tuning question

[dsg gts]

ok my question is . how bad did i screw up my sct tune? ok i have a 95gts. when i bought it it has the trickflow h/c/i setup on it 76mm mas'70mm bbk throttlebody with egr, bbk longtubed into an x pipe and full cobra 2 1/4 tail pipes. since then i took a 91 short block transplanted all of the parts from the 95 engine to the 91.so i raised my compression a bit. also it now has 2 1/2 in flowmaster 3 mufflers that dump infront of my rear end.i also totally took off the egr setup. i left the canaster setup on so that the fumes get sucked out of the tank .all of the sensors are new also replaced the harmonic balancer and put in an allumium driveshaft.solid motor mounts and solid trans mount. now it has a hard time idleing but over 2000 rpm this thing flys. the timing is set at 14 degrees advance i run it only on shell 93 preimum. it runs 12.5@108 in the 1/4 mile. should i pull out the sct chip? or get it retuned. I.m not sure. will i hurt it by running without a tune? i want to put a blower on it this next winter. so then i figured i'll for sure have to have it done. just looking for input.

 

[dsg gts]

here is what i did today. i have a spare computer so i just unhooked the one with the sct chip in it. then hooked up the stock computer. we took it for a ride. no driveabilty issues. I took it to my favorite place and opened it up. she flew. no offical times yet as the local drag strip isn't open yet. I'll see how long this lasts. I'll let you know when i get the next time slip. also if i have anymore issues.

 

[2002BLGT]

Sounds to me like you just need to get the chip reburned , but IMO you did not change enough to cause drivability problems so the initial tune was probably off some to begin with

 

[ryclef331]

If you yanked the EGR and it wasn't turned off in your tune, thats probably your issue.

 

[dsg gts]

yes that's the problem the tune was done by the last owner. he doesn't remember what went on. all i have are the dyno sheets. not much info there. how does a re burn work? do i have to send the chip in with everything i have done along with it?

 

[ryclef331]

Well, my chip was done by my local dyno tuner. I made a change, I went back to him with the car and he'd update it for the changes after a pulls on the dyno. Most tuners won't touch someone elses tune...if they even use the same software. Turning off the EGR is a simple click of the mouse though so find out who burnt the chip originally and get in touch with them