"James Masologites" > wrote in message

> I have a 1989 CRX Si with MPFI. When warm, it starts up in one crank and
> catches strongly, no problem. However, when its sat for a while and
> become cold, it takes a good 3 or 4 seconds of cranking for the engine
> to catch, and even then, it kind of "burbles" to life (doesn't catch
> crisply).Another thing that confused me that might be related is that the fuel
> filter was not pressurized when I changed it. Warnings all over the
> place about releaving pressure and that it would spray everywhere, and I
> got nothing at all. This was with the engine cold.
> Could the rail be losing fuel pressure gradually? would this cause the
> symptoms i'm getting?

Sounds like an unstable fuel pressure. Probably from fuel pump check
valve or fuel pressure regulator. Clamp the fuel return line with a piece of
cloth and pair of locking pliers. If the symptom is still there, the fuel pump is
loosing it.