Will not idle without hitting the gas

Tiny
JLAPAVEY
  • MEMBER
  • 2014 CHEVROLET EQUINOX
  • 2.4L
  • 4 CYL
  • 4WD
  • AUTOMATIC
  • 86,990 MILES
A few weeks ago my girlfriend's vehicle fuel line froze. After this happened I added fuel and a antifreeze and water remover to the tank. I replaced the battery and started the vehicle. It won't idle without keeping gas on it. It drives but make a noise I have never heard before. The power reduction light came on soon after. I idled it at 2,000 rpm's for a few minutes with no change. It clearly has a fuel air problem and in thinking throttle body? I am going to do a video tomorrow and check the throttle body. Any other recommendations would be helpful.
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Friday, February 21st, 2020 AT 5:57 PM

5 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

If the fuel line froze, there may have been damage to the pressure regulator or injectors. Since the reduced power light is on, the first thing I would recommend is having the computer scanned for trouble codes. Here is a quick video showing how it is done:

https://youtu.be/YV3TRZwer8k

I realize most people don't own a scanner, but often times a parts store will do it free of charge (if it can be driven) or lend/rent a scanner to you. By doing this, it will point us in the right directions of the problem.

I will watch for your video. Also, if it is possible, try to record the sound you mentioned so I can hear that as well.

Take care,
Joe
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Friday, February 21st, 2020 AT 6:58 PM
Tiny
KASEKENNY
  • EXPERT
Sounds like you have one of two issues. If this happened close after putting the additives in the fuel, that you still have a fuel issue. What products did you use? Maybe a picture of the bottles will make it easier. If the water was bad enough to freeze the fuel line then the other components in the fuel system like injectors and possible pump was effected as well.

The other possible cause is the idle control which would be the throttle body that you mentioned.

However, you didn't mention issues with this prior so I would chase down the fuel issue first.

Did you get codes out of it? If you can't pull them most parts stores can do it free of charge. Let's get those and go from there. Thanks
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Friday, February 21st, 2020 AT 7:22 PM
Tiny
JLAPAVEY
  • MEMBER
I did pull 4 codes.
P0016
P0089
P228D
P0106
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Monday, February 24th, 2020 AT 5:44 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

I suspect the fuel pressure is too high. It was most likely damaged. This requires you to perform a fuel pressure test. I need to know what the pressure is. if you look below, the last thing I added were the diagnostics based on fuel pressure. Perform this test and let me know the results. Note that because of the design on this vehicle, there isn't a traditional type fuel pressure regulator.

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

________________________________________________________________

DTC P228D
- Fuel Pressure Regulator Control Performance - High Pressure

DTC P0089
- Fuel Pressure Regulator Performance

The P0016 is a cam sensor issue. However, we need to first focus on the fuel pressure.

As far as the cam sensor issue, were you working on the engine and possibly disconnected something?

_____________________________________________________________

If less than 345 kPa (50 psi)
Refer to Circuit/System Testing - Fuel Pressure Low.

If greater than 650 kPa (94 psi)
Replace the G12 Fuel Pump.

If between 345-650 kPa (50-94 psi)

4. Verify that the fuel pressure decreases to less than 600 kPa (87 psi) after the fuel pump is turned off.

If greater than 600 kPa (87 psi)
Replace the G12 Fuel Pump.

If less than 600 kPa (87 psi)

5. Verify that the fuel pressure does not decrease more than 34 kPa (5 psi) in 1 minute.

If greater than 34 kPa (5 psi)
Refer to Circuit/System Testing - Fuel Pressure Leaks Down.

If less than 34 kPa (5 psi)

6. Relieve the fuel pressure to 69 kPa (10 psi).

7. Verify that the fuel pressure does not decrease more than 14 kPa (2 psi) in 5 min.

If greater than 14 kPa (2 psi)
Replace the G12 Fuel Pump.

If less than 14 kPa (2 psi)

8. Engine idling.

9. Verify the scan tool Fuel Pressure Sensor parameter is between 300-400 kPa (43-58 psi).

If less than 300 kPa (43 psi)
Refer to Circuit/System Testing - Fuel Pressure Low.

If greater than 400 kPa (58 psi)
Replace the G12 Fuel Pump.

If between 300-400 kPa (43-58 psi)

10. Verify the scan tool Short Term Fuel Pump Trim and the Long Term Fuel Pump Trim when multiplied together are less than 1.5.

If greater than 1.5
Refer to Circuit/System Testing - Fuel Pressure Low.

If less than 1.5

11. Verify the scan tool Fuel Pressure Sensor and the Desired Fuel Pressure are within 45 kPa (6.5 psi) at 300 kPa (43.5 psi) request or 60 kPa (8.7 psi) at 400 kPa (58 psi) request of each other while operating the vehicle through varying loads.

If greater than 45 kPa (6.5 psi)/60 kPa (8.7 psi)
Refer to Circuit/System Testing - Fuel Pressure Drops Off.

If less than 45 kPa (6.5 psi)/60 kPa (8.7 psi)

12. If the fuel system components test normal, refer to Symptoms - Engine Controls See: Computers and Control Systems > Symptom Related Diagnostic Procedures > Symptoms - Engine Controls, Fuel Injector Solenoid Coil Test See: Fuel Injector > Component Tests and General Diagnostics > Fuel Injector Solenoid Coil Test, and Fuel Injector Balance Test See: Computers and Control Systems > Component Tests and General Diagnostics > Fuel Injector Balance Test.

Circuit/System Testing

Fuel Pressure Low

1. Verify none of the conditions listed below exist:

* Restricted fuel feed pipe

* Inspect the harness connectors and the ground circuits of the fuel pump for poor connections.

If a condition exists
Repair as necessary.

If no conditions exist
Replace the G12 Fuel Pump.

_____________________________________

Note that based on the codes you provided, low pressure shouldn't be the issue. Perform the test and let me know what you find. I have a feeling you will may need to replace the pump.

Take care,
Joe
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Monday, February 24th, 2020 AT 8:29 PM
Tiny
JLAPAVEY
  • MEMBER
There are 4 codes pending:
P0016
P0089
P228D
P0106
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Wednesday, February 26th, 2020 AT 10:01 AM

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