bought a 94 si, was turbo d16, the guy chipped it, i assume for the turbo tune, but its no longer turbo. how do i tell what tune its running/chip it has?

 

Ask the previous owner what EMS was used.

 

the kid i bought it from doesnt know jack ****. he was the second owner, didnt even know that the check engine light ment there was a problem. how could i track down the original owner?

 

No matter what tune is on there now. If you are the person who removed the turbo. You now need a new tune. Crome, eCtune, Neptune or Hondata are the usual options. In order to know what tune is on there you will need a chip reader and the software to read it. Sometimes looking inside the ECU could give you a hint as to the Program in use. Hondata and Neptune chipped ECUs are different from older Crome & eCtune ECUs.

 

no, i didnt pull the turbo, the kid i got it from bought it with the turbo pulled. is there anything i should look for on it to denote it being hondata/neptune vs crome/eCtune?

 

Open the ecu and take a pic.

 

When you take the cover off and look inside an ECU, with the wire connectors to your left. The chipped or modified area of the ECU will always be in the lower right corner of the circuit board/ECU.

Here are a couple different examples;

eCtune or Neptune Demon ECU


Older Neptune RTP,

rectangle circuit board connected via computer ribbon, may or may not be mounted on ECU cover.

Hondata ECU

The circuit board you see above the Hondata board is the stock knock board (P30/P72) The P28 does not have a knock board.

Crome and older eCtune ECU,

 

alright. thanks very much. i'll pop 'er open and take a look soon as i get a chance. thanks for the pics, helps a ton