Vehicle does not accelerate when depressed throttle pedal

MALLYBOY

MEMBER
2005 MAZDA TRIBUTE
3.0L
V6
2WD
AUTOMATIC
56,478 MILES

This vehicle does not raise or hesitate before it raise, I have diagnosed it after certain distance drive but it is not record any fault code. I have used live data to view of a particular sensor is out operating threshold but could not see except Absolute Throttle Position that reads:20%, (I attached the picture below). At this point I am confused what could be problem, any suggestions would be appreciated.

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6 Replies

JACOBANDNICKOLAS

MECHANIC
108,269 POSTS

Hi,

I have a couple of questions. First, I noticed no voltage signal on two of the oxygen sensors and very little response on the others. Was this test done when the engine was at operating temperature?

Next, absolute throttle position, is that a reference to the manifold absolute pressure sensor or the throttle position sensor?

Is it possible for you to provide the short-term fuel trims for me?

Let me know.

Joe

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Thursday, September 23rd, 2021 AT 5:39 PM

MALLYBOY

MEMBER
300 POSTS

Was this test done when the engine was at operating temp? Yes the engine has reached operating temperature.

Next, absolute throttle position, is that a reference to the manifold absolute pressure sensor or the throttle position sensor? It's for reference to throttle position sensor.

Is it possible for you to provide the short-term fuel trims for me? Yes I will provide the live data stream of all sensor pids.
Thanks

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Thursday, September 23rd, 2021 AT 10:19 PM

MALLYBOY

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300 POSTS

Hello! Good evening, Is it possible for you to provide the short-term fuel trims for me? Yeah I have provide it, look at the picture below.

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Friday, September 24th, 2021 AT 1:13 PM

JACOBANDNICKOLAS

MECHANIC
108,269 POSTS

The short-term fuel trims are good. You want them to be between positive 10% and negative 10%.

If you are seeing 20% for the TPS at idle, something is wrong. At an idle, it should be around 0% to 2 or 3%.

Have you removed the connector at the TPS to inspect for damage or corrosion?

Let me know.

Joe

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Friday, September 24th, 2021 AT 6:41 PM

MALLYBOY

MEMBER
300 POSTS

Have you removed the connector at the TPS to inspect for damage or corrosion? No I have not done that. I will do it and get back to you.

Another thing is when I depress the throttle pedal, I hear a hissing sound within the rear side of intake manifold, when this happens, it fails to accelerate, can I use MAP sensor reading to identify if there's an unmetered air from external source entering the engine?