The fuel pump should run for a few seconds when you turn the key to the "ON" position, and then turn off. If it continues to run after the engine has started, it could be a sign of a problem with the fuel pump relay or the fuel pressure regulator.
1991 Festiva Will Start And Idle With Intermittent Miss But Not Accelerate
If your 1991 Festiva will start and idle, but not accelerate, it could be a problem with the fuel system, the ignition system, or the air intake system.
Here are a few things to check:
* Check the fuel pressure. The fuel pressure should be between 35 and 45 PSI at idle. If it is too low, it could be a sign of a problem with the fuel pump, fuel filter, or fuel pressure regulator.
* Check the spark plugs and wires. The spark plugs and wires should be in good condition and properly gapped. If they are old or damaged, they could cause the engine to miss or run rough.
* Check the air filter. The air filter should be clean and free of debris. If it is clogged, it could restrict airflow to the engine and cause it to run rich.
* Check for vacuum leaks. A vacuum leak can cause the engine to run lean and miss. Check all of the hoses and connections in the vacuum system for leaks.
If you are still having problems, you may need to take your 1991 Festiva to a qualified mechanic for diagnosis and repair.
