Poor acceleration?

Tiny
RONALD DEVOLD
  • MEMBER
  • 2013 GMC SIERRA
  • 6.0L
  • V8
  • 4WD
  • AUTOMATIC
  • 110,830 MILES
I have the truck listed above 2500HD and while pressing on the accelerator it seems to have a delay and takes a while to accelerate normally. I have to push it to the floor to take off normally. I may be wrong, but I think the truck was tuned taking I bought the vehicle used. I don't know.
Monday, May 1st, 2023 AT 2:25 PM

18 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,959 POSTS
This sounds like you have a weak fuel pump or a clogged exhaust system. Let's start by running the codes to see what comes up,

This guide can help you:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Also, it could be the MAF sensor needs to be replaced.

Here is a guide below that can help as well:

https://www.2carpros.com/articles/engine-has-low-power-output

Here is how to change the MAF sensor out in case you need it. Check out the images (below). Please let us know what happens.

Was this
answer
helpful?
Yes
No
Tuesday, May 2nd, 2023 AT 9:03 AM
Tiny
RONALD DEVOLD
  • MEMBER
  • 93 POSTS
I have the following codes:
P0332-Knock Sensor 2 Low Voltage
P0113-Intake Air Temperature (Iat) Sensor Circuit High Voltage
P2228-Barometric Pressure (Baro) Sensor Circuit Low Voltage
Was this
answer
helpful?
Yes
No
Wednesday, May 3rd, 2023 AT 3:58 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,959 POSTS
Here is what is said about these codes:

P0332 - Knock Sensor 2 Low Voltage: This code indicates that there is a problem with the second knock sensor in the engine. The knock sensor detects vibrations in the engine caused by detonation or knocking and sends a signal to the engine control module (ECM). A low voltage reading from the knock sensor could indicate a problem with the sensor itself or with the wiring or connector that leads to it. This could cause the ECM to retard ignition timing and result in reduced engine performance.

P0113 - Intake Air Temperature (IAT) Sensor Circuit High Voltage: This code indicates that the ECM has detected a high voltage reading from the intake air temperature sensor. The IAT sensor measures the temperature of the air entering the engine and sends this information to the ECM, which uses it to calculate the correct air/fuel mixture for optimal performance. A high voltage reading from the IAT sensor could indicate a problem with the sensor itself or with the wiring or connector that leads to it. This could cause the engine to run rich and result in reduced fuel economy.

P2228 - Barometric Pressure (BARO) Sensor Circuit Low Voltage: This code indicates that the ECM has detected a low voltage reading from the barometric pressure sensor. The BARO sensor measures the atmospheric pressure and sends this information to the ECM, which uses it to adjust the fuel injection timing and other engine parameters for optimal performance. A low voltage reading from the BARO sensor could indicate a problem with the sensor itself or with the wiring or connector that leads to it. This could cause the engine to run poorly and result in reduced performance and fuel economy.

So, we need to check the catalytic converter because if it is partially clogged it can cause these codes.

This guide can help:

https://www.2carpros.com/articles/how-to-test-a-catalytic-converter

and

https://youtu.be/CORe9JyrexI

Check out the images (below). Please let us know what happens.

Was this
answer
helpful?
Yes
No
Thursday, May 4th, 2023 AT 11:22 AM
Tiny
RONALD DEVOLD
  • MEMBER
  • 93 POSTS
I got the engine to normal temperature. Turned off truck and took the following readings. I have attached a photo.
Was this
answer
helpful?
Yes
No
Saturday, June 17th, 2023 AT 5:43 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,959 POSTS
The truck needs to be running when taking the readings but from what I can see the cats might be clogged up. Please resend the readings.
Was this
answer
helpful?
Yes
No
Monday, June 19th, 2023 AT 9:49 AM
Tiny
RONALD DEVOLD
  • MEMBER
  • 93 POSTS
I retook the temperature reading while the engine was hot at normal temperature.
Was this
answer
helpful?
Yes
No
Tuesday, June 20th, 2023 AT 7:17 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,959 POSTS
The first cat looks okay, but the rear cat looks like it might be clogged. Also, I noticed a big difference in the input temperature on the driver's side, is the engine running smoothly?
Was this
answer
helpful?
Yes
No
Wednesday, June 21st, 2023 AT 10:09 AM
Tiny
RONALD DEVOLD
  • MEMBER
  • 93 POSTS
I'm still have a delay or drag when accelerating. I'm working with another member on a knock sensor code. And I forgot to mention that I cleaned the MAF Sensor, and that code went away. I only just have the P0332 code.
Was this
answer
helpful?
Yes
No
Wednesday, June 21st, 2023 AT 3:41 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,959 POSTS
The P0332 code is a generic OBD-II diagnostic trouble code that indicates a problem with the knock sensor circuit on a vehicle. The knock sensor is responsible for detecting abnormal engine vibrations or "knocking" that can occur if the air/fuel mixture is detonating prematurely in the combustion chamber. The knock sensor sends signals to the engine control module (ECM) to adjust the ignition timing and prevent engine damage.

