Vehicle Specs & ECU Tuning
1990 Geo Prizm
Subcompact Cars · Petrol / Other · 3 engine/trim variants
Engine & economy specifications
| Engine | Fuel | Transmission | Drive | MPG (US) | CO2 |
|---|---|---|---|---|---|
| 1.6L 4-cyl | Regular | Automatic 3-spd | Front-Wheel Drive | 22 city / 26 hwy / 24 comb | 370.3 g/mi |
| 1.6L 4-cyl | Regular | Automatic 4-spd | Front-Wheel Drive | 21 city / 28 hwy / 23 comb | 386.4 g/mi |
| 1.6L 4-cyl | Regular | Manual 5-spd | Front-Wheel Drive | 24 city / 31 hwy / 27 comb | 329.1 g/mi |
ECU tuning options for the 1990 Geo Prizm
Petrol engines are tuned mainly for Stage maps (where the ECU is supported in our database) plus DTC and readiness handling. Emissions-off is off-road / motorsport only.
How it works
Read the ECU with any tool (KESS, KTAG, Autotuner, MPPS, bench or OBD), open the .bin in Softechpro, select the services above, and the software applies the changes and recalculates the checksum automatically — ready to flash back. Coverage is strongest on VAG, BMW and Mercedes (Bosch EDC15/16/17, MD1, MG1, MED17, Siemens, Delphi). New accounts get 5 free files to test compatibility before buying. We do not offer manual or custom tuning — services are automatic where the ECU is supported.
Other Geo models
Explore tuning for this Geo
Specs sourced from the public-domain US EPA fuel-economy database (MPG in US gallons). Emissions-off services are for off-road / motorsport / closed-course use only; the operator is responsible for legal use in their country.