fLyiNgOuFeR

i mean fire as in pulse. (not a blaze up a joint type fire!) the car has fuel, spark, anf air. i know the car is getting fuel because i pulled off the fuel inlet hose and fuel came gushing out. then i pulled off the outlet hose and fuel cam gushing out (this is with the ignition on of course) i looked at the air flow meter when a friend was crankin the car and then door opened a little. (the car is a 87) then i started changing sensors. changed the afm, solienoid resistor, ecu, leading and trailing coils, main relay, and crank angle sensor. i know for sure the car is getting spark because i hooked up a timing light to every spark plug wire one at a time and the light flashed when cranking. the timing is dead on and there is a heartbeat when i crank the car(tach gauge jumps when cranking) heres the funny thing. the electric fan turns on when turned to "ON" position.(like when your engine floods and you pull out the fuse for your inj. and your fan turns on) i am 89% sure the injectors aren't firing cause there is no smell of gas coming from the exhaust. also a mind boggler is i got the car started a couple day ago. then i turnud it off cause the "add coolant" and buzzer came on. i need help and know you guys are the only people can help me. i thought i could fix this car when bout it but i was wrong. pleeeeeeez help!!!!!!!! thanks for any replies or anything at all!!!!!
( oh yeah!! also changed spark plug wiresandchecked all fuses. fuel pump work well cause i jumped the yellow connectorby the AFM and hear the pump workin at 12v and changed spark plugs as well)

HAILERS

Two quick things to get on track. One is get some starting fluid and spray in the inlet and see if it will momentarily start. Two is to take the top plugs out and have someone crank the engine. If you see a spray or fog of gasoline then the injectors are working to some degree. I realize that the car started once for you, but I'd still do the above today. Do you have a digital meter????? By the way, that was a very detailed description of your problem. A lot depends on the result of the two checks above.

fLyiNgOuFeR

i can use brake cleaner to sray in the intake ryte? i am also very sure the injectors arn't firing because there is no smell of gas in the exhaust. i'm ganna try those tests now and hopefully you can help me out if it's not too much trouble. on behalf of everyone on the forum, i thank you hailers for always helping everyone out w/ thier busted *** rydes. i always see you replying to everyones problems. your like a rx-7 doctor. you should change your name to "Dr. rx-7"

HAILERS

I don't know about the brake cleaner in lieu of starter fluid. Never tried it so I don't know. Somebody else will have to answer that. Most the answers I give are copycats from sites like this one that I just about forgot about but came across a little while ago http://home.rmci.net/panther/ you should bookmark it for reading in your spare time. Their tech page has a lot of answers. More I think about it the more I'd go with the starter fluid. Oh! Most of the time I view this site while watching television. Lot of commercials and lack of entertainment. Do this to fill the time until something good comes along. Also have three cars and each one has broken one thing or the other. I also sometimes give , well , wrong answers or misleading answers. I try to correct the ones I find. Usually happens when watching the Playboy channel.

fLyiNgOuFeR

ok, brake cleaner works but not very well. doesn't kee the engine alive very long. so i got starting fluid and the engine started and ran for like 5 seconds. but after i burned up all the starting fluid the car died. so when i was stakin off the upper manifold to see if injectors where spraying out fuel, i noticed the harness was fried under the rack of soleniods. i took a test light to the wire that comes from the computer and goes to injector and hooked the other light to pos(+) power and cranked the car. test light did not blink. i then went to computer and stabbed one of the injector wires and cranked. light was blinking. i now am pretty sure there is a short or open in the wires between ecu and injectors. i want to thank everyone that helped (espesially HAILERS) fro helping. i'll write a follow up soon.

HAILERS

With the starter fluid I was trying to make sure that it was a lack of fuel that was causing the problem, even though you said couldn't smell fuel.Glad you found the bad wires. By the way, you probably know that the wire from the solenoid resistor to each injector supplies 12v and what the ecu does is put a ground on the other wire to the injector to pulse it. Using the schematics at http://www.iluvmyrx7.com/Technical_I...ice_manual.htm you could ohm out the wires from the ECU to each injector to find out just which wires are toast. Sounds like you've got it fixed already though. Feels good finally finding the problem, does it not?? Have fun. EDIT: Glad you wrote back to tell us what happened. Sometimes the threads end without a conclusion as to whether the car gets fixed or not.

HAILERS

And you remember that the ECU ground is actually under that rats nest undet the dynamic chamber? About three wires ganged together on a round or circular connector that a bolt goes thru. I think that particular bolt hold the mount for the soelnoid valves. I think so, not sure right now. Its right on top of the engine though biased left of the center line of the engine and a bit towards the rear. NO ground to the ecu, no ground for the injectors to fire.

fLyiNgOuFeR

ok. i've changed the harness now and the car runs. it runs like i dropped a couple bolts into the engine but it runs. nopw i can drive it back and fourth across the street for street cleaning. now i've narrowed it down to this. only one injector is pulsing out gas. i did the thing you told me to do hailers and unbolted the primary fuel rail and cranked the car. i saw fuel squirt out of one injector only. i ohm.'ed all the injectors and they were all in spec. according to the haynes manual. so i think the injector is constapated and will not let gas out. as soon as it stops raning outside i will change that injector. (if i can find one) anyone have a low impeadance injector they don't need that they want to sell or trade for? let me know please. peace!

fLyiNgOuFeR

why is it that on almost every rx-7 once u fix one problem, another one pops up and says "hello! i will be ******* with you all day and maybe even longer!" im glad this is'nt my rx-7. my rx-7 is running perfect ryte now. i hope i can get a digital camera from santa and show you guys the headlight conversion kit i made. i wanted some feedback from other fc owners and was hoping to make a couple of dollars off it.

HAILERS

Before you buy a new one, why don't you just swap that primary injector with one of the secondary injectors. If all is well, the car should idle like a normal car. Just won't work for flip under hard acceleration around 3800. That way you know that it is indeed the injector. Those should be three ohm injectors since you said you have the solenoid resistor pack. In fact if you swap the injectors and the secondary one works in the primary spot, you should be able to drive the car and it should give you no problem as long as you drive like an old lady and don't get on it. Should be able to go to 6-7000 rpm as long as you do it in a gentle take your time manner. That'll give you the time to make a good buy on another injector and not rush into it.

fLyiNgOuFeR

WHAT!?!? are you listening to yourself? because that is such a good freakin idea!!!! man why didn't i think of that. you see, thats why i thanked you so many times. thanmks again. i'm gonna do that as soon as the rain stops trying to wash the paint off my car.