John P. wrote:
> 2001 crown vic 4.6...suspect fuel injectors are leaking fuel into the
> cylinders when sitting. How do i go about checking this problem?

1. Sniff for gasoline at the intake after the engine has been turned
off
for a minute.

2. Look at the injector signal pulse width while the engine runs.
Leaky
injectors will cause the pulses to be narrower than usual because the
computer will try to compensate for excessive fuel delivery by opening
the injectors less. Any good mechanic can read the computer output
and will know when the pulses aren't right.

3. Hook up a fuel pressure guage and see how fast the pressure drops
as the car is parked.

4. Pull the injectors, reconnect them to the fuel rail, and look for
drips
while the system is pressurized.

Don't try #4 except as a last resort, and I doubt you have a leaking
injector but more likely a problem with the pressure regulator or a
check valve. If the problem is just gas fumes, check the charcoal
canister and its plumbing and valves. Get a Ford or Mitchell manual
and follow its instructions before replacing parts. For fuel-computer-
emissions systems you want these books and not Chilton/Haynes
crap.