Help with tdc P1138

[nislov]

Hello there, first time here I need help with the description of code P1138 in a 2004 sentra vin number is 3N1CB51D84 every thing looks good in it except for an erratic tach, but no driveabilty problems at all, any help will be greatly appreciated. CJ

[nislov]

Hello: someone just told me this code is related to the swirl control valve, can someone tell how this valve works? Thanks a lot

[nametakennow]

Are you sure it's 1138? I don't see that listed as a possible code.

[nislov]

Yes it is P1138 and someone from http://www.iatn.net told me is for swirl valve control circuit, my question is how do i go about checking this valve?

[nametakennow]

Odd.

Click the last link in my sig, right above the GT dealie, you'll find the FSM for your car. Download it and look up the instructions there.

[nislov]

Thanks again, well the fsm did not have procedures to test swirl valve, but is a very simple system,and by doing some visual inspection I found a bad actuator motor, this motor actuates the valve and is commanded by ECU, on oppsite side of motor is a valve angle sensor that tells ECU the amount of valve opening, this valve creates wind turbulence for a more complete air/fuel ignition, for power gain and emissions control. Thanks again