Hey this is my first thread so bare with me. I have a 87' RX7 NON-turbo and just swapped a S4 JDM 13BT into my car. The problem is that it ran fine for about a week. It some times flooded but not to bad. One day I took it out to show my car to my nephew and he like it. Then when I got home it was fine. The next day I tried to start it to go to work and then it would not start. I tried to start it for about three days, trying to unflood it. It then would start but it seems to run crappy like there is not enough fuel.

Then I decided to run the US N326 ECU and now it runs fine with alot of smoke. The Turbo ECU would start and the compression is fine but it runs really crappy. I am using the NON-turbo engine harness. I do not have the turbo boost sensor(n318) yet and do not have the turbo AFM. What could cause the Turbo ECU not to run properly and the NON-turbo ECU to work fine?

I have read many threads and still do not know what wire to depin. They said to remove the PS swith wire(1R) but I am still confused. Please help. Thanks.

 

The N326 is working better with the original non turbo afm and non turbo boost/pressure sensor is the first thing I can think of. The sooner you get the turbo afm and boost sensor the better.

Why did it run better a few days ago? Not sure. If your car has no pwr steering there probably will be no problem with that pwr steering wire. Maybe later, as in tomorrow I"ll give you some clue about that particular wire. Smoke could be ???? too rich? or maybe the turbo is leaking oil?

This might help some: http://www.teamfc3s.org/info/articles/idle.html

Might do a Search(you) on N318. Seems I remember a problem with those by someone.

 

Also I do not have the O2 connected because I do not know where to connect it. I will check if the Knock Sensor is not on in the NA motor. That could be where my O2 sensor should be connected to. I just bought a Turbo Boost sensor and its on the way. I still need the Turbo AFM. I do not have the BACV because I have removed it.

 

The na motors do not have a knock sensor. Personally, I would not bother to find and install a knock box. Knock box on a turbo car is located in the footwell of the passenger and up and to the right. Really, forget about it all together, please. I removed the knock box after I installed it. Used it for a year or so. I've an attitude about it's functionality. Predjudice on my part maybe.

The knock sensor on your turbo engine should be screwed into one of the rotor housings above the sparkplug area, or if a series four turbo screwed into the intermediate housing on the spark plug side of the engine. One wire sensor.

Newer cars on the hwy have knock sensors whether turbo or na. One on each back of cylinders. More sophisticated electronics now days. In other words, THEY work.

 

What fuel injectors are you running?
Does your harness has the fuel injector resistors in it?


-Ted

 

I am running the Injectors that came with the motor and it should be running Low impedance. I do have the fuel injectors resistors and it is connected. The strange thing was that it was running fine on the ECU(n318) for a while(like about 5) days and now it does not work well at all. It starts after I do some unflooding steps but it runs really crappy. I did not change anything on the motor, I just used the NA engine harness.

 

********* I just used the NA engine harness**********

You've stated that a couple of times. There is nothing wrong using a na harness on the turboii engine. I have a 87 na converted to turboii and it runs just fine and dandy. The difference is I'm using the turbo afm, N332 and boost sensor also. I'm writing this because you seem apprehensive about using the na harness on the turbo engine. I also never did a thing with that pwr steering wire. No alteration needed for that if no pwr steering is on the car.

The voltage output of the non turbo pressure sensor is dramatically different than the turbo boost sensor. One is a one atmosphere sensor and the other two atmospher sensor.

Not all 87 used low impedence injectors. Only the early half of 87 have low impedence. Later 87 use high. You would have done no harm if you have high on the engine and a resistor package. But at sometime it would need to be corrected to make things right.

Your confused about the 02 sensor. That sensor goes into the downpipe about a half foot from the turbo. Not related to the knock sensor on the left side of the engine at all.

 

Yeah I got them Both now, the turbo AFM and the Boost sensor and now it works fine but there seems to be smoke. Maybe a bad Turbo? There is no Shaft play.

I drive it for a while and it does not smoke. When the car is boosting then after that it idles like on the street and then a heavy cloud of smoke comes out. When I drive it normally its fine for a while. When I get home and let the turbo cool and then it smoke again after like a minute of idle.