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1997 XE 2.4 with M/T...
My truck has slowly developed a problem at idle, but only when the A/C is off. I noticed it most last night... with the truck is stopped and at idle the tach. was bouncing from somewhere around 400 to 700 RPM. If I turn the A/C on, the idle is smooth and at about 1000 RPM. The idle bounces about twice per second - as though the truck is choking down and then the ECU is trying to fix it through the IAC/AAC valve. My guess is that the idle setting when the compressor is on is covering up whatever other problem is there.
I recently replaced the spark plugs with OEM plugs, and installed a new OEM fuel filter. I also checked it with a Consult adaptor and my laptop using Nissan ScanTech software. The power balance looked good, so I don't think it's injector related. Also no stored codes...
Any suggestions?
Thanks!
Heath
My truck has slowly developed a problem at idle, but only when the A/C is off. I noticed it most last night... with the truck is stopped and at idle the tach. was bouncing from somewhere around 400 to 700 RPM. If I turn the A/C on, the idle is smooth and at about 1000 RPM. The idle bounces about twice per second - as though the truck is choking down and then the ECU is trying to fix it through the IAC/AAC valve. My guess is that the idle setting when the compressor is on is covering up whatever other problem is there.
I recently replaced the spark plugs with OEM plugs, and installed a new OEM fuel filter. I also checked it with a Consult adaptor and my laptop using Nissan ScanTech software. The power balance looked good, so I don't think it's injector related. Also no stored codes...
Any suggestions?
Thanks!
Heath