My fuel economy is terrible and I just had a complete tune, Whats wrong?
A “complete tune” is not always a complete tune. It is most likely just a high power run, that is run the car on the dyno and suck out the most power you can and make sure it doesn’t knock. Usually advance the timing, lean it out and make sure its a safe tune. This is done on full throttle usually in fourth gear (as stock diff ratio is 4:11) which is the closest to 1:1. Now think to your driving habits, how often are you on full throttle for the entire duration of your tank of petrol? 5% of the time seems reasonable but your entire tune is based on full throttle and max load, certainly not your ideal tune as far as economy. You should read up on how to use the Map Tracer here before continuing any further as you need to use this as part of the tuning process. Speak to the tuner if you still have terrible economy. Ask to have the light cruise AFR’s check on the dyno with a wideband sensor or even better as them to come for a drive with you wide a wideband sensor up the exhaust. Show the
A “complete tune” is not always a complete tune. It is most likely just a high power run, that is run the car on the dyno and suck out the most power you can and make sure it doesn’t knock. Usually advance the timing, lean it out and make sure its a safe tune. This is done on full throttle usually in fourth gear (as stock diff ratio is 4:11) which is the closest to 1:1. Now think to your driving habits, how often are you on full throttle for the entire duration of your tank of petrol? 5% of the time seems reasonable but your entire tune is based on full throttle and max load, certainly not your ideal tune as far as economy. You should read up on how to use the Map Tracer here before continuing any further as you need to use this as part of the tuning process. Speak to the tuner if you still have terrible economy. Ask to have the light cruise AFR’s check on the dyno with a wideband sensor or even better as them to come for a drive with you wide a wideband sensor up the exhaust. Show the
