random stall with easy restart
Quote from 7.4 4x4 on January 23, 2026, 4:57 pmHere's the problem. My 30002 is stalling at random times, cold and hot, driving and at idle, no apparent common thread. It's a new install, it starts and runs fine, I'm still using the default tune, I haven't changed anything yet. I have double and triple checked the wiring and connectors. No fault codes. Idle is at about 800. IAC steps 1-3. sometimes dropping to 0. The stall is clean, no sputtering, just like someone turned off the key. But it starts right back up no problem. It seems to happen more at low rpms, but it's done it on the freeway, too. Anything anyone can suggest before I start bothering the help line? I'm not noticing anything on the dash when it stalls, but it's hard to be looking exactly when it stalls out. If I had to guess, it sounds ignition related, but that's just a guess.
Here's the problem. My 30002 is stalling at random times, cold and hot, driving and at idle, no apparent common thread. It's a new install, it starts and runs fine, I'm still using the default tune, I haven't changed anything yet. I have double and triple checked the wiring and connectors. No fault codes. Idle is at about 800. IAC steps 1-3. sometimes dropping to 0. The stall is clean, no sputtering, just like someone turned off the key. But it starts right back up no problem. It seems to happen more at low rpms, but it's done it on the freeway, too. Anything anyone can suggest before I start bothering the help line? I'm not noticing anything on the dash when it stalls, but it's hard to be looking exactly when it stalls out. If I had to guess, it sounds ignition related, but that's just a guess.
Quote from Austin DeHaas on January 23, 2026, 10:38 pmLearn to catalog and retrieve. There are videos on Fitech.com.
Get a 2 minute log at idle and up to operating temp.
i can look at it or the techs can as well.
Learn to catalog and retrieve. There are videos on Fitech.com.
Get a 2 minute log at idle and up to operating temp.
i can look at it or the techs can as well.
Quote from 7.4 4x4 on January 24, 2026, 3:25 pmI tried to attach a log but I don't think it worked. I did get an error code of 64 for a few cells, I will go check my fuel pump wiring. I'm running a 50101 pump with 12 ga wiring to the rear from the relay. One long run, so I'd be surprised if it's grounding out anywhere. I also had a code of 105 before I started the truck...which is a bad ground? I'm grounded to the block, which is strapped directly the the frame on both sides, but I'll check just the same. I'll try again with the log.
I tried to attach a log but I don't think it worked. I did get an error code of 64 for a few cells, I will go check my fuel pump wiring. I'm running a 50101 pump with 12 ga wiring to the rear from the relay. One long run, so I'd be surprised if it's grounding out anywhere. I also had a code of 105 before I started the truck...which is a bad ground? I'm grounded to the block, which is strapped directly the the frame on both sides, but I'll check just the same. I'll try again with the log.
Quote from Austin DeHaas on January 24, 2026, 5:35 pmMy suggested grounding method. Battery ground should go directly to engine block. Frame and Body grounds should be at least 10 gauge directly to the battery. Not recommended to ground frame or body through the engine. Can cause issues with EFI. Especially on vehicles that weren’t originally injected.
My suggested grounding method. Battery ground should go directly to engine block. Frame and Body grounds should be at least 10 gauge directly to the battery. Not recommended to ground frame or body through the engine. Can cause issues with EFI. Especially on vehicles that weren’t originally injected.
