hey hows everyone doing.....??? just finished my turbo 383 build on 97 camaro ... car runns pretty good but i seem to be running a little rich while cruising normal.... had a mail order tune done on the car....WOT with 15psi boost yeilds 12.1 a/f fuel but running rich and stumbling at low rpms... i took a short datalog of normal driving around the block with a dashdaq... wwondering if someone would be able to take a look at it for me..... i could log the a/f just yet but i hope what i have can yield some info....

some info on car

97 camaro
383
afr 210cc heads
m6
single 70 mm turbo
60 lb injectors


the first log is with coolant temp and the second log is with MAF

cant log to many parameters together

http://www.4shared.com/file/nF9AbnFl/log0001.html
http://www.4shared.com/file/R-zDi0p9/log0002.html

 

24 views and nobody can help? Trying to diagnose this car with little tuning knowledge if very difficult lol...

 

Appears LTFT1 is maxed out at +25%, and in places its adding as much as 50% more using the STFT1 (average added is about 11.4% using the ST's). I'm assuming from the nomenclature that is Bank 1. Looking at Bank 2, its not as bad, adding an average of 16% with the LT and close to 0 (average -1.3%) on the ST. You need to sort out why its pouring all that fuel in Bank 1.

 

Thank you fir that response I appreciate your time... What could be a cause of this.?? Could it be a tubing issue.... Possible exhaust leak or maybe a bad o2 sensor?? I know that at WOT the car seems to run perfect no hesitation and pulls incredibly ......I haven't logged a WOT run yet would that help? Thank you again

 

If its really running at 15.1:1 WOT with 15# of boost, I wouldn't be hammering it until you figureout what is wrong with it. You're lucky you haven't blown it up already.

Do you have a wide band O2, or are you ready the factory sensors with the dashdaq?

 

Injuneer I apologize I need to fully read b4 I post... a/f is at 12.1 not 15.1 my mistake...sometines typing on this phone gets hard... Yes I'm reading a/f with aem wideband

 

resealed some v-bands and switched o2 sensors...
took 2 more datalogs

http://www.4shared.com/file/MS7zVX9w/log0006.html
http://www.4shared.com/file/WGCU85cA/log0004.html

 

It also seems that the only tine the STFT are at zero is in between shifts.....

 

Any ideas?? Anyone???

 

Still adding 25% on the left side using the LT's and 20-50% using the ST's. Right side is still adding and average of 14.3% with the LT's, and nothing with the ST's.

You have to figure out why the LTFT's are screwed up.

 

I know thats what I'm trying to narrow down ... But I'm not sure of possible solutions.... I have swapped injectors from side to side thinking possibly a leKy injector and haven't datalogged yet.... What other measures can I take to solve this? Thanks again

 

Focus on the left side. Why does it have to add 50-85% extra fuel? That's a massive error. The right side could be just a problem with the MAF calibration, a vacuum leak, etc. But the left side is massive. Its a "false" condition if its running rich and stumbling. That much extra fuel could be washing down the cylinder walls. Check the oil for gasoline buildup.

Do you have extensions on the O2 sensors?

 

No I do not have extensions on the o2's..... Do the actual voltages look ok on the o2 sensors? And I blieve the log has some info on the MAF as well are those in normal range ...?? I apologize for the questions I'm just lost and nobody neAr me has knowledge of lt1's. I'm located in longisland ny...