Help in CT

[willforster24]

Working on finishing my rb25 swap in my s13 and it will idle for a little just with a misfire and then die I have replaced just about everything and can’t figure out what to do next

[blkvrtswp]

- Wrong MAFS? Verify part number
- Fuel lines backwards?
- Big vacuum leak? (use a boost gauge)
- Injectors stuck flooding engine? (check oil for fuel smell)
- Throttle not opening or idle control not working?
- Unplug coils 1 by 1 while running see if any 1 does NOT make it worse - could be bad
- Same thing with injectors - unplug while running 1 by 1, all should make it run worse

Just some basics
Good luck

[brndck]

pee on it.

you need to check things like fuel pressure, both KOER and KOEO, if you have an aftermarket FPR, make sure the diaphragm isn't leaking,