightly off-topic question... which of the contacts on there can I wire a kill switch to?

2 best ones would be either the black/yellow,main power input to the relay or the yellow/green fuel pump output.

make sure u use a good 10-15A switch,prob err towards 15A for longevity of the contacts if your gonna switch the wire direct without a relay.

fuel pump wire u can hide the switch behind your seat somewhere,away from the obvious underdash positions.

[beeza]

yellow = +
green = -
?

[CRXer]

yellow = +
green = -
?

yellow/green = yellow wire with green stripe.

could be different colours for your car,so just research the correct wire if in doubt,or ask

[dsp26]

2 best ones would be either the black/yellow,main power input to the relay or the yellow/green fuel pump output.

make sure u use a good 10-15A switch,prob err towards 15A for longevity of the contacts if your gonna switch the wire direct without a relay.

fuel pump wire u can hide the switch behind your seat somewhere,away from the obvious underdash positions.

thanks matey!! gonna do that today relay one today...

i actually did the fuel pump yesterday too... i cut all 5 wires at the actual pump one at a time trying to figure out which would kill the pump and it was the last one i did.. the thicker yellow/green one you mentioned

[dsp26]

yellow/green = yellow wire with green stripe.

could be different colours for your car,so just research the correct wire if in doubt,or ask

just in case he needs to know too, the other 4 wires at the pump are (and i don't know what they do as none of them affected the pump or sender/gauge when cutting)
- Black
- Black/White
- Yellow
- Green/Red

[beeza]

Geez,I read that wrong didn't I...
Ok,so
- 15A switch mounted and hidden.
- Then run a + and - cable from the PGMFI to the switch.That's it?

I just have to find which wire is + and -
)n my 96Ek1 Civic the PGMFI is behind the glovebox in the corner