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Acceleration problem - Engine low power?

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Do you have a real scan tool that can monitor live voltages?

Roy

P0335
Descriptor
Probable Causes
Accelerator Pedal Position (APP) Sensor
Accelerator Pedal Position (APP) Sensor 2
Accelerator Pedal Position (APP) Sensor Circuit Shorted
Crankshaft Position (CKP) Sensor
Crankshaft Position (CKP) Sensor Circuit Open or Shorted
Evaporative Emission (EVAP) Control System Pressure Sensor
Refrigerant Pressure Sensor
Refrigerant Pressure Sensor Circuit Shorted
Signal Plate (Flywheel)
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Friday, August 28th, 2020 AT 9:34 AM (Merged)
Tiny
AYERS4
  • MEMBER
  • 1 POST
  • 2006 NISSAN SENTRA
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 42,000 MILES
I have a 2006 Nissan Sentra. I had an oil change and fuel injection cleaning done yesterday, and now my car won't rev above 2800 rpms in third gear. I can eventually get up to interstate speeds, but I have no power. If I try to set cruise control, the Set light on the dashboard blinks and nothing happens. I can push the accelerator to the floor and the engine will not rev. Can you tell me what has happened and suggest a fix?
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Friday, August 28th, 2020 AT 9:35 AM (Merged)
Tiny
BLOWNSCOOT
  • MEMBER
  • 3 POSTS
Check converter
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Friday, August 28th, 2020 AT 9:35 AM (Merged)
Tiny
CMONCADO
  • MEMBER
  • 1 POST
  • 2005 NISSAN SENTRA
  • 4 CYL
  • 2WD
  • AUTOMATIC
I have a 2005 Nissan Sentra 1.8L which seems to be giving me trouble in regards to idling with high RPMs and with ack of power when accelerating. When I turn on my car it will increase the rpm's to 3000 rpms, and then shoot down to about 1500 rpms in a matter of 15 seconds. I have tried to get some feedback in regards to this with no luck. In regards to acceleration, my car does not seem to wanna accelerate smoothly without shooting up the rpm's to 3500-4000 when they should be at 1500-2000 for the speed I was going. What could these problems indicate? Please help me!
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Friday, August 28th, 2020 AT 9:35 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,320 POSTS
Have the throttle position sensor checked. It sounds like it isn't properly shifting. Also, at the same time have the idle air control valve checked.
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+1
Friday, August 28th, 2020 AT 9:35 AM (Merged)
Tiny
CAIT FARAWAY
  • MEMBER
  • 1 POST
  • 2004 NISSAN SENTRA
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 157,000 MILES
While in the highway, my brake light and battery light came on together. After pulling over, I determined that my brake fluid was between the two lines. I did not have the ability to test the battery voltage; the battery was replaced two years ago. About 25 miles later, the car began having difficulty accelerating. The engine starts and there are no problems idling. I’m wondering what is the most likely source of the problem?
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Friday, August 28th, 2020 AT 9:35 AM (Merged)
Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello,

This sounds like you could have a problem with your vehicle's throttle body. Over time and through normal wear and tear your vehicle's throttle and throttle body get black gunk on it that throws your vehicle's Throttle Position Sensor out of wack and your vehicle's Power-train Control Module gets a mixed signal, sending it into "limp mode" with reduced power. This is done so you can drive it to a repair shop and get it fixed. Here is a link below for you to go to:

https://www.2carpros.com/articles/how-a-throttle-body-works
https://www.2carpros.com/articles/throttle-actuator-service

Please go through these guides and get back to us with what you are able to find out.

Thanks,
Alex
2CarPros
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Friday, August 28th, 2020 AT 9:35 AM (Merged)
Tiny
INDIANBLADE13
  • MEMBER
  • 1 POST
  • 2004 NISSAN SENTRA
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 68,000 MILES
Started of with bucking while starting off. I changed the oil and air filter. Also got code to change camshaft position sensor, did that, now it sounds like my air intake is super loud, and I have no power, when going from 0- 15 takes about the sametime it would a riding lawn mower to do so. The bucking stoped but its super sluggish and even with foot to floor, it just barely moves, doesnt feel like tranny problem because its still responsive just really slow
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Friday, August 28th, 2020 AT 9:36 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,320 POSTS
Thanks for the analogy of the lawn tractor, I needed a good laugh.

As far as the power, has the check engine light come back on? Have you checked the catylatic converter to see if it is plugged? Have you checked fuel pump pressure?

Let me know.

Joe
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Friday, August 28th, 2020 AT 9:36 AM (Merged)

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