Code 48 Advise Please!
So my 94 3.9 keeps throwing a 48 code
* I've cleaned & swapped the idle air control motor (Stepper motor)
* Cleaned the intake
* Put new air lines on the lead to the stepper
* Reset base idle several times
* Cleaned up the speed sensor
* Did continuity tests 15, 16, 25 all passed (Test 25 I'm not 100% sure I did correct)
I'll clear the code and drive the truck... it will run great, then after driving at least 5 minutes and pull to a stop (either parking or stop sign/light) it will idle very rough then smoothes out as the 'Check Engine' appears
ANY THOUGHTS? Help is greatly appreciated
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