STIU2SLO

Hey everyone, I got a 03 evo just installed some comp 272 cams, a walbro 450 and a fuel lab regulator. after i installed my cams car started no problem idled good could 2 step no problem but my regulator was at 60psi at idle. so i drilled out the syphon and brought it to 43psi at idle which is normal. Turned it off for the day, the next day car started fine. now it starts, runs for 30 seconds maybe, then dies, will start again and die immediately, if u try giving it gas it stalls also. i made sure pump is still functioning all plugs and wires are connected check vacuum lines and still nothing. Threw my scanner on it only code is EGR which shouldn't effect it.... any suggestions are greatly appreciated thank you!

jamrockevo8

Try starting it with your maf unplugged

fuzzynads

You my man, are a legend.
​​​MAFless connector backing was found to have slight oxidation, obviously enough to disrupt ignition/engine start sequence.