Is the car making any kind of noises or racket?
If its not blowing smoke then its probably an issue with the cylinder head.
I would advise against taking apart anything else. Once you start half-hazardly disassembling an engine you do more harm than good, especially in an all aluminum engine.
You need tools, not just a socket set and some screwdrivers. You need some good tools and or a lot of know how to make up for the lack of tools.
You can go as far as taking the valvecover off and taking a pic to show us anything unusual.
Fuel pump has nothing to do with low compression, you're skill level is not up to par with taking apart an engine. Im sorry.
A mechanical hobbyist and car enthusiast
1971 Datsun 240z Devil Z red
1999 740il Titanium Silver
2004 BMW 325i CW,PP and Sports Package
1996 toyota avalon-263,000-Sold
2003 Lexus Is300-Sold
2000 Acura TL-Sold
2000 Accord 5 speed-Sold
Last edited by Loaded325i; 11-21-2012 at 04:41 PM.