Hi i got a 1991 rx7 non turbo and we have been trying to figure this promblem out for awhile. At the pump it is only getting 8.7v and same at the resister relay. we have been trying to trace down where the resistance is coming from but cant figure nothin out any ideas???

Thanks, Adam

 

Try the resistor relay itself, are you getting 12v before and after? Or possibly check the ground at the battery.

 

not getting 12v before and redid all the grounds already

 

Look at the wiring diagram for the fuel pump system. Measure the voltage at every point along the circuit until you find where the voltage drops.

http://i8.photobucket.com/albums/a47...uelControl.jpg

 

It''s normal to get approx 9vdc at the pump when the engine is not under load. As in idling.

Disconnect the green/red wire at the resistor/relay and voltage at the pump should go to alternator voltage/battery voltage.

When the car is idling, you might get a sewing needle and ***** one of the blue/red wires. Those wires should have batt/alternator voltage since they are prior to the resistor/relay package.

 

speaking of the fuel pump can someone give me a link to a how to remove it and how to replace the float in the tank because mine is broken and my gauge doesnt work because of it
thanks

 

Feel free to start your own thread rather than hijack someone elses with an unrelated topic. Or search for all the other times this has been covered.

 

i would but i have this curse were everytime i start one i get one reply...which is always the same thing: search... and i always say the same thing back which is , i did. im the type of person that will look for an entire day for the damn answer so im done with making my own threads... and im sorry for hijacking this one
and now that im thinking about it i sort of didnt because he needs to know how to remove it (if he didnt no that is) and i wanted to know to

 

Actually I should've just told you to look in the FSM where fuel pump removal and the fuel level sender are clearly shown. Remove hoses, remove screws, remove pump assembly. Doesn't get any easier.

Hijacking threads with unrelated topics is bad forum etiquette and just plain rude.

And the original poster doesn't need to remove the fuel pump.

 

we'll keep you updated trying some new relays tomm

 

Its a cover plate in the hatch, 4 screws then like 8 more rusty ones under it, its not that hard to pull a fuel pump. I'd tell you to depressurize the lines but it'll be more fun when you get sprayed in the face by gas.

 

You need to get a meter out and find out what is going on. Don't be a parts swapper troubleshooter. That's not trouble shooting.

 

Don't just randomly replace parts if you don't even know what's wrong. Do what I said above.