Quote:
Don't know if this has been said yet, but you are describing transmission slipping issues to me.
Have you had your tranny serviced lately?
Goodluck,
No i Havent. What would that consist of?Originally Posted by Dockof-bay
Hi,Don't know if this has been said yet, but you are describing transmission slipping issues to me.
Have you had your tranny serviced lately?
Goodluck,
StanVanDam
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Low idle, jumpy highway performance, and lack of power when pedal is fully depressed is exactly what would happen when the throttle position sensor is not calibrated correctly.
Did anyone ever clean the throttle body, and if so, did they do it by hand and push the flap open, or did they have someone turn the ignition to ON and step on the accelerator to open the throttle plate? Pushing it by hand is not recommended because it can throw off the calibration of the throttle position sensor.
Check your throttle position sensor - you'll need a handheld tester or Techstream. Turn the ignition to ON, and do not touch the accelerator pedal. The throttle valve opening percentage (THROTTLE POS) in the live data screen should read between 14.4 and 16%. I suspect yours will read below 14.4. If so, follow the instructions at www.lexls.com/tutorials/EFI/tps.html to recalibrate.
While you're at it, check your accelerator pedal position sensor - should read 0.6 - 1.0 V. Also, if you have a multimeter, check the throttle body assembly - resistance across terminals 1 and 2 should be 0.3-100 Ohms at 20C, resistance across terminals 3 and 5 should be 1.2 - 3.2 kOhms. If those items read outside of spec, replace the part.
If TPS is good, I'd check all vacuum hoses (including the vacuum switching valve on the side of the airbox) for leaks and loose connections.
Did anyone ever clean the throttle body, and if so, did they do it by hand and push the flap open, or did they have someone turn the ignition to ON and step on the accelerator to open the throttle plate? Pushing it by hand is not recommended because it can throw off the calibration of the throttle position sensor.
Check your throttle position sensor - you'll need a handheld tester or Techstream. Turn the ignition to ON, and do not touch the accelerator pedal. The throttle valve opening percentage (THROTTLE POS) in the live data screen should read between 14.4 and 16%. I suspect yours will read below 14.4. If so, follow the instructions at www.lexls.com/tutorials/EFI/tps.html to recalibrate.
While you're at it, check your accelerator pedal position sensor - should read 0.6 - 1.0 V. Also, if you have a multimeter, check the throttle body assembly - resistance across terminals 1 and 2 should be 0.3-100 Ohms at 20C, resistance across terminals 3 and 5 should be 1.2 - 3.2 kOhms. If those items read outside of spec, replace the part.
If TPS is good, I'd check all vacuum hoses (including the vacuum switching valve on the side of the airbox) for leaks and loose connections.
Quote:
Did anyone ever clean the throttle body, and if so, did they do it by hand and push the flap open, or did they have someone turn the ignition to ON and step on the accelerator to open the throttle plate? Pushing it by hand is not recommended because it can throw off the calibration of the throttle position sensor.
Check your throttle position sensor - you'll need a handheld tester or Techstream. Turn the ignition to ON, and do not touch the accelerator pedal. The throttle valve opening percentage (THROTTLE POS) in the live data screen should read between 14.4 and 16%. I suspect yours will read below 14.4. If so, follow the instructions at www.lexls.com/tutorials/EFI/tps.html to recalibrate.
While you're at it, check your accelerator pedal position sensor - should read 0.6 - 1.0 V. Also, if you have a multimeter, check the throttle body assembly - resistance across terminals 1 and 2 should be 0.3-100 Ohms at 20C, resistance across terminals 3 and 5 should be 1.2 - 3.2 kOhms. If those items read outside of spec, replace the part.
If TPS is good, I'd check all vacuum hoses (including the vacuum switching valve on the side of the airbox) for leaks and loose connections.
Thanks for the reply. Really appreciate the insight. Dont have a techstream but might just take it down to the mechanic and ask em to do it..Originally Posted by StanVanDam
Low idle, jumpy highway performance, and lack of power when pedal is fully depressed is exactly what would happen when the throttle position sensor is not calibrated correctly.Did anyone ever clean the throttle body, and if so, did they do it by hand and push the flap open, or did they have someone turn the ignition to ON and step on the accelerator to open the throttle plate? Pushing it by hand is not recommended because it can throw off the calibration of the throttle position sensor.
Check your throttle position sensor - you'll need a handheld tester or Techstream. Turn the ignition to ON, and do not touch the accelerator pedal. The throttle valve opening percentage (THROTTLE POS) in the live data screen should read between 14.4 and 16%. I suspect yours will read below 14.4. If so, follow the instructions at www.lexls.com/tutorials/EFI/tps.html to recalibrate.
While you're at it, check your accelerator pedal position sensor - should read 0.6 - 1.0 V. Also, if you have a multimeter, check the throttle body assembly - resistance across terminals 1 and 2 should be 0.3-100 Ohms at 20C, resistance across terminals 3 and 5 should be 1.2 - 3.2 kOhms. If those items read outside of spec, replace the part.
If TPS is good, I'd check all vacuum hoses (including the vacuum switching valve on the side of the airbox) for leaks and loose connections.
