Will not start

Tiny
JIMMY62DEAN
  • MEMBER
  • 2002 OLDSMOBILE ALERO
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 80,000 MILES
Need to use staring fluid to start car when it has not been running for a few hours or over night.
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Friday, October 5th, 2018 AT 4:03 PM

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Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi and thanks for using 2CarPros.com.

It sounds like a fuel pressure issue. Take a look through this link. It describes how to check pressure.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

The manufacturer's specs for pressure is:

Key On Engine Off (KOEO) 50-60 psi

____________________________________________

Do this check when the engine would normally not start. If the pressure is good, the next question is the electronic coolant temperature sensor (ECT). The ECT tells the computer the coolant's temp. With that information, the computer determines how rich or lean to make the fuel / air mixture. If it thinks it much warmer than it actually is, it will cause the mixture to be lean. This could result in a no start. With a live data scanner, you can actually see what temperature is telling the computer. It should be within a few degrees of the ambient temp outside when the engine has not been run. Again, do this in the morning when the car normally doesn't start.

If you find the sensor is bad, here are the directions for replacement. The attached picture shows its location.

______________________________________

PROCEDURES
ENGINE COOLANT TEMPERATURE (ECT) SENSOR REPLACEMENT

REMOVAL PROCEDURE

NOTE: Use care when handling the coolant sensor. Damage to the coolant sensor will affect the operation of the fuel control system.
1. Turn OFF the ignition.
2. Drain the coolant system to below the engine coolant temperature (ECT) sensor. Refer to Draining and Filling Cooling System (3.4L) or Draining and Filling Cooling System (2.2L (L61)) in Cooling System.
3. Disconnect the engine coolant temperature (ECT) sensor electrical connector.
4. Carefully remove the ECT sensor.

INSTALLATION PROCEDURE

NOTE:
Refer to Component Fastener Tightening Notice in Service Precautions.
Use care when handling the coolant sensor. Damage to the coolant sensor will affect the operation of the fuel control system.
1. If you are reinstalling the original sensor, or if you are installing a new sensor without a sealer, coat the threads with sealer P/N 9985253 or an equivalent.

NOTE: Refer to Fastener Notice in Service Precautions.

2. Install the ECT sensor.

Tighten
Tighten the ECT sensor to 10 N.m (89 lb in).

3. Connect the ECT sensor electrical connector.
4. Refill the engine coolant system. Refer to Draining and Filling Cooling System (3.4L) or Draining and Filling Cooling System (2.2L (L61)) in Cooling System.

_______________________________________________________

Please note that the aforementioned problems are common. However, there still could be other things causing it. If the engine hasn't been tuned up for a long time, a tune up may be needed.

Let me know if this helps of if you have other questions.

Take care,
Joe
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Friday, October 5th, 2018 AT 9:03 PM

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