'93 cx fuel pump will not prime faithfully.

civic minded

New Member
1.5l 16v sohc
The fuel pump doesn't seem to be getting any power. I can jump the #5 and 7 terminals at the main relay plug and get the pump to run. It seems to fail to prime after the car has sat for a day or is really hot inside. I've bought a new main relay, but I haven't installed it yet, because I'm waiting for the problem to arise again. I really hope it isn't the ecu. Any suggestions?
 

lethal6

Your Mom's Moderator
Staff member
Registered VIP
Registered OG
5+ Year Member
10+ Year Member
Bad main relay solder points. Very common.
 




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