MazdaRx7Power

ok i searched and didnt find anything that would help. my car keeps flooding at start up. some mornings it turns on fine no problem, drive to work, and when i go to go home 8hrs later bam doesnt start floods. it only happened like once every 2 months now that i put the headers on it does it almost everyday. the o2 sensor isnt connected does that really make a difference. i just changed the plugs to, to some other plugs that i used for a week before. and put the older ones back on because the older ones were still new. i took them out and they were charcoaled. but how do i wire the fuel pump anyone have a good write up on it? thanks for the help

Scott 89t2

get some brand new plugs and see if it goes away.

MazdaRx7Power

anyone got a write up if the new plugs dont work? is it basically just like connecting anything else like some fog lights. connect power & negative and a ground onto a switch?

NZConvertible

Look under the steering column, there's a big relay with a yellow plug. This is the fuel pump relay. Find the middle wire of the five (it's black), cut it and wire a decent sized switch into it (this is the only way the fuel pump should be controlled). Mount the switch somewhere it won't get knocked, the plastic panel under the steering column with the little vent is a good spot.
This is really just a band-aid fix for the real problem. Removing your injectors and getting them professionally cleaned is a good first step. Get a compression test, your motor might be getting tired.