hellisholds77

ive got an 88 gxl and im doing a tii swap and i went to install the computer and the wire harness and i found out that the harness that does throught the dash doesnt fit in the turbo ecu. is this becuase the engine/ecu is s5? or are they just THAT completly diffenent? and how can i tell if the engine/ecu is s5?

HAILERS

Series four and series five wiring are not compatable. To mix them you have to WORK at it a lot.

hellisholds77

but s4 n/a and turbo ecus have the same clips? and s5 have their own clips? how do i know if i have an s5 motor?

HAILERS

The three electrical plugs that connect to the series four ECU will not mate with a series five ECU.

A series four Turbo EM harness will mate with a series four non turbo EM harness and also will mate with the FRONT harnesses two ORANGE colored plugs. BUT the pinnouts in the plugs are not exactly the same, so if you put a Turbo EM harness in a Non turbo car, then you have to rearrange the wires in the two plugs on the EM harness that mate with the FRONT harness.

A series FIVE turbo engine has the knock sensor on one of the ROTOR housings. On a series four engine, the knock sensor is on the front, left side of the Intermediate housing. That's one way to tell which series.

Series five OMP is Electrical. Series four is.............not electrical in any way shape or form.

IF your still confused..........PM RETED and I'm sure he'll give you an answer.

hellisholds77

ok, ill pm him, but the plugs for the front harness doesnt even connect in the turbo ecu. and i wasnt saying thats how i wopuld figure. it was just really confusing and it was a thought and possibility