(mophead)

ok i got my car running and now the injectors hang open ill dissconnect the injector resistor i hear them close the car will start then shut down due to no fuel has anyone seen this problem? if so some help would be nice

Aaron Cake

iTrader: (1)

It helps if you post in English.

Are you saying your injectors are locked open? How do you know this?

If the injectors were locked open so much fuel would enter the engine that it would die almost immediately and it would drip from the exhaust.

HAILERS

There is NO injector resistor on a series five car. That is the car you say you have in your profile. So what you tried to say, ain't a happening.

Free, online, FSM available for downloading from this site. Both S4 and S5.

EDIT: You probably disconnected the Fuel Pump Resistor Relay which killed the fuel pump or the ability of that item to feed the fuel pump. An akward fuel cut switch all in all. Your car is flooding. On a series five all you have to do is HOLD THE PEDAL TO THE DARN FLOOR while cranking the engine. The fuel injectors are disabled if you do that.

On the whole, I make an EFFORT to put a capital letter where it belongs, put a period where it belongs and maybe throw in a comma here and there. Not perfect. Not close to having a MBA in English, but I make an effort. I also make a VERY LARGE EFFORT to ignore people who write in small letters, use no periods, commas and in general write gibberish. Not your problem. Just the way things are out west.

And I LOATHE people who get pissed off if someone writes in CAPITAL LETTERS, but has zip to say about someone using small letters thoughout the thread. I've other complaints. So little time.

(mophead)

ok lets try again the car on my profile is the car mentioned it is a 88 with all s5 upgrades so it does have a resistor I know the injectors are hanging open due to I hear them click when the ignition is turned on and when I unhook the resistor I hear them close and when I have the resistor connected it loads up ond fuel comes out the dp whitch is open so I was wondering if anyone would have a clue on this issue and if there is a miss understanding let me know and I will be happy to try and re explain myself

HAILERS

Ok. Let's all start over again. The Fuel Pump Resistor/Relay has nothing to do with the fuel injectors. That's about it. See your local Factory Service Manual wiring diagrams.

Your confusing the Solenoid Resistor Package on a early 87 car and all 86 RX cars. It was NEVER used on 88 cars. That item is in no way simialr to the Fuel Pump Resistor Relay on series four Turbo cars and to the best of my knowledge on all series five cars.

Your not hearing the injectors clicking. IF a injector was shorted to gnd and ON all the time, fuel would leak out of your exhaust flanges and tail pipe in short order. That's the only way a injector could be ON all the time i.e. if it was shorted to ground on the ECU side of the injector plug.

The Fuel Pump Resistor/Relay controls the Fuel Pumps voltage. It keeps the pumps voltage down around 9vdc when the car is not under Load, and up the voltage to whatever the alternator is putting out under load. During Start, the relay drops out and full voltage goes to the pump. Once started, the relay pulls in and puts the resistor into play and the voltage drops to approx 9vdc.

(mophead)

talking about the grounds and connecting to the ecu i have a chipped ecu i know nothing about you think that could be a area to search i have another stock ecu mybe i should check that and to let you know it is having fuel come out the down pipe but i unhook the resistor and the injectors close (i know this because it stops dumping fuel and the car will run then shut off due to no fuel)or is the reasoning for that due to the injector circuit has an open in its circuit so i assume its with the resistor

HAILERS

You could have a stuck injector, but it has nothing to do with the fuel pump resistor/relay package. That package only feeds the fuel pump when the engine is RUNNING or the key is HELD to START.

The attached jpg is from the free online series five diagrams. It shows the four fuel injectors and the ECU.

The B/Y wire feeds 12vdc to the injectors. The other wire on the injector plug goes to the ECU. The ECU pulses a ground signal to the injectors to open or shut them.

The B/Y wire comes from the MAIN RELAY. It's the ground being put on the injector that makes them open. If that wire (not B/Y but the other wire) is grounded, then the injector is open all the time as long as the key is to ON (pulls the Main Relay in and feeds the B/Y wire).

As you can see, the fuel pump resistor/relay is not in the circuit in any way.

Try the other ECU.

Of course if a injector was stuck open (really unlikely) and you pull the fuel pump resistor/relay's plug, then fuel will stop coming out of the stuck injector. Common sense. Pump turned off.

Force Fed

Try using a period every now and then, it's makes it much easier to understand you

So what you are saying, is that the car floods out when you try to start it w/ everything hooked up like factory, right? So you pull the power to the fuel pump, and it will start, burn all the fuel flooded in there, and shut back off?

(mophead)

"Correct" It might be a stuck injector and like said i kill off the fuel pump and then no fuel is supplied ill check it out this weekend when i have some time. Ill pull the injectors and i guess go from there.

FRFC3S

iTrader: (24)

I have an idea guys, this is how we can get to him!






what you need to do is pull off your upper intake manifold and send your four injectors to witch hunter they will clean and flowtest your injectors for you so than you know that your injectors arnt sticking anymore also i you could try buying a used set of injectors on the forums but i dont suggest that at all this is a common problem on fc rx7s for whatever reason im sure aaron cake or ted or hailers could tell you the reason why but like hailers has suggested try reading the factory service manual or using the search function to solve problems before you make a post thanks