When the ECM detects a voltage or signal deviation from the knock sensor circuit that is outside the expected range, it triggers the P0332 code and illuminates the Check Engine Light (CEL) on the vehicle's dashboard. This code is specific to cylinder 2 in a multi-cylinder engine.

Some common causes of the P0332 code include:

Faulty knock sensor: The sensor itself may be damaged or have a poor connection.
Wiring issues: Damaged wiring, loose connections, or corrosion in the knock sensor circuit can cause this code.
Engine mechanical problems: Issues like a worn-out engine, excessive carbon buildup, or incorrect spark plugs can lead to abnormal engine vibrations and trigger the code.
Faulty ECM: In rare cases, a malfunctioning ECM may mistakenly trigger the P0332 code.

I would do a fuel pressure test because lack of fuel can make it ping and cause the code. You can rent a fuel pressure gauge at the local auto parts store for cheap or free here is a guide to help.

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

The fuel pressure should be about 60 PSI

Check out the images (below). Please let us know what happens.
Was this
answer
helpful?
Yes
No
Friday, June 23rd, 2023 AT 10:04 AM
Tiny
RONALD DEVOLD
  • MEMBER
  • 93 POSTS
I have 52 PSI of fuel pressure.
Was this
answer
helpful?
Yes
No
Saturday, June 24th, 2023 AT 5:00 AM
Tiny
RONALD DEVOLD
  • MEMBER
  • 93 POSTS
I connected the gauge and turned the ignition on. The pressure gradually went to 54 PSI and slowly dropped to 52 PSI. Started the engine and the pressure jumped to 60psi. I applied the emergency brake and put the truck in reverse and idled the engine and the pressure held at 60 PSI.
Was this
answer
helpful?
Yes
No
Saturday, June 24th, 2023 AT 5:58 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,959 POSTS
That is a good sign, I think the pump is okay, did you try a new MAF sensor they can cause low power and not give a code.
Was this
answer
helpful?
Yes
No
Saturday, June 24th, 2023 AT 11:20 AM
Tiny
RONALD DEVOLD
  • MEMBER
  • 93 POSTS
I will install one and get back.
Was this
answer
helpful?
Yes
No
Saturday, June 24th, 2023 AT 1:06 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,959 POSTS
Sounds good, have a nice weekend.
Was this
answer
helpful?
Yes
No
Sunday, June 25th, 2023 AT 11:29 AM
Tiny
RONALD DEVOLD
  • MEMBER
  • 93 POSTS
I installed a new MAF Sensor and the code came back.
Was this
answer
helpful?
Yes
No
Tuesday, June 27th, 2023 AT 9:51 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,959 POSTS
What code comes back? If you are getting the BARO sensor code you could have clogged cats, you might want to undo the head pipes and drive it to see if the power returns, if so, I would replace the head pipe and catalytic converters.

Here is a video to show you how:

https://youtu.be/CORe9JyrexI

Please let us know how it goes.
Was this
answer
helpful?
Yes
No
Wednesday, June 28th, 2023 AT 10:14 AM
Tiny
RONALD DEVOLD
  • MEMBER
  • 93 POSTS
The P0332 knock sensor code.
Was this
answer
helpful?
Yes
No
Wednesday, June 28th, 2023 AT 5:47 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,959 POSTS
Can you upload a short video of the engine running so I can see what's going on? Can you hear the engine making noise while running? I have seen the knock sensor wire lead go bad and cause the knock sensor code.
Was this
answer
helpful?
Yes
No
Thursday, June 29th, 2023 AT 10:31 AM

Please login or register to post a reply.

Sponsored links