My car has been acting weird for the last couple of weeks. The idle is a touch rougher than it should be, but the biggest problem is when the car is under load from 1k RPM to 2.5k or so. It feels almost like a bad plug as it hesitates and sputters pretty badly. Once I reach 3k or so it smooths out and feels normal, but there's been some power loss (which may be partially attributed to the fact that we've had 100 degree temps lately). I thought it was a spark issue, but I replaced the plugs/wires (needed it anyway) and the problem is still there. I went through and unplugged the wires one by one from the CPs while the car was idling, but the results showed that all cylinders are firing (the car got a bit rougher when each wire was pulled). I pulled the MAF and cleaned it (the car has a K&N and there was a touch of crud on it), but the problem is still there. I noticed that the idle stays the same when I unplug the MAF, which has me thinking it may have possibly gone bad. My CEL came on a few months ago, but the car ran fine throughout (got a code stating that the car was running a touch lean in bank 1, but I haven't had a chance to investigate further). When you stand behind the car you can definitely tell there's a difference in the way the exhaust sounds. The lobes are more pronounced than usual.
Besides the MAF or the sparkplugs/wires, what would cause these symptoms? The car doesn't have any knocks or pings (thankfully) but the stuttering has got to go.
Besides the MAF or the sparkplugs/wires, what would cause these symptoms? The car doesn't have any knocks or pings (thankfully) but the stuttering has got to go.
