diff --git a/pyren/mod_elm.py b/pyren/mod_elm.py
index 792702e..741dddd 100644
--- a/pyren/mod_elm.py
+++ b/pyren/mod_elm.py
@@ -1455,10 +1455,6 @@ class ELM:
         Fn = len(raw_command)  # Number of frames
         frsp = ''
 
-        # if Fn > 1:
-        #     self.send_raw('at cfc1')
-            # print 'cfc1', raw_command
-
         if raw_command[Fc].startswith('0') and uncutCommand in self.l1_cache.keys():
             frsp = self.send_raw ('STPX D:' + raw_command[Fc] + ',R:' + self.l1_cache[uncutCommand])
         elif raw_command[Fc].startswith('1'):
@@ -1468,28 +1464,8 @@ class ELM:
     
 
         while Fc < Fn:
-            # if Fn > 1 and (Fn - Fc) == 1:
-            #     self.send_raw('at cfc0')
-            #     # print 'cfc0:', Fn, Fc
-
-            # enable responses
-            
-            # if not self.ATR1:
-            #     frsp = self.send_raw('at r1')
-            #     self.ATR1 = True
-
             tb = time.time()  # time of sending (ff)
 
-            # if len (raw_command[Fc]) == 16:
-            #    frsp = self.send_raw (raw_command[Fc])
-            # else:
-            #    frsp = self.send_raw (raw_command[Fc] + '1')  # we'll get only 1 frame: fc, ff or sf
-
-            # if raw_command[Fc].startswith('0'):
-            #    frsp = self.send_raw ('STPX D:' + raw_command[Fc] + ', R:' + l1_cache[command])  # we'll get only 1 frame: fc, ff or sf
-            # if raw_command[Fc].startswith('1'):
-            #    frsp = self.send_raw (raw_command[Fc] + '1')
-
             if raw_command[Fc][:1] != '2':
                 Fc = Fc + 1
 
@@ -1528,12 +1504,6 @@ class ELM:
             frames_left = (Fn - Fc)
             cf = min({BS, frames_left})  # number of frames to send without response
 
-            # disable responses
-            # if cf > 0:
-            #     if self.ATR1:
-            #         frsp = self.send_raw('at r0')
-            #         self.ATR1 = False
-
             while cf > 0:
                 burstSizeCommand = ''
                 for f in range(0, cf):
@@ -1593,12 +1563,7 @@ class ELM:
 
             result = responses[0][4:16]
 
-            # receiving consecutive frames
-            # while len (result) / 2 < nBytes:
             while cFrame < nFrames:
-                # now we should send ff
-                # sBS = hex(min({nFrames - cFrame, MaxBurst}))[2:]
-                # frsp = self.send_raw('300' + sBS + '00' + sBS)
 
                 # analyse response
                 nodataflag = False