There are multiple things that can go wrong with cruise control, you need to be more specific as to what is wrong with the cruise control in your car.
The timing on a 1987 Chevy Celebrity is controlled by the engine control module, there is no provision for adjustment.
Timing on a 1987 Celebrity is controlled by the engine control module, computer. There is no provision for adjustment.
The 1987 Chevy Celebrity has distributor less ignition. The timing is controlled by the engine control module and there is no provision for adjustment.
The MAP sensor on a 1987 Chevy Celebrity is mounted to the firewall near the right fender.
The timing on y our 1987 Chevy Celebrity is controlled by the engine computer, there is no way provided to adjust it.
The idle speed on a 1987 Chevy Celebrity is controlled by the engine computer, there is no way provided to adjust it.
If the cruise control on your 1987 300ZX does not work, you might have an issue with the cruise control fuse or wiring. You could also have a problem with the switch that turns the cruise control on and off.
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The fuel filter on a 1987 Chevy Celebrity is next to the fuel tank on the driver's side of the car/
All 1987 to 1990 Chevy Celebrity engines use distributorless ignition. Timing is controlled by the engine control module in conjunction with the ignition module. There is no provision for adjustment.
The heater core in a 1987 Chevy Celebrity is in the heater plenum to the right of the hump and below the glove compartment.
To determine if your 1987 Chevy van's cruise control module is bad, check for common symptoms such as the cruise control not engaging, disengaging unexpectedly, or not maintaining speed. You can also inspect the module for physical damage or corroded connections. Testing the module with a multimeter for proper voltage and continuity can further confirm its functionality. If necessary, consult a professional mechanic for a thorough diagnosis.