Fuel Pump problem?
#1
Why am I doing this?
Thread Starter
Fuel Pump problem?
83 RX7 12a with stock nikki....heres the problem. Car is sitting in my shop for paint and body work. Have been working on dash/stereo/etc so key switch has been on some. Always remember hearing the fuel pump running when the key was in "run". Decided today to start the car as it hasnt been cranked in a week or two. It started, then died after about 20 seconds, then wouldnt refire. Noticed there is no sound from the fuel pump. Checked the wire to the fuel pump, its getting power. Didnt have time before i went back to work to do anything else, except hook the battery charger up (I have drained the battery working on stereo/etc). Questions are....could the fuel pump be bad? Could I have flooded the car by leaving the key in run too long with the pump running? Thinking I will pull the fuel lines at the carb and check to see if the pump is working tonight? Any tips, ideas on what to check or do???? If I have to replace the pump, whats recommended? Thanks!
#2
Sin City Rotary
nope as the Nikki setup has a return line unless there is crap caught between the needle and seat. You checked and have power to the pump, I'd check the ground before condemming the pump.
#3
Why am I doing this?
Thread Starter
Thanks. Theoretically anytime the pump has power and gro und it should run, correct? Will see what it does this evening and if I don't hear it running will pull it and bench test it.
#4
Sin City Rotary
yes it could get power but if ground is not good to complete circuit won't work
kind of like having one wire to a speaker it doesn't work untill you hook up the other
kind of like having one wire to a speaker it doesn't work untill you hook up the other
#5
Why am I doing this?
Thread Starter
Edit: Think I might have figured out the problem. Got out the old FSM and studied the wiring diagram. The fuel pump grounds thru connector X-15...which is a ring terminal that just happens to be located in the rear hatch area next to the power hatch release, which I removed the other night, and I know i disconnected that ground wire. So hopefully, thats the problem. When I can get back to the car i will check that and see. Beats pulling the pump.....thanks for putting me on the ground search.....
Last edited by 83Limited; 01-24-12 at 04:23 PM.
#6
Sin City Rotary
I beleive the other wire is grounded back inside the car, slow and feeble si a sign of a poor ground. Ever see a light that is kind of dull and someone wiggles the wires and it gets brighter? that would have been a poor ground
#7
Why am I doing this?
Thread Starter
Hooked the ground back up in the tail and all is fine.....bad ground...thanks for the help!
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#9
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#11
Why am I doing this?
Thread Starter
She isnt in too bad a shape....paint is toast, but body is fine, mechanicals so far are ok. Worst so far has been carb rebuild, but thats to be expected. Overall she is pretty much just like I sold her in 88...just a little "shabbier" but complete...so wont take too much to get her lookin like my avatar again. (avatar is 1987, sig pic is 2011)
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