Hello,
I have been playing with a 2bar map sensor and tuner cat(94 LT1 in SD mode). I doubled the engine displacement so I could cut the ve cell values in half. It starts up and idles fine but it dies when I hit the gas. It only does this when I set the ve cell values low (where they need to be because of the doubled displacement). If I set the cells to 60+ it will rev up (very rich of course). When I look at the data logged I show that the injectors are being "shut down" until I lift off the throttle. Does anyone have any ideas what function(s) could be causing fuel cut off?

Thanks,
Sean

 

I have found that the engine will run without any MAP or MAF sensor. I believe it is running in Alpha-n mode (TPS vs. RPM). The funny thing is that the TPS vs. RPM table in tunercat ends at 600 rpm. If I change values in this table it affects injector pulse width through out the entire rpm range. It's almost like it's trying to use an alpha-n calculation to see if the VE vs. MAP value is in the ball park. Since I'm running a 2bar map sensor of course it's no where close where it needs to be. Does anyone know of any work around(s)?

 

Lets keep this one up top...

Nobody has any ideas?