My car is really hard to start everytime i park it over night or a long period of time, It would start but struggle at like 300 rpm. seem like it not getting any gas, sometime it would die out. I would have to pump the gas pedal like crazy before i start it and i have to hold the gas pedal so the rev is at 1000 rpm for like 10 second then the car would idle fine. If i shut it off right after it start up and idle normally, i would pump the gas pedal a few time and it would start like a charm.

 

i little more info would be useful. are you using a stock ecu or standalone. info like that

 

Im OBDI p75 tuned on hondata, everything was fine but it started doing this like a week ago

 

I wonder if its not holding fuel pressure. maybe leaky injectors or I think there is a check valve in the fuel pump.

 

I noticed that it started to get harder and harder to start the car, sometime i crank and it turnover but wont start. But i dont get it when once it started everything is normally and work fine.

 

there is a check valve in the fuel pump. My car had similar problems until i installed my walbro

 

Sounds to me like your iginitor is going bad.

 

lol maybe a starter?

 

Do you have a wideband O2? If so, what is your a/f ratio during start up and idle? I don't know about hondata, but on the aem ems if you have too much cranking fuel, then the same situation happens and the throttle needs to be applied to add more air for start up. To remedy this on the aem, I take out some cranking fuel until the engine starts with just the turn of the key.

 

i had this same problem this week with my car, its running hondata. but now it is fine.....i think it may have been because i was close to E w/ gas

 

I am using uber data and my car does the same EXACT thing but its not as bad. It will start right up cold but, warm it takes a few cranks and then turns over but struggles to climb to reg idle range but then idles normal after few seconds. I figured the reason it started up cold was because i have cold enriched in uberdata. I realized i was too lean at start up range in my fuel maps add some fuel and it should fix it.

 

I had my hondata tuned like several months ago and it just started doing this, Im thinking it could be my fuel pump eventhough it still prime.

 

Sound very much like your main relay is on its way out. Need more info though.