Driving down the highway, Cruise control will only sometimes engage in 5th gear, downshift into fourth maintain speed cruise will work every time. Hooked the Snap On scanner up to monitor the cruise module, in 5th gear it flashes yes/no rapidly under cruise enabled and constant no under cruise engaged. Downshift into fourth the cruise enabled stays a constant yes. Then hit the set button cruise engaged says yes, and it maintains speed. What could be causing this problem?
Cruise Servo/Module has been swapped for another and switch on column has also been changed. Holding back on VSS until I can better narrow down the root cause. Tech2 Scan tool does not display pulses per mile information and says exactly as Snap on Scan tool says Wiring to speed sensor has 5v reference
cruise also will stay engaged for 3rd gear
when engage in 5th gear it might stay engaged for seconds or a mile and when it disengages it drops gas pedal abruptly not like when you turn off cruise normally in gear
Car is a 5 speed Pontiac Sunfire GT with a 2.4 liter engine. Transmission is rebuilt and this problem happened before trans was rebuilt.
Tuesday, January 22nd, 2013 AT 6:55 AM