My service engine light comes on and then the temp and surrounding lights flash?

TONYAMAYPP

MEMBER
1989 OLDSMOBILE DELTA 88
6 CYL
FWD
AUTOMATIC

I have a 1989 Oldsmobile Delta 88, when I drive it for a few minutes, about 10-15 minutes, depending on the heat, my service engine light comes on and then the temp and surrounding lights flash, then the car stalls or tries to stall. I had to replace the radiator a few weeks ago. I noticed the fan to the radiator doesn't come on unless I use the air conditioner, that is the only way I can keep the car running. I really enjoy this car and prefer to work on it myself. Where should I start first?

3 Replies

JDL

MECHANIC
16,098 POSTS

Based on the symptoms you described with your 1989 Oldsmobile Delta 88, there could be a few possible causes for the engine stalling and the warning lights coming on. Here are a couple of areas to investigate:

Cooling System: Start by checking the cooling system since you mentioned recently replacing the radiator. Make sure the coolant level is at the proper level and there are no leaks. Verify that the thermostat is functioning correctly and allowing coolant to flow properly through the engine. Also, check the operation of the cooling fan. It should come on when the engine reaches a certain temperature, regardless of whether the air conditioner is on or not. If the cooling fan is not functioning, it could lead to overheating and engine stalling.

Charging System: Another potential issue could be related to the charging system. A malfunctioning alternator or voltage regulator can cause the battery voltage to drop, resulting in electrical system issues and engine stalling. Check the alternator output and ensure it is charging the battery properly. Also, inspect the battery connections for any loose or corroded terminals.

Ignition System: The ignition system components, such as the spark plugs, ignition coils, and ignition control module, could be contributing to the stalling issue. Inspect and replace any worn-out or faulty components. Additionally, check the condition of the spark plug wires and ensure they are properly connected.

Fuel System: A fuel-related issue, such as a clogged fuel filter or a failing fuel pump, can cause intermittent stalling. Inspect the fuel system components, including the fuel filter, fuel lines, and fuel pump. It may be necessary to replace the fuel filter and test the fuel pump's pressure to ensure it is within the manufacturer's specifications.

Since the service engine light is coming on, it is recommended to retrieve the diagnostic trouble codes (DTCs) using an OBD-II scanner. This will provide more specific information about the issue and help narrow down the troubleshooting process.

If you prefer to work on the car yourself, you can start with the basic checks mentioned above and proceed based on the results. However, if you encounter difficulties or are unsure about performing certain tasks, it's advisable to seek the assistance of a qualified mechanic or automotive technician. They have the expertise and specialized tools to diagnose and repair the issue accurately.