MavsFORMULA
03-01-2010, 04:07 PM
Im working on getting the engine tuned in my 94 Z in sig. Im having a reputable tuner email tune it off of datalogs.
We keep adjusting the fuel trim bc the BLMs are showing rich, but it keeps not having any effect. We are quite certain there's a mechanical issue, and Im hopefully about to install new O2's as those are the likely culprit. My maf is ported, and its been running rich since the last owner had it "dyno tuned". Im also seeing a bunch of false knock. I just installed an LT4 knock module, but it had zero effect on the 9* my PCM is pullin @ wot over about 3000rpm. The car also stumbles and hesitates @ part throttle under about 2000rpm. Im about to try a few things on the knock sensor(adding a 90* elbow inbetween sensor and block w/ thread sealant on both, then new sensor if that doesn't help, and possibly using an adjustable resistor w/ the desensitize KS mod-any chance there's a pt where you could eliminate false but still retard for a bad knock?), so Ill post what I find, but does anyone have any ideas about what will fix any of the three? Thanks guys..
Nick
We keep adjusting the fuel trim bc the BLMs are showing rich, but it keeps not having any effect. We are quite certain there's a mechanical issue, and Im hopefully about to install new O2's as those are the likely culprit. My maf is ported, and its been running rich since the last owner had it "dyno tuned". Im also seeing a bunch of false knock. I just installed an LT4 knock module, but it had zero effect on the 9* my PCM is pullin @ wot over about 3000rpm. The car also stumbles and hesitates @ part throttle under about 2000rpm. Im about to try a few things on the knock sensor(adding a 90* elbow inbetween sensor and block w/ thread sealant on both, then new sensor if that doesn't help, and possibly using an adjustable resistor w/ the desensitize KS mod-any chance there's a pt where you could eliminate false but still retard for a bad knock?), so Ill post what I find, but does anyone have any ideas about what will fix any of the three? Thanks guys..
Nick