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No acceleration

Tiny
TRIPZKLR88
  • MEMBER
  • 2005 SATURN VUE
  • 2.2L
  • 4 CYL
  • 2WD
  • MANUAL
  • 169,000 MILES
I have very little acceleration all of the time it has the engine light on and the limp mode light on. I have replaced the throttle body sensor, the MAF, the gas pedal sensor, the PCM, crank shaft sensor, and put new plugs in. It has an eco tech. What is wrong? Is there any common issues I’m missing here? Had it read by a Mactools computer but it pulled no codes. Idles high on start shoots to 2,500 rpm's then down to 1,000 rpm's once warm and been idled settles at 1,200-1,500 rpm's.
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Thursday, November 21st, 2019 AT 3:36 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,872 POSTS
Hi,

Have you checked to make sure there isn't a restriction in the exhaust system? For example, a partially plugged catalytic converter? Also, if your scanner is a live data scanner, can you provide the fuel trim information? If so, let me know what the Short Term Fuel Trims are when it is at idle.

Take a look through these two links. They discuss catalytic converter symptoms and how to check one.

https://www.2carpros.com/articles/bad-catalytic-converter-symptoms

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

Let me know.

Joe
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Thursday, November 21st, 2019 AT 6:24 PM

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