OK I just got a new engine and it was wired with the Turbo harness / and microtech mtx-8. I'll start of by sayin my Car is a 88 S4 Vert. I went to start it and it just spun with the Microtech connected. The Ecu was gettin power and all all 3 lights came on. So Un plugged the harness and when with my N/A harness from my last swap and she trys to start but it wont catch. The engine has a monster port on it 550 injectors primary and 860 secondary untill I can get my MTX-8 to work my 1680 will go back in the secondarys. This is drivin me nuts I need to have my 7 back up and running 2 weeks ago I need help on this on quickly. The car is gettin Fuel, Spark and Air, but just dont want to stay running. All emissions are removed so I cant figure it out...
The engine is a fresh built S4 monster street port or mini bridge, 3mm apex seals, C wieghted S4 Rotors, 860cc pri, 1680cc Sec. it was ran with a Trust manifold and wastegate (Greddy) and a T04E turbo pushing 10 psi of boost set through the Microtech MTX-8 on the Turbo harness from a Turbo TII Frame. At the moment I'm using a Stock S5 turbo and manifold. Any help will help me is the port job causing it not to stay running when it start. There is a hell of alot compression you can hear it and feel it when its being started. I dont have a video of it on my PC but on my phone and FB under early RX-7 owners club (group)...

 

It acts like it is flooding but fuel gets cut off after it fires with in 2 seconds. I started off with my N338, then I tried with my N332 which is installed now, it is doin the same with both. Some one said is sounds like its flooding I pulled the relay under the dash and fired till it was dry. Then I put it back in and it does the same thing that is in the video...

 

how are you firing it off stock computer and michrotech? just putting stock maf back on it?

sometimes on new motors, they need to be pull started to get going. even though it sounds like it has great comp, it will probably actually be low till you get it running for a bit. the seals need to wear in.

 

It has been broken in, I bought it used with under 2000 miles on it. When I step on the gas it acts like it's not responding but the Throttle cable is good. I have the stock computer and the MAF on it and all sensors, and wired with the N/A harness like I did with the JDM S5 engine. I'll try some brake cleaner like I did last time but it catches and shuts right off. That is what is killin wreckin my brain with this problem today!!!

 

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from what I could see I have no vacuum leaks, I put back my old ecu and still no change it dont wanna stay fired up. at the most 2 seconds and it shuts down. no emissions installed should I restab the cas??? I havent did that yet...

 

About the stock ecu and the Micro teco thats what the guy told me I had to do. I may have needed the single plug from the body harness in to it instead of all three. But it was the TII harness and my car is a 88 N/A vert so would you say that it would work. Even though it is a TII harness with extra clips that the N/A doesnt have???

 

If it cuts out after a couple of seconds then you should try jumpering the fuel check connector and see if its related to the AFM or the wiring which supplies the ground signal to the Circuit Opening Relay which governs when the fuel pump is to receive power or not after the car has started. So take a moment to insert the jumper wire and see if this is to any benifit.

 

Fuel pump you think???

 

I'm goin to clear my fuel lines I havent started the car in 3 months and I think it might be the premix that settled and is causing the problem!!!

 

ok fuel pump works fuel lines are cleared out still have the problem and think I figured it out. I have the plug installed backwards. The 860's on the secondary ports on top are plugged in the primary plugs. The 550's are plugged into the secondary injectors so it is shottin fuel into the secondary and such a large amount of fuel is browning the engine. Do you think this can be the problem???

 

yes

 

Since secondary injectors are supposed to come online at higher rpms and under load they won't provide much if any fuel at the lower rpm range.

 

I had the primary and secondary injector clips backward. It starts now but shut down. Its not fuel or spark. My engine has a big port on it. Will the stock ECU bug out trying to run it???

 

I'm going to rewire my Microtech back up to the vert with the TII Engine harness and see if it will work and leave the small engine plugs off the stock ECU instead of pluggin them in this time.

 

Ok figured out a problem The guy I got the engine from removed the FPR! Now I have it installed with the microtech MTX8 It acts like its not gettin gas. It fired up last night with Brake Clean in the vacuum nipple on the Intake Manifold. Now it we kind of figured to try out a new fuel pump relay...

 

Is the microtech hooked up to a relay that controls the fuel pump?.
What ecu you are trying to use?
What size of injectors?

 

Dude... Jumper the fuel check connector. Try to start it while that check connector is jumped. (You'll hear the fuel pump running.) Post a video of you trying to start it this way...

Do you have the correct impedance injectors?

 

Is the cas stabbed correctly?

 

It is hooked into the TII harness so I think it is. I'm using a N338 from my Vert then I tried using my N332 same thing happened. My Injectors are 860 primary 1680 secondary.

dwb87 Dude... Jumper the fuel check connector. Try to start it while that check connector is jumped. (You'll hear the fuel pump running.) Post a video of you trying to start it this way...

Do you have the correct impedance injectors?

It is the video with it connected.

JWteknix Is the cas stabbed correctly?

Yes it is. It ran for about 10 seconds until the brake cleaner was burned up...

 

Remember Verts in the Japan came turbo and you can run a turbo engine off of it, I know cause I ran my S5 JDM engine off of it before It popped an Apex Seal!!! I wonder cause I didnt do it earlier and thought about it last night could it no run due to the jumper on the fuel check it always on or no.

 

Got it to start the other night with brake clean in the pressure sensor nipple on the UIM. It ran for about 10 to 15 seconds till the fluid burnt off. I need to know if the TII harness is the reason the car wont run on the N/A body and harness. Even though I'm running the microtech thats tied into the harness. It is frustrating the **** out of me and Im heady to tack my Torque wrench to the car!!!

 

How about disconnecting the return fuel line temporarily and w/the fuel check connector jumpered and key to on check to see if gas comes out of the return line or not.