Rep Power: 0

i'd like to know is if it is possible to start a healthy running 5 gen. Civic with the main relay pulled and a jumper wire in the main relay plug.

why ? well....

When i jump the main relay plug, i hear the fuel pump kick on, but the car does not start despite having spark ( weak, but enough to fire )

This would point to the fuel injectors as a possible problem, but if this were the case then the main relay should kick the fuel pump on, but it's dead silent and without current to the pump ( tested at the pump )

I tested the main relay for continuity and it checks out fine. I have a brand new one ( perhaps 150 miles ) that has the same symptoms.

I checked the ignition for continuity today, and it's fine as well. :hothead:

I started a thread on it here, but haven't had any replies.

https://www.civicforums.com/forums/2...its-humid.html


Thanks

 
Rep Power: 518

Only if you know what you are doing. The PGMFI main relay is a dual relay.

Get a wiring diagram and look.

One set of contacts (jumper terminals 5 to 4) powers the fuel pump,

the other set (jumper terminals 6 to 7) powers the ECM and some other things, like the injectors and the O2 heater.

It can't run without both of these powered up at the same time.

 
Rep Power: 0

I may be saying the obvious. THough as a college student I can understand budgets.
Why not just replace the thing?
I have re-soldered the points on my for good measure but i wouldnt bother jumping it.