I recently got an 86 RX7 (no turbo) and I'm having problems with the engine flooding itself out . We've narrowed it down to either the fuel injectors, fuel pump, or ECU. So we decided to first replace the fuel injectors. I went hunting online and found the injectors for a really good deal at thepartsbin.com. However, it asks me for the CHASSIS RANGE chassis range. I've looked all over my haynes manual, the engine compartment, etc. and can't see to locate this. Anybody have any idea what it is or where I can find it? The options they give me are 550168 or 550169.
(I'm a amatuer, in case you could not tell)

 

They are referring to the last digits of the VIN#.

 

550168's are the ones you want. low impedence vs high.