Hey guys,
I just picked up a new to me SC to partner the 964 and for more daily oriented duties (Since the 964 is very track focused and the SC is stock).
The car is in good condition, starts every time, burns effectively no oil, etc...
However, there are a few niggling issues that I need to address and I wanted to solicit some feedback here.
I have done research and have a game plan, but know there's a wealth of information here that could help. One of the issues with the internet is that there's everything and nothing on it all at the same time.
Surging idle (250-1300 RPM) on warm start-up, specifically after I start the car after it being off for 10-30 minutes.
Check for vacuum leak(s)
Removing oil filler cap whilst running DOES result in a slight idle drop (Need to verify if 50 or 250 RPM)
Adjust CIS fuel mixture
Warm up Regulator diagnosis
When idle settles down it's steady at 950 (hunts slightly but solely as a result of the inherent characteristics of the CIS system)
Sometimes struggles to start when cold
Idles great once started, but can take 5-10 seconds of cranking to start
Not sure of potential cause here other than fuel pressure bleeding down after sitting?
Feels down on power < 2,500 RPM
This could be a characteristic of the 3.0 engine, but I don't think so.
The best way to describe it would be like turbo lag; it's pretty flat and gutless, then > 2,500 RPM comes alive and is very sprightly
One thing of note is that sometimes the car stumbles slightly under light throttle load and lower RPM < 2,500, especially when cold
Could this be a timing issue? I just got the car over the weekend and haven't had a chance to throw a timing light on it, or check for vacuum leaks, etc.
It does have a new O2 sensor, as a side note.
The car drove reliably and cruised nicely at 80 MPH from San Diego to Houston, so it's definitely solid, just a few little issues I need to take a look at and was hoping you guys could help point me in the right direction if I've missed something.
Gratuitous pictures:
