In the computer.
In the computer.
Look in front lower of engine behind radiator
The Oldsmobile Calais, also known as the Cutlass Calais, was produced by General Motors from 1985 to 1991. In 1987, the Quad 4 engine was developed and the 1988 Calais was fitted with it. All?æof the Quad 4 14 engine types of the 2.3 liter version are interchangeable on the 1988 Calais.
I would take it to a repair shop and have them check it out. If indeed the quad driver is defective you will have to replace the computor.
A DTC #26 is a Quad Driver Module Malfunction.
To set the timing on a 1990 Olds Calais with a 2.3L Quad 4 engine, first ensure the engine is at TDC (top dead center) for cylinder one on the compression stroke. Then, locate the timing mark on the crankshaft pulley and the timing tab on the engine. Use a timing light to check the timing; if adjustments are needed, loosen the distributor hold-down bolt and rotate the distributor until the timing light indicates the desired timing mark. Finally, retighten the distributor bolt and recheck the timing to ensure it remains in the correct position.
To change the water pump on a 1989 Oldsmobile Calais with a Quad 4 motor, first disconnect the negative battery terminal. Remove the serpentine belt by loosening the tensioner, then drain the coolant from the radiator. Unbolt the water pump from the engine block, clean the surface, and install the new pump with a new gasket. Reassemble everything in reverse order, refill the coolant, and reattach the battery terminal.
Quad drivers are small chips that perform on off functions inside the Engine Control Module. If you have a code which states there is a Quad Drivers Error, you need to check the items that that particular Quad Driver is controlling. For example, the a/c compressor relay, or trans solenoids etc...
P1655 refers to the Powertrain Control Module fault (quad driver 2)
You have to remove the intake manifold and be care full of the crank sensor
the quad driver module is a component of the ECM. you must replace ECM.
Replacing the starter on a 1991 Oldsmobile Calais with a Quad 4 engine can be moderately challenging, especially if you're not familiar with automotive repair. The starter is located in a tight space, which may require removing other components for better access. Basic tools and some mechanical knowledge are necessary, but it’s manageable for someone with DIY experience. Always ensure the battery is disconnected before starting the replacement to avoid any electrical hazards.