Once again I'm stumped and need everyones rotory knowledge. Well my Fd has been the bodyshop for the past 2 months to get some work done. The car was moved in and out repeatedly and did flood several times. Which I unflooded several times. Know when the car is finally done I get in and try to start it but the car just revs to about 2500rpm and just dies. I figured fouled plugs maybe flooded so did the unflooding procedure and put new plugs in, still does the same thing. I then tried swapping my RX7.com ecu out with a stock ecu, still does the same thing. Its weird when the car is running briefly (for about 2 seconds) when I depress the gas pedal I basically have to floor it to get the engine to rev at all, but it still dies out. It almost seems the engine just burns the primed fuel then runs out of gas and dies. I check all the fuses and all the relays, the fuses all look good and the relays click. I tested my fuel pump by jumping the ground pin and the F/P pin in the diagnostic box and you can hear the pump working. I pulled the plugs a few times during the diagnosing and the plugs looked relatively dry, so no indications of flooding. I also checked for spark and thats working. I'm lost. Could it be because I had been pulling the Circuit relay several times to unflood the car that it could of been damaged? I did check it, and it was clicking ok. I was also told that just because a relay clicks it doesn't mean its passing current, does that sound right? I dunno, I'm getting a little frustrated. Any help would be appreciated. Thanks..Tony

 

Hey 93FD3S,

You may want to check your Accelerated Warm-up System. If your vac hose came off or the solenoid valve went bad this would cause your problem.

 

that same thing happened to me yesterday and the mazda dealership called me today saying i have a low compression coming from one of my rotors. meaning rebuild or new motor with hoses and all. now i'm most likely to sell the car.

sucks doesn't it...i'm not saying this is what you have but your story is EXACTLY the same as mine...just me two cents


Chuck

 

Check to see if the vacumme hose didn't come off the map sensor. It is up on the firewall by the brake booster. Maybe you bumped it changing the plugs?

Just a thought.

Jeff B

 

What happens if you jump the fuel pump circuit, then start the car? I don't know if this is safe or not... just throwing ideas around. I was thinking that maybe for some reason your fuel pump is not operating after you start the car.

 

first of all... why did it flood so often? leaky injector? thats the first thing i would look at. that is NOT normal.
when was the last time you changed the fuel filter?
like paw said... are you sure your pump is working while car is on? under the cruis control there is a conection with a white/red wire (10awg i believe??) if you can run a hot wire from there back to the pump it would eliminate the relays. if car runs fine... then check the relays.
also... does the car go up to 2500 and THEN imediatly die? or does it die AFTER you blip the throtle/ when it is done warming up?

 

thanks for the replys so far guys. I replaced the fuel filter about 8 months ago. The car kept on flooding because the body shop kept on moving the car in and out and turning the car off without letting the car fully warm up. I also don't think the fuel pump is working when the car is running for the brief moment it is, because if I open up the gas lid and take off the gas cap I can't hear the gas pump working even with my ear next to the fill hole. Basically the car will start, rev up to about 2500rpm then die right away without me even touching the gas pedel. I probed the white with red strip wire under the fuel pump relay and there wasn't any power going to it so I think thats were my problem is. But I checked all the relays and they all clicked. Is it possible for the relays to click but not pass any current? rxrotary2_7 you mentioned a white with red strip wire under the cruise control connection. Its on the drivers side next to the Brake booster ...correct? I'll have to check for it, because the same color coded wire under the fuel pump relay isn't getting any power...hmmm....Any more ideas anyone? Thanks..Again..Tony

 

Just start from the fuel pump power and trace your way through the circuit until you find the bad connection or relay. That's my advice.

 

sounds to me like one of teh relays might hav a bad pole/side on it. it can lodge open and thus flooding the car.

moving an fd and not letting it fully warm up is not that big of a deal. i do it often and have never had any problems out of mine.

i do not know of too many more things that it could be, however, i do not think that your engine is crapped out..



hey paul,
how's your car coming. sorry to ask if it is repetitive, but i am not over here too much any more..

louis

 

Louis,

I sent you a PM. Also, I don't know if you saw my thread.

https://www.rx7club.com/forum/showth...5&pagenumber=1

Paul

 

I had the same problem. Turned out that the igniter on my car went bad. May be you have the same.

 

what you described the shop did by moving it back and forth would/should not cause flooding.
under the CC... from that point BACK there are no relays. do you have a wiring diagram? ill see if i can pull out my manual and scan a copy of the page and post it for you.
replacing the relay up front with a known good one is a good idea for trouble shooting.

 

My .02 is pull your trunk carpet back exposing the deck lid that gives access to the top of the fule tank there will be a wiring harness running from there to the bottom of the drivers side panel... if you look under it and pull on it you will be able to unplug the harness... do this... remove the covering on about a 3" strip so you can get your hands on the wires. there are 2 big ones and 2-4 smaller ones (can't remember the total amount) either way find the one that is obvoiusly your neg. wire... the one that doesn't have red on it out of the two big ones... tap that wire and solder an extra thicker wire into it... Find a place to ground your added wire and wrap everything back up and make it look good and don't forget to reconnect the harness and you should be in better shape than you were in before... my car was doing the same thing untill I did that and it made it go away...
Total time: 30 min
Total cost: less than 2 bucks

Hell if I knew about doing this before I would have done it a long time ago regardless of any problems I was having...

Take it easy,
Ryker