Hey,
New to this forum, Just having a trouble with my 91 2L Primera auto. When the car warms up (normally around 5 minutes) and im at the lights the car revs will fluctuate around 700, but I know that it used to be around 1000. You can also hear it stuttering. Now I have changed the spark plugs to these platnuim ones (which did solve the problem for a short time as it used to be alot worse and the car would jump and stutter at the lights), and have also put a new fuel filter in today. But it is still having this problem. Ive heard it could have something to do with Air Flow meter or crank angle sensor but I have no idea. Anywhere I should start? Also the fuel injectors have been upgraded and the leads to the spark plugs but im not to sure when it was done as I bought it like this.
Also just a scarey thing, one of the brackets holding up the engine has come off, so when you rev it the whole motor moves alot. But will have that fixed tommorrow I hope.

Thanks :)