It's hard for me to judge or compare any "scan tool" devise. A full fledge scan tool would be nice, but for the information we need - i.e. map, maf, ect, short & long term fuel trims, tps, fuel injector mS, etc., I think basic is probably better If your looking to purchase one. Dan from Missouri counseled me to look for new as buying used may not be up to date and getting up to date may be costly.
I'll continue to use what is available to me untill I can purchase something better.
Planning on Grooving a 1999 Malibu with 3.1 this weekend, after I replace the intake gskts, spark plug, wires, and fuel filter. I'll get before and after data as well.
Scott Castleberg
Pellston, MI