fred97gle

When the car is cold started, like in the morning, it fires off right away but right after the initial start the RPM's fall off to about 500 for a second then jump right back to around 1100 to 1200 and then everything stays normal.
I recently re-oiled my filter and thought I might have over saturated it so I re-cleaned it and re-oiled it again making sure not to overdo it. Put it back on and still have the same problem. Any idea's?

Guest

Does your oil light flash too? Any noises associated with the rpm dive? Also, check your throttle body for carbon deposits and perhaps oil from the K&N.

fred97gle

just sounds like its slowing down. No other lights or nothing. I'll check for filter oil in the throttle body tonight. Other than this the car runs great. Still as strong as before in all other aspects.

NissanFreak

mine does the same thing. every morning when it's cold. just sorta dips in rpm's for a second, then normal. try turning the ignition to "on", but don't turn over the motor. leave it like that for about 10 seconds, then start the car. should be better.

ZuMBLe

iTrader: (1)

I keep telling you people. Alternator. Seems to be a problem on the 97s. Check it. Mine did the same thing, then caught fire. Had it replaced at the dealer and I have no such problems anymore. My car is parked outside in 20 degree weather and the car roars to a start now and stays above 1000rpm during warm up. No dips. Do you have a funny whine too? Listen to another maxima. Maybe a 95 or something. And see if your engine sound different. Mine had a supercharger type whine when things started going south.

ZuM

NissanFreak

****, mine has that exact same "supercharger whine", i thought that was normal?? Is the alternator a part of the drivetrain warranty that i should have left?

dch95

As a mechanic I cannot understand how an Alternator would affect rpm,s in any way. Of course I,m always learning something new everyday and maybe you or somebody else can explain how an alternator would do this.

fred97gle

the motor has always been quiet. Sounds the same as before.

MacGyver

My 97 SE makes a wierd sound when it starts up too. Aside from that grinding noise on cold days, when the engine is running, it sounds like a faint clicking noise.

fred97gle

got home tonight and opened the hood to check things out. I moved the throttle valve by hand and noticed it was sticking when going from closed to barely open. Took everything off up to the TB and sure enough, it was gunked up. Cleaned it real good. Seemed like carbon and some of the K&N oil. It didn't coat everything but was right around the edge of the butterfly plate. Put it back together and it fired right up and held at a steady rpm. Thanks for the input guys.

ZuMBLe

iTrader: (1)

Well, the alernator is spun by the engine.. If there is something wrong with the alernator.. Like maybe it doesn't want to spin.. It will bog the engine.

ZuM