Hi, i am new to this forum so hello everyone. I have a 87 gxl wich ik decided to do a trubo swap with a n/a engine. I used the n/a block with s4 intake manifolds and turbo ecu+wiring harness. I did a complete swap to a turbo except changing the block and body harness. The car did not run for long. It started up and kept stalling. And when i came to a point where it idled, when i gave it gas it would die immidietly. I also pulled my engine out today to do a rebuilt and turbo rotor swap. I need help trying to figure out a way to have this car running right.
-Jennair

 

Did you use the turbo MAF or the N/a one? That could have been the problem along with some vacuum leaks maybe? It's hard to say without knowing what troubleshooting steps you took up until now.

Sound like a fun project though.

 

I used the n/a MAF, but is the turbol and na different?

 

If the car is still in "starting" condition try running codes. That will tell you if you forgot to plug something in or if one of your components is bad.

I'm not sure if the turbo and N/A AFM's are different but that could be a problem.

Have you read the thread in the archives about doing the turbo swap?

*edit* It is in the FAQ at the top of the page.

https://www.rx7club.com/forum/showth...threadid=26647

 

This is what i want to do. Use a s4 n/a engine with turbo rotors, use a s4 n/a

ecu+wiring harness on s4 turbo intake manifold setup, lose the air pump and use block off

plates, also lose the twin scroll and use a upgraded turbo. What i really want to know is

can i use s4 turbo intake manifolds with a s4 n/a wiring harness-with air pump removed.

And add a S-afc to control the setup?

 

What an odd setup...Why not just go one step further and use the proper TII ECU and harness?

 

I spent lots of money on wiring harness and ecu(s4 turbo). I installed it and it didnt work, also the wiring harness was fucked up so im sick of wasting money. I have a n/a wiring and ecu that is in perfect condition to use.

 

I agree......Much easier/cheaper and way better results...........

 

you should have just swapped a TII motor in, you would save so much money and time. I would really consider i know you have put alot of work into it, but why waste more time?

 

Check that your fuel pump is not shutting off. You can do it by bypassing the AFM cut switch(little yellow plug on passenger side near strut). Just jumper it.

Ths will keep the fuel pump constantly running. That way you can see if it's the fuel pump or AFM.

If it still doesn't work then check your wiring harness for continuity and see if your injectors are spraying.

If you install an inline fuel pressure gauge you will be able to hopefully see of your getting sufficient pressure and constant fuel.

 

did you leave the exhaust diffusers in the n/a housings?? If so get those bastards out of there. Do you have a TII pressure sensor? TII afm?

 

AFM's are interchangable within the same series. NA/Turbo doesn't matter really.

 

a word of caution about using a NA ecu with a turbo aplication. the turbo ecu actually "sees" you boosting and will retard the timing ,and add extra fuel acordingly for an extra "safty" margin.... the na ecu doesnt see positive manifold pressure.....

you would definitly HAVE to have a safc to control it for sure, and larger injectors! im not sure if timing will need to be adjusted or not...

 

so you can use the na harness for the turbo but is that all or is there additional wires you have to run cause my 87 na has the connector plug for the boost sensor

 

oh and i have an safc2 already installed

 

well the na harness doesnt have any knock sensor like t2 for one thing......
the BAC are in differnet spots , wires wont reach the right places for a coupel things i belive.....

boost dinner,i dont know..... what is your setup??? i dont know what your tring to do,r u using a t2 motor??na with an aftermarket turbo?? t2 ecu?? na ecu? what is your "setup"

 

getting a t2 with t2 ecu and na harness but i have a safc2 but would like to learn more about the rtek programs

 

extending wires are no probblem but pinning them into the ecu i hate had to do it plenty of times on hondas for vtec

 

well see i already pulled the motor out, im rebuilding it. I need to run a n/a block with a turbo setup and i need to choose a route

 

How did you match the manifolds? What filler did you use after you cut up the TII intakes? Chances are you had a MASSIVE vac leak from all that screwing around and hacking things together, which is why it wouldn't run.

 

i used jb weld