Porsche Repair: oil indicator, fuel pressure gauge, air flow meter

Question
hi,
yes the car is starting..:)) .i tested the trottle position swich and the air flow meter (like its says here..http://www.clarks-garage.com/shop-manual/repair-procedure-index3.htm) and the trottle position swich didnt work normaly,so i cleaned and adjusted(but now the idle its little higher,and cant adjust it very good,the throttle adjustment screw is full closed,but the fuel consumption indicator indicates normaly,little les i could say..hope i didnt do something badly) ,air flow meter works fine.but from my study i found out that problem for not starting some times could be the fuel presure regulator so i want to see if this one is working,i want to teste it how is described here(http://www.clarks-garage.com/shop-manual/repair-procedure-index3.htm),i took the first injector sensor out to see if the engine will start and if it will run,and it did..and there its says that if the engine will run then the fuel presure regulator can be bad..do u have any sugestions how to tested? i want that everything runs fine..but the eternal problem r the money :-(,so im taking one at a time...
  thank u for ur patience and sorry if i wronte something wrong or ncomprehensible..  

Answer
The best way to test the pressure is to install a temporary fuel pressure gauge.  Here's a couple websites that give you an idea:

http://www.2kracing.com/product_info.php/cPath/47/products_id/1048?osCsid=cacb03

http://minimopar.knizefamily.net/quickfpg.html

I'm sure you can find gauges that are less expensive. In one car I own, the pressure is fairly critical so I ended up installing the gauge permanently.  So...I can check it anytime.

There is another method to test the pressure.  Don't quote me on this because it takes some math skills, but basically you turn your engine on with the fuel line disconnected and running into a bucket.  Let's say you crank the engine for 5 seconds.  Once you measure the volume of fuel in the bucket ( 2 liters for example) you calculate what pressure would have to be exerted to create that many liters of fuel in 5 seconds.  There is someone who knows a formula for this but I don't have a name or reference handy at the moment.  

So, the first way costs some money, the second way is free, but your head will explode trying to do the math!

Dave