Tuning Trouble

agamide · Post by **agamide** » Sun Apr 06, 2003 2:31 pm

I have a 1991 integra gs with 3/4 drag cams and a reprogramed ecu(other things as well) that I can not get tuned right. At about 5% throttle, it spikes to lean, and when I down shift it spikes to lean. Any ideas??? -Adam

pills_PMD · Post by **pills_PMD** » Sun Apr 06, 2003 3:51 pm

add more fuel!!
have you ever used a wideband on the car??

agamide · Post by **agamide** » Sun Apr 06, 2003 5:21 pm

I have tried adding more fuel but it still spikes. I don't know if a sensor somewhere is bad or if the ecu fuel maps are set to low, so that it tries to reset to a lower fuel to air ratio or what. What is a wide band?

pills_PMD · Post by **pills_PMD** » Sun Apr 06, 2003 8:27 pm

a wideband oxygen sensor, it reads air:fuel ratio MUCH more accurately than a stock O2 sensor.

edit:

http://www.hondata.com/motecplm.html

DaX · Post by **DaX** » Sun Apr 06, 2003 9:41 pm

When you say reprogrammed ECU, do you mean it has a chip in it or do you have Hondata or another standalone/piggyback setup? Are you able to alter your fuel/ignition tables?

agamide · Post by **agamide** » Mon Apr 07, 2003 2:15 pm

I had my ecu reprogramed by prospeed, and I have piggy back apexi safc. I have not tried a wide band yet, but when it spikes to lean, I can feel the power loss and my temperature goes up. -Adam

pills_PMD · Post by **pills_PMD** » Mon Apr 07, 2003 3:46 pm

dyno tune it w/ a wideband!! that was the best couple hundred i've ever spent on my car. it has run infinitely better than before since i tuned it properly