Fuel injection manifold, fuel lines, injectors, etc

[wizard124]

Within a couple of weeks, I expect to perform some preventative maintenance on the FI system and its aged fuel lines. Upon reading SLO's recent thread, my plan is to fully remove the intake manifold and work on the fuel lines and injectors while it is comfortably on my work bench.

I'll replace the feed and return fuel lines, lines to each injector and the cold start valve, the injector seals, and replace all other vacuum lines and hoses (I bought the silicone hose kit from AutoRicambi). I plan to inspect, clean, and replace the injectors as required.

My engine is running pretty strong but there are a couple of issues. My cold starting isn't quite right. I'll check for the electrical signal to the cold start valve and then the function of the CSV itself. My thought is to do this just prior to pulling the manifold.
The other gremlin is my idle speed seems to vary. It idles faster as the coolant temperature rises and isn't as smooth as it should be. Maybe injectors or vacuum leak?

Is there a test for the pressure regulator? Or, should I just install a new one while I have things apart? Is there a fuel injector that outperforms the stock one....and should I just plan to swap them out? Any suggestions or advice is appreciated

[vandor]

>my plan is to fully remove the intake manifold

Why not just removed the fuel rail with the injectors attached?

>The other gremlin is my idle speed seems to vary. It idles faster as the coolant temperature rises

Possibly a lazy AAV.

>and isn't as smooth as it should be. Maybe injectors or vacuum leak?

Likely it's worth having the injectors cleaned. Vacuum leaks are always a possibility.

>Is there a test for the pressure regulator?

YOu can test the fuel pressure by disconnecting the cold start valve's hose, but likely it's unnecessary.

> Or, should I just install a new one while I have things apart?

Sure! Buy two. Just kidding The don't go bad a lot, so don't replace it.

>Is there a fuel injector that outperforms the stock one

No, not for a stock/close to stock engine. Just have yours cleaned at http://www.okinjectors.com/