Part or Full Throttle Hesitation

05lanceralliart · Mar 26, 2009, 06:27 AM

Under part or full throttle settings I am getting major hesitation. This happens throught out all gears. Nothing when the car is not in gear tho. Example: Feels like when your teaching someone to drive stick and its jerky during the starts and gear changes. I have Air/fuel gauge installed and during full throttle it give a full lean reading. ( Just a flashy light gauge not a wide band) I was thinking O2 sencer. Does anyone have any helpful tips or answers?

05 Ralliart with RRM SRI and Underdrive Pully.

Ralliart_on_LSD · Mar 26, 2009, 08:51 AM

does the motor cough and backfire when it hesitates? or does it climb revs but dont accelerate? what does it do/sound like?

hackish · Mar 27, 2009, 07:14 AM

Sounds like your O2. If you absolutely floor it during this hesitation does the power come back?

05lanceralliart · Mar 28, 2009, 11:10 AM

No cough or backfire during the hesitation. And the power does not come back. When you hit the mivec point there feels like not increase in power.

**otter** · Mar 28, 2009, 08:41 PM

99% sure it's your accel pedal position sensor. You're getting the lean reading because the sensor is erroniously letting off the throttle.

05lanceralliart · Apr 2, 2009, 08:01 PM

I found the answer on the 30th. I feel like a retard now lol. My intake pipe was loose just after the MAP sencer. So when I hit the throttle the pipe would jump off and bypass the sencer thus no reading.