B18C fuelling issues


Odin

New Member
Joined
Apr 25, 2021
Messages
9
Car(s)
EK9 B18c
Opinions needs asap

Back story : 1998 EK9 with 96spec B18C

Fully rebuilt with standards cams etc nothing special, engine back in ran in with 1000 miles low revs before first VTEC all good no issues, new Clifford G5 fitted

then the below started :

** fuel pump fails ** ( replaced with high pressure walbro)

** car over fuelling running extremely rich **

** Lamda sensor not reading **

** fuel gauge dropping rapidly and car cutting out**

** New fuel pump will no longer prime with reds **





What we have tried so far :

Apexi Neo remapped
Changed 02 sensor
pump has power
fuel rail and injectors checked

Car wont start now past the reds anyone have any ideas?????
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fuel pressure regulator? 1 time i had problem with the return valve of the fuel pump and it was draining the line like water in a bottle , the fuel railing couldnt hold enough pressure, any chance u checked also the IACV ?
 
Strange problem you're having there.

Do you have a ground from rocker and one from gearbox to solid, bare metal steel? And other grounds are to bare metal?

Would be worth trying a main relay as well, does sound like an intermittent voltage issue.
 
Solved.
Turned out to be a bad ground after alarm went in.
Issue was resolved some time ago now but forgot to update on here.
Thanks for the help guys.

Still having issues with the car running rich but think the issue is with the ECU or engine loom.
 
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