Please help I have been trying to get this car running for over a year now. I have a 93 fd used to be auto converted to manual car has started and ran before but never ran right. recently trying to fix my fuel temp wire now car wont start any help would be great thanks

things ive checked.

car has over 100psi front and rear double checked

car is getting spark

car shoots fuel when cranking (also tried starting fulid in throttle body)

tried ecu and map sensor on another car (ran fine with both)

 

I've been doin a lot of research lately. I will admit I am no expert but I would check for spark on all 4 plugs if you haven't done so already. Are you have a decent air/fuel ratio? You could be flooded.. Hope this helps

 

Sooooo, it ran fine when you swapped MAP & ECU? Seems pretty apparent that it's a Map or ECU issue.

 

You might want rethink this. He said he tried his map and ecu on another car and it ran. So there's no problem with his map or ecu

 

Ya know, I read that three damn times and still interpreted it wrong. I am now awake from my comma.

 

thanks for the replys peveryone i did check spark on all 4 wires

 

Tell us a little about your setup, what type of ECU? Single turbo or twin, hacked up wiring harness or a decent wiring harness. Did you double check all your work when you were working on the fuel temp wire? Id go back over and make sure every thing is in place. Also It might be flooded from all the attempts at starting and that could be your issue.

There are a billion reasons why a Rx7 will not start.

 

are you sure the wires are going to where they are supposed to ? if its not starting seems like a really bad timing issue . or flooded really bad issue .

 

PS. I mean spark plug wires

 

Just fixed my spark problem it was the circuit relay! Might want to check that while you're at it

 

I have 2 ecu's one chipped one stock i believe its 3a. Wire harness is alright kinda old its a auto to manual conversion. twin turbos simple sequencetial rats nest

 

So, what has changed? You had the car running before, but with a ton of codes, correct?

https://www.rx7club.com/3rd-generation-specific-1993-2002-16/engine-cuts-after-1-4-thottle-please-help-its-been-year-988677/

What did you do between when it was starting and now that it's not?

 

yes car has like 6 codes the only thing i can think is the fuelthermosensor throws the car into limp mode all ive done from then to now is install the brown/yellow wire but ive tried removing it and starting it still no go

 

If ether didnt get it popping, I would double check spark.
Unless it just didn't stay alive after ether burned off.

 

iv'e checked all four wires they all sparks seam pretty strong how can i check further into it. Im not even getting popping noise

 

thanks for the replys everyone. But would anybody have and idea im getting spark air fuel compression everyhing I need. still not even getting a poping noise at all

 

are you sure the spark plug wires are going to the correct plugs? did you try a little atf fluid in your spark plug holes (some guys use to do that back when I use to know a lot more then i do now i think to try to get a bit more compression in their engines after an engine flood i think)? What is your fuel pressure? how are you confirming that your injectors are shooting fuel when you crank?

if your getting spark (at the right time), gas, and compression; the engine should at least cough to a start or attempt to. engines arn't that complicated.

have you checked your crank angle sensor?

since you have access to two fd's, pull and swap the injectors and see if that is the problem. Hell just start moving stuff over one at a time until you correct your problem. Looks like your other post mentioned a TPS sensor, why not just swap over the entire throttle body for a few mins to see if that does anything.


oh and recheck compression and let us know what you get this time.

Does anyone know if a clogged cat or muffler will do this?

 

did you check the fuel pressure or just check to see if theyre spraying? mine had issues with starting/staying running when i had a leaking oring where my fuel pump connected in the tank. the injectors would still spray but my psi wouldnt go past 10

 

You might have flooded the car. Try this:

https://www.rx7club.com/showthread.p...44#post8201444

 

Update compression 100psi even both rotors. I dnt have access to another fd only that one time. I ddidnt check fuel pressure but I tried spraying starting fluid in the throtle body. Ive tried the unflooing procedure. Havent check cas but all 4 plugs are firing.

 

is your gas tank full? half full? how old is the gas (wouldn't have asked before since they started dumping ethanol in to our gas, gas gets old fast and absorbes a crap load of water...)? do you hear the fuel pump spool up when you turn the car to the on position? I would really double check the injectors and the fuel system.


btw: you didnt mention anything about if you double checked to see if your sparkplug wires are going in to the correct sparkplugs. Just cuz you have spark doesn't mean your sparking at the correct time.


P.S. you got a PM, check your inbox

 

Half tank gas i gotta check wires again. But as far as fuel wouldnt spraying starting fluid bypass bad fuel? I checked the fuel by cranking the car with the hose off

 

your charging your battery between starts right or are you jumping the car with another one when its idling?

Also, I'd unhook your MP to dp connection just to make sure your exhuast isnt clogged. What type of exhaust do you have again? if you still have a precat, id unhook that from your turbos (tis not like your car is starting or anything so it shouldn't hurt anything until you get it running for very long.)

are you sure your crank angle sensor is working and are you sure your crank angle plate is on correctly?

 

i have never started a car just on starting fluid. Found potential intake leaks via spraying starting fluid around joints though.

I'm not sure if your injectors are firing. perhaps the duty cycle is too high and is flooding your engine. Crap, my duty cycle multimeter is locked in a storage locker on the mainland unfortuantly. Do you have one? (bought mines from checkers auto parts like 9-10 years ago.)

 

yes