rangerbrown

ok... heres the deal.


got two rx-7, ones a 87 and the other a 88.
now the 88 ran or so i was told, it was how ever 7 months ago that this thing was started, and the fuel in it is (well was) even older.

the key on to run, i never heard the pump kick on, so i check all the fuses and they are (accordign to the repair book any way) good

so i go to the back and unplug the pump and try a direct power to it, nothing.
pull it out and its, shot. no problem go to autozone get a new one for free. (the guy i got them form had it replaced before less than a year ago, interesting).

ok so now the pump works, but still no power to it with the key in the run postion.
now i try to to bypass that with the plug under the hood (that used to test the fuel press), ok now the pump works with the key on.

so what are your thoughts?

now i have fuel, and pressure, and spark, and compression



but guess what it turns over but still will not fire. (fuel pump runing by bypassing with the pressure test.)


we also pumped all the fuel it would pump out of the tank and loaded it with 10gal of fresh fuel.

we (against better jugment) used staring fluid and i only got it to pop once and that was it.
hat one time was after i pulled the plugs and cleaned them and turned the engine over for a few mins to try and perge the fuel injectors and the cly's (sorry i lack the right term for this engine)

the plugs and wires are in the right place (double checked very interesting the way they are set up, they also look new.)







thought and comments?


at this point i think the injectors are fouled like the pump was and are no good. what can i do? and it seems like there goingt o be a pain in the *** to get to all of them, but i do have the set in the 87 i can grab.





the 87 has a blown apex seal. no title so it is a parts car.

Icemark

The fuel pump on those two cars is only powered during crank and when the engine is running. It is not powered on with just the key.

If the engine is not running or the key is not in the crank position the pump will not be powered.

Rotary Noob

Heres my suggestion to you. I know it works, since i did it. Remove the hose going from your airbox, to your intake manifold (not forever, just for a few minutes) Now, spray some regular fuel in there (87 is fine) you dont need starting fluid. Then hit the key. It will start, and run while you have fuel to it, obviously. Remove fuel, and your car will die.

Now, you spray fuel in, get it to light, do it again (use a 16ounce water bottle, and use a full 16 ounces of gas)

After you do one whole cycle like this, you should have fuel coming from the tank.

Re attach that hose you took off to spray fuel in. spray some fuel in there before you do that just to make sure it will light.

hit the key. It should light, and stay lit. If it doesnt, well, dont know what to tell you. But thats my personal experience from it.

Might check the fuel filter, its pretty easy to get to. If youre going to check that, i would suggest doing so, before you prime the line, or its going to leak all over you.

Hope that fixes everything for you.

rangerbrown

ok will do, something else i would like to do is check the pressure regulator, with the pump on, i can hear the fuel going some were like it was going though the injectors or the regulator, should it build up pressure first then by pass though the regulator?

man this sucks as this somthing i am good at. but i will start there and see what happens

also i am going to check the compression how would i go about this, were should it be so that i knwo this isnt a problem first?


this is killing me i want to drive it

Rotary Noob

Dont know how to check compression on the rotary, havent needed to do it yet. It should be good, if you have spark, fuel, and compression, with just what i said.

Dont know how the fuel system works, as a whole, but like i said, hope everything worked out for you.

Icemark

Probably flooded.

Not the regulator... the regulator is in full flow when the engine is not running and the pump is jumpered.

if you pull the spark plugs what do they look like.

I think you are barking up the wrong trees.

rangerbrown

well, the first time i pulled them they were wet and smelled like old gas.

i cleaned them (with starting fluid, and wiped them down, they were light brown and black)

i put them back in acordding to the way they are labled (cant rember now but the book called for certain letter on the plugs to be a a certian place.)

when i tryed to start it that time was when i got the pop (almost started but nothing after that), the next time i pulled the plugs they were wet again.

so do i have a spark problem? i was thinking this too but was unsure till now. now that i know that the pump is working like it should.





the reason i thought the pump should be geting power in the on/run postion was the book said that i should hear the pump stir for a second and then cut off. i do not hear that when i turn the key on.


ut i havent tryed to see if its geting power when the key is turned to start. I will try that next time i get out to the shop to work on it.

Icemark

wet means the car is flooding and your fuel system is just fine.

again you are barking up the wrong tree looking at fuel problems.

Your engine is flooded. Read the FAQ for FC sticky thread at the top of this section. It covers flooding.