The check enginge light,ABS light, brake and low fuel light come on and off at will. A recent miss in the running of the engine led us to the fuel pressure regulator. All spark plugs were replace in the past 2 months, yet the mechanic told me the plugs were fouled out as well. I know these are not all related, but the fuel pressure regulator has me puzzled. Where can i go to get detailed description/pictures of where this is and what it does, what typically cause these to fail, etc. Thanks.