i bought a TPI some years back that i eventually resold to somebody else. im looking at the computer from that, and its a bit different looking that what is in my car at the moment. it was running a TBI thought so maybe it looks different? this "new" one is quiet a bit bigger and has 3 plugs in the side, two blue and one yellow. i pulled the prom out and its a delco part with aswa 1798 under delco. i looked for a short time but was unable to find out what this thing is for.. any ideas?