Olds 88 Hard to Start

My 1999 Olds 88 with 3.8L V6 engine takes a long time to start when cold. It cranks about 5-8 seconds before starting, but when warm, it starts almost immediately. Once started, the engine runs fine with no hesitation or lack of power. I had the fuel system cleaned, but that did not appear to help. A rebuilt engine was installed about 20K miles ago, but it was doing the same thing with the previous engine. Any ideas?

I don't think it has anything to do with the engine, I would check out the starter and the carburetor.
Also take in account that the colder it is the longer it will take to start any car (no more than several seconds I mean)

try this turn on key do not start car listen and see if fuel pump runs and come to a stop if not.you my have a fuel flow regulator or pump or injector leaking presure is not coming to pressure.or a bad relay under hood black electrical box on fire wall.i own a 88delta it cranks over two or three times at 37 degrees.cranks instantly when hot with click run no errrr.also be ware the ignition module controls fuel system via fuel pump relay. so turn key on till pump stops and should start quickly this should be done any way in cold weather.i am from upstate ny starting in o to 5 below. youlet the pump build pressure first.

by the way ratchet this car is a multiport fuel injection carburetors a thing of the pass.my olds 88 3.8 v6 4t60 transmission.

Hobbist, thank you so much for this valuable information. I hope olds88owner will check back in here to see it. Even if not, I think more people facing the same problem will be helped by this

Thanks, Hobbist. I tried your suggestion. With the engine cold (and outside temperature about 20 degrees F), I turned the key on without starting the engine. I listened carefully, and did hear what I believe is the fuel pump running for a couple of seconds and then stopped. I waited a few seconds more, then turned the key to start position and the engine started after 2 or 3 cranks (about 3 seconds). Without going through the above procedure it was taking 8 or 10 seconds, so it definitely helped. I think your idea of the fuel pump needing to build up pressure was correct.

Is this something unique to this vehicle? I've owned many other cars with fuel injection, and the engine always started immediately, even when cold.

no nothing sepcial sound like your car is in good condition.a few minor maintence issues i am orginally from upstate new york cold country.you might want to change your fuel filter.air cleaner. wires. damp cold mornings wires are wet you can spray wd40 on the wires to prove this.may a plug or two.clean your battery terminals.look at it this way ever little bit helps you know i mean.i am glad my suggestion was a help a least you know were your at.

ps: use dry gas every fill up in cold country moisture builds up in tank during winter muggy days till car condition improves.that all i can think of for know.