[Gmecm] Re: +AFs-Gmecm+AF0- 2.5L 151 TBI'ed +ACY- Working Great, but...

[David Allen]

In my experience, TBI engines don't fast-idle nearly as fast as a carb engine.  The ECM uses the IAC motor to add extra air to make the fast idle.  The amount of extra air is determined by coolant temperature.  There is a table in the calibration for this function.  If the IAC is frozen the engine will run fine but the idle will be fixed and not able to respond to changes in load or temperature.
Hppe this helps+ACE-
David



+AD4- Ok, got the check engine light figured out... got my oil pressure sender 
+AD4- figured out... only problem now is on startup it doesn't +ACI-fast idle+ACI-... 
+AD4- can anyone explain to me why this would be and what I should check for 
+AD4- (or how even works lol)...
+AD4- 
+AD4-    +ACo- Idle Air Control maybe?
+AD4-    +ACo- Is there a sensor that would send info to the IAC that it needed
+AD4-      to +ACI-fast idle+ACI- in the first place until the engine got +ACI-warmed up+ACI-?
+AD4-    +ACo- Does it only fast idle in cold weather?
+AD4- 
+AD4- Those are the only things I can brainstorm about it ATM lol...
+AD4- 
+AD4- If it is some sort of sensor, how would I test them to see if they're 
+AD4- working properly?
+AD4- +AF8AXwBfAF8AXwBfAF8AXwBfAF8AXwBfAF8AXwBfAF8AXwBfAF8AXwBfAF8AXwBfAF8AXwBfAF8AXwBfAF8AXwBfAF8AXwBfAF8AXwBfAF8AXwBfAF8AXwBfAF8AXw-
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