Hey guys I have been checking over all the forums and I've done everything they have said nothing is working.
jdm b20b less then 50,000 miles
Ls intake
map,tps,injectors,ecu,fuel pump have all been changed still no change compression is good timing is good already ruled them.out. No intake leaks runs really rough takes a long time to start. When it does start idles at maybe 600 if that on a good day surge while getting up to speed. Don't wanna hurt this motor if you need videos of proof of what it does shoot me a message on Instagram can't post videos on here want support the files any help would be great.

 

What ECU are you using ?

 

I'm using a p28 with a b20 base map

 

So, you are admittedly using a "Base Map" at this point... now it is time to go and get your car properly TUNED. I am sure that your extensive searching found this answer already... as well as the knowledge that a "Base Map" is just that... basic engine programming that allows one to start, run the engine at light throttle to bleed the cooling system and seat the piston rings... and then pull it up on a trailer so you can transport it to the tuner of your choice.

You are making the assumption that you have done something wrong mechanically... it is entirely possible that this is out of your control.

 

yes I am using a base map yes i know that's really all it's for but the only car I have so gotta make do with what I have to do now
come to fine out it was the fuel pressure regulator replaced ot it is fine now but starting to do the same thing again so imma try and replace it with a brand new one again I found one I had laying around and back to the same symptoms again you squeeze the return line it runs fine and like it's supposed to you let go back to the same thing again
yeah I might have to find a place that can tune it at this point and see how it goes