1g randomly sputters, or stutters, weird

[davetheman81]

This just starting happening tonight, so i didn't have my laptop to try and catch what was happening in a log but basically i have been driving my new build around fine. Tonight after driving around town for 20 minutes in the rain, all of a sudden when cruising at 30 mph in 4th gear the car starts sputtering or stuttering and the rpms go crazy high to low and the wideband goes lean to rich, i pull over and then it stops and i drive off, 5 minutes later it happened again but only for a second, any ideas, the car is running fic 1350 injectors with a walbro 255 and aero a1000 afpr with 272 cams untuned on a 2g maf with dsmlikn v3 lte, just fuel global and dead time set and idle as well as maf, but timing and fuel zeroed out, maybe something got wet? my coil pack is reallocated in front the the strut tower near the water channels of the hood. Maybe i just need a tune, car didn't over heat , has oil, but i believe the sender is bad, the oil pressure gauge reads low when the car is cold, then it reads nothing until you boost, but i did drop the sender on a hard garage floor before putting it in and its 20 years old, i think if i had no oil pressure the motor would have been toast driving around by now, i just got a autometer oil psi gauge to install. any ideas on this weird stuttering? Thanks

 

[icancruz]

Sure does sound like something could have gotten wet. Is this the first time out and about in the rain since the rebuild? A stutter I would think would either be fuel or electrical.

 

[davetheman81]

Yep, first rain ride hopefully i can check it out tommorow and figure out what it was, definitly sounds like electrical or fuel though

 

[93tsi6bolt]

My car did this last nigjt also. My maf had got water inside the housing . I opend it up cleand the circuit board with electric cleaner let it dry and the resealed it with silicone and it fixed the issue.

 

[davetheman81]

Hey again, heres the run down and i updated my mods in my profile, this happened the other night when it was raining, and tonight when it wasnt, i drove the car for 30 min and everything was fine, then i make a turn and go to accelarate back to 30 mph, the car studders, or shutters, or spudders, then the tack immediatly shoots to zero and back up and then all over the place, i have complete lack of power, then the car back fires loud, and ushally stalls, i shut the car off and restart it and it does it one more time, then i restart it again and its fine, i have yet to catch this on a log, but any ideas? I did use a used fuel pump, i didnt replace my fuel filter, could it be a bad maf, maybe wires, does it sound like an engine issue, the engine runs and sounds fine before and after these episodes, and i always have oil pressure and no overheating, thanks, i just really hope its not the motor, and just a fuel or electrical issue

 

[potHead4sur]

By the symptons ykur are having might be tbat you hVe defective fuel pump and might be better that you purchase a new one and not a used one. Remember fuel filter is a must. Maintenace is a must. Alzo check for boodt leaks. Good luck and keep updated let me see what happens.

 

[davetheman81]

Would about a cas issue?