If you are saying it has a fast idle speed that could be caused by a bad throttle position sensor, or a problem with the engine control module.
The fuel pump on your 1988 Chevy Celebrity is in the fuel tank.
The 1988 Chevrolet Celebrity uses distributor-less ignitions. Timing is controlled by the ECM, there is no provision for adjustments.
No there are shock absorbers on the rear.
The oil pressure sending switch on a 1988 Chevrolet Celebrity with 2.8L V6 is located on the bottom of the block near the oil filter.
Metal.
R12 unless it's been converted.
If your 1988 Chevrolet Celebrity has the V6 engine the oxygen sensor is in the middle of the exhaust manifold nearest the firewall. If you have the 4 cylinder engine the oxygen sensor is located in the exhaust manifold just above the exhaust pipe flange.
It on the back of the coil packs going into the side of the block.
The firing order for all of the Chevy Celebrity 4 cylinder engines is: 1 3 4 2
The 1988 Chevrolet Celebrity uses idistributorless ignition systems, the timing is controlled by the ECM. there is no provision for adjustment.
To locate the thermostat on a Chevy Celebrity follow the upper radiator hose to the coolant outlet, which is mounted to the top of the thermostat housing.
If your 1988 Celebrity has the 2.5L 4 cylinder engine the torque is 25 ft lbs. If you have the 2.8L V6 engine the torque is 23 ft lbs. This per my 1988 factory service manual.