here we are with my first question.
when I start my '90 RS in "P" the RPM goes stright up to 3.5 / 4 k
but when I put in D the rpms goes down to 2k (more or less)
is that thing normal? (consider that we have now 30°C air temp)
maybe is some sensor to be cleaned? air box/MAF/IAC?
I suppose she should run idle 2.5k and less than 2k when in gear...
please give me some numbers/ ideas