So I recently purchased an 89 corolla sedan with a 4agte swap. Now I'm not new to the boost/swap world. I've had many dsm's. Anyway I'm new to yotas they are a different animal all together. Keep in mind I've got the orange top injectors, upgraded fuel pump, running 10psi on a t25.

Problems as follows.

 

1. Speedo tach not working

2. Running very very rich (blows black smoke and backfires)

3. Bucking at mid throttle

4.engine codes I pulled:

-12-

-21-

-41-

-42-

-43-

 

Any help in these issues is greatly apptrceated..if i have to i will go with an ems. But if these issues can be fixed with simple solutions I'm all ears..I've done extensive searches on google ..I've found some helpful tips but nothing in depth to what I'm looking for.

I can try... :)

 

Keep in mind I've got the orange top injectors, upgraded fuel pump, running 10psi on a t25. - Orange top injectors, what are these/What size/cc's per minute are they? What ECU are you currently running? The stock 4AGE ECU cannot handle this setup.

 

Speedo tach not workin - Is the speedometer drive cable connected to the gearbox, to the back of the instrument cluster & isn't broken? The standard 4AGE tachometer will not work properly with a turbo-conversion, this can solved by fitting a 4AGZE instrument panel.

 

Running very very rich (blows black smoke and backfires) - Not sure, going to go with over-fueling/incorrect ignition timing for this one.

 

engine codes I pulled:

-12- This means no RPM signal,(no Ne signal to the ECU within 2 seconds of cranking or no G signal to the ECU when engine speed between 500rpm & 4000rpm) check your distributor/igniter circuit.

-21- Problem with the Oxygen Sensor circuit.

-41- Problem with the Throttle Position Sensor circuit.

-42- Problem with Vehicle Speed Sensor (no SPD signal when engine speed above 2800rpm).

-43- No starter (STA) signal to the ECU until engine speed reaches 800rpm with vehicle stationary..