RPM delay and hard to start when cold

[Otto]

I'm experiencing some weird issues every now and then while accelerating. Even if the engine is well warmed up and I hit the accelerator, there's a little delay before anything really happens. Sometimes there's no delay, and at worst there may be even a three seconds delay.

I'm not totally sure, but there might be a connection with my cold starting issues. Because when I get the engine running cold it coughs and sounds like choking. It could be a fuel line issue, couldn't it? In case so, then what part do you think would be good to check? I've changed to fuel filter and tested all the pistons. Next I'm going to install an fpr, so that'll help me slightly with the diagnosis.

Do any of you have had similar problems, or even ideas about the cause? Thanks in advance.

 

[viperlp01]

When was the last time you changed your oil. sometimes 10w-30 i really thick on a cold day and stall out your engine alittle. If you havent changed it put 5w in and see if that helps with the cold start problems. also you can adjust the idle