I just bought a used 1200cc injector and don't know where is the stock 8500cc injector. If someone could pont out or take a picture of it would be very helpful. Thank you

 

All 4 injectors are located under the upper intake manifold. The secondaries (unless i'm really tired) are the ones placed higher and farther apart, those are the 850cc injectors. Go to http://www.iluvmyrx7.com/ and download the manual to see a picture. luck

 

You bought one 1200 injector? If you don't know where they are at, I wouldn't suggest you replacing them. It's not an easy task and you'll be working around the rats nest.

 

i'm realllllyyy hoping he meant 1 set.

 

me too What you have to do is remove the elbow to the throttle body. Take off the tb, then the upper intake manifold, then the AVC (I believe that is what it is) that is bolted onto the lower intake manifold, and then the secondary injectors should be right in front of you. The primaries which are the 550cc are under the rats nest more toward the center of the engine and closer together.

 

The secondary injectors (850's) are much easier to get at then the primaries. Removal of the nest isn't needed, just pull the ACV & a few hoses...

 

Ok now I got another problem? I install a used 1200cc injector that I bought from another FD owner and the car idle very rough like it's run only one rotor. Smell of gas and smoke( gas drip on the dp) filled my garage. I went back digging the injectors to see if look ok, but when I take the injector nearest to the airpump out and find the plastic tip and rubber is still in the rail.I carefully try to take it out with and small wire,as soon as I got it out the plastic tip fell down somewhere(can't find it). I put the stock 850cc back and the engine run great except the gas leak somewhere but I don't know where it is leaking from. PLEASE HELP ME!!! I screw up badly.

 

please help

 

well if you just put in one 1200cc injector, it should sound like crap and idle badly. Check all the fuel lines for a gas leak. There are two injectors per rotor, or four injectors total. There are two primaries, and two secondaries. If you just replace one of the two secondaries, that one rotor will be getting more fuel than needed (i think), or at least more than the other rotor. Either that, or the injector you installed was not installed correctly, which would result in the engine running off of only the other rotor. But don't the secondary injectors only inject under full boost?? Someone else?

 

Something tells me you should uninstall that injector..put the old one back in...and take it to a reliable mechanic, dude.

You don't want to kill your investment by trying new things for the hell of it.

I like to do things myself, too..but for some things, I'd rather WATCH someone else who's done it before first.

Just my opinion....I'd hate to see you kill your engine...

 

Dude, do not turn your engine on again!! Find the fuel leak! One drop on the exhaust manifold, the precat, or a spark and your **** is toast!

As for the injector, the computer isn't smart enough to know what injector is put where, it just uses the sensors to determine the duty cycle that it needs to perform on the injector and a best guess A/F ratio map assuming that the stock injectors are there.

So if you replace only one injector of the 4, when the motor gets to that spary of fuel into the rotor, it will see a rich mixture, ok turn the duty cycle down, now the mix is lean, ok turn the duty cycle up. You need to balance the change, both primaries or both secondaries. If you did do this, you probably have a bum injector.

So your car will keep doing this like a friggen oscilliscope until it gets somewhere close which is not enough for your smaller injectors and too much for the large one. In short, you can very eaisly either detonate your engine or cloge your cat.

The tip on the injector isn't that big a deal, goto a junk yard or pull one off a smaller injector and pop it on this one. More of less like a gasket that allows the injector to maintain its seal but rotate in the injector socket.

So to check your fuel system, take the upper intake off, charge the fuel system by turning on the ignition, then shut if off, look for the leak, repair. Be very careful not to let the fuel pool on the ground or touch anything hot or get near sparks. Hell I don't recommend any of this at all, call AAA and tow it to a repair shop.

Good luck and hope you get it fixed without a fire!!

 

I put back the 850cc and turn the engine on to let the gas evaporate and drove it around. While I was driving I notice the secondary turbo has not boost and also the gas smell still exist (very little, might be the gas is still evaporating).