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Idle Hunt / Surge at cold start

Hi there....I have a new to me 88 3.2L that is has a idle surge at cold start.   

I've reaserched and see its an issue others have had...some for years.   and the resolution seems to be many possibilities. 

My question is how critical is it that i get it corrected?   

The hunting idle is between 1100 and 900 rpm for a few minutes and then settles to the appropriate range approx 900    

The car smells a little rich at times but other than that runs fantastic...so not sure if I should mess with it or not

Thanks for your input!!

 

Hard Start Issue for '84 3.2

When the car sits overnight in the garage after driving, it takes several attempts cranking the engine to get it to fire. It will fire then stall on many of the cranking attempts. When it does finally start it takes up to a minute for the engine to reach normal idle and stop mis-firing. After this routine, the engine runs as expected without issue. It will consistantly and without issue start as normal after this routine. I believe this occurs when the engine temperature is not raised. The engine was just completely rebuilt with about 200 miles currently on it.

#3 cylinder comp and leak down results suspect?

Shareing my results for a prospect 1988 911 3.2 for any feedback from those that might know a thing or two based on the numbers alone.

Car currently has 55k miles on it and has been driven less than 1k miles per year on average between 93’-19’ by it’s current owner. It has sat undriven regularly for the most part over the last 10 years. Seems to perform well and power feels strong and consistent through  all gears. Engine is also very dry.

Results from the PPI are:

Are these compression results acceptable?

My compression test results were, by cylinder: 150, 125, 150, 150, 150, 150, 150. The car runs beautifully, pulls strong, no issues at idle. Are these numbers acceptable?

Loud Noise coming from Engine ?

I have owned my 1989 911 Carrera for 8 years . I have had a mystery sound coming from the engine, now about 5 times in that period of time .

It sounds like it is coming from the Fan Housing , like fan blade is hitting something . But it goes away when warmed up.

Like I said it has only happened a limited amount of time . The First time was about a month after I made the purchase ( gulp )  

My mechanic could find nothing . About 2 months after that it came back , but again went away .

Loud Noise coming from Engine ?

 

I have owned my 1989 911 Carrera for 8 years . I have had a mystery sound coming from the engine, now about 5 times in that period of time .

It sounds like it is coming from the Fan Housing , like fan blade is hitting something . But it goes away when warmed up.

Like I said it has only happened a limited amount of time . The First time was about a month after I made the purchase ( gulp )  

My mechanic could find nothing . About 2 months after that it came back , but again went away .

HOW TO CLEAN INTAKE VALVES STATIONARY IN SITU

Am replacing engine compartment fuel lines, and intake manifold gaskets/spacers while in there. Injectors sent to the cleaners. Engine in car. Cylinders 4-6 intake valves exhibit varying degrees of tarnish to slight build up; no caking. Intend to clean them.  I do not have access to a walnut blaster. Am considering cleaning the intake valves one-by-one using a retail aggressive solvent for fuel systems.  To prevent cylinder/oil contamination I intend to bring each cylinder to TDC, spray the solvent, let it work, and remove residual as necessary.

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