ok so i went bak to work on the 7 today and found that this ground wasnt hooked up to anything. does anybody know where it goes? or can it just go anywhere on the engine? and also i noticed my injector clip is broken can i just cut clips from any other car and rewire them into the harness or do i need specific rx-7 clips?

 

Is there a ground on the intake manifold still?

It's hard to tell from that angle and I don't know off the top of my head.

 

ground goes to the upper manifold I beleive, that would also be why it isn't hooked up in that pic????

Edit: Since we don't know what your problem is,well, that MIGHT be it - it might also be the fact that your missing an upper manifold and throttle body - hehehe

 

ok well the problem was that my injectors arent putting gas into the engine. someone a while bak said it could be my grounds and i noticed this ground wasnt hooked up to anything. this is the ground that is attached to the wiring harness, there is another ground wire that is by itself and it went from the tranny to the firewall. but this one im not sure where it goes to. and to specify the picture, the bottom part of the picture is the tranny

 

so where on the uim does this go to?

 

That is a very important ground...it allows the ecu to trigger the injectors. You'd have poor firing or no firing without it. IT bolts on top of the rear rotorhousing in one of the 2 bolt holes.

 

Rotary resurrection is right. I just replaced that yesterday.

 

thank god for guys like Kevin, Omee did it work

 

That appears to be the main ECU ground. Yep, it's important.

 

holy shyt! i lost this thread for a while!! thanks guys i will do this tommorow and hopefully my problem will be solved (after i get new injector clips due to mine being crushed and useless)

 

ok well i hooked up the ground and!!............. nothing i got nothing. help please!! what can it be? i got spark because i sprayed starting fluid and it fires up for a second or two before it eats up the startig fluid. one of my 2ndarie injector plugs are broken so it wasnt hooked up. but does that effect the primaries? i wont be using 2ndaries for a while(new rebuild 2000miles) so i figured i can fix the 2ndarie clips later when i actually need them.

 

You have left the electrical plug off the AFM. Reconnect it and try again.

Or your fuel pump is not working. Jumper the fuel pump check connector and turn the key to ON. The pump should run continuously now. Listen at the filler cap (cap off) for the sound.

Or you connected your fuel lines at the engine assbackwards. Swap them back to where they belong.

Make sure the EGI INJECTOR fuse is good.

 

no one ever remembers my advice, it makes me sad.

like Hailers said though check your fuel lines the fuel line off the filter goes to the forward lower steel line and the one to the firewall goes to the rear lower steel line. make sure your MAF is plugged in and try cranking the engine for 1 second and see if you can hear the fuel pump whirring by listening to the fuel tank.

somewhere along the line you aren't getting fuel and my bet it is the pump not running not your injectors since you have spark.

also try jumpering the fuel pump connector at the RF strut tower.

 

well my fuel pump does work, it is wired to a switch and it is a walbro so it whirrs loudly. my AFM is plugged in. what makes u think its not? the only thing is the fuel lines, u mite be right about that but my fuel lines arent like the original ones. the guy who had it before me ran the entire fuel system with rubber fuel hose. and the lines run thru a FPR with a pressure gauge attached. so its not really so simple to know which line goes where

 

Sure it is. Line from the filter is always high pressure from the pump, the other is low pressure return/drain. The injectors all need to see high pressure, and the fuel pressure regulator is the last thing in the system, and controls how much gets returned to the tank, so the return hose connects to it.

 

Even with a stock exhaust (which he doesn't have) you're not going to hear the fuel pump over the sound of the engine cranking.

That's a much better idea.

That sounds bad. Have you bypassed the factory wiring entirely? Do you just turn the pump on and on with a switch?

Because your symptom (starts then dies immediately) is exactly what happens if the AFM is disconnected. It's a common thing to forget so it’s the first thing to check.

Actually the fuel plumbing is very simple, and if you have a fuel pressure gauge then the fuel pump can be quickly and easily checked. Jumper the yellow fuel pump check connected, turn the ignition on and read the pressure gauge. It should be at least 36psi.

 

ok so the line off the fuel filter connects onto the lower fuel rail where the primaries are right? and the line that goes to the FPR connects to the higher fuel rail with the 2ndaries?

 

yes the entire system is bypassed but i had the car like that before the rebuild and it works fine. basically i flip the switxch and let the system build up pressure, then flip[ it off and crank the car until it fires up then flip the switch bak on. but point is my fuel pump works because i can hear it when i flip it on.

my car only started and dies immediatly because i sprayed it with starting fluid to see if the car had spark

my pressure guage reads around 40psi when i turn the fuel pump on so yes, i do have pressure.

 

well my fuel lines seem to be connected correctly so what else can it be?

 

when exactly did this start?

what did you do before this started?

check whatever wiring you messed with and go from there :\ it's a pain.

 

Since the afm plug is on.................I'd suggest you left one of the ECU plugs off (I've done that and had your symptoms) or there is a large air leak.

 

Even with a 1.5"(diameter) hole in my TID, my car would still run with some throttle. So..a large air leak can work fine :P

 

That's just a bad way to wire up the fuel pump. But that's a separate issue I guess...

Confirm that fuel is actually reaching the injectors by disconnecting the fuel return line, putting a container under it and turning the pump on. If no fuel comes out them you have a plumbing issue. If it does you have an electrical issue.

 

so why is it that nobody thinks it could just possibly be bad injectors? and yes fuel reaches the injectors because when i first put the engine in and turned on the fuel pump. the return hose that goes to the fpr popped off and started spraying pressurized fuel evrywhere.

 

i double checked and all my plugs are on