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Stalling when engine is warm, 0 vacuum, maxed out AFR

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Old May 14, 2025 | 11:00 AM
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From: St. Mary's County, MD
Stalling when engine is warm, 0 vacuum, maxed out AFR

So it's been awhile (like 4 years) since I had my car up and running. I built everything up and ran like a champ minus timing issue. Dropped it off to friends house and he fixed a leaking transfer case seal, and upgraded to S2 cams with springs and retainers. I pick it up and it runs like crap. While driving it's smooth as can be. Once the engine warms up, about after 5 or 6 complete stops the vacuum will hit 0, AFR reads ---, revs bad then stalls. I can't start it right back up either, it needs to sit for about 30 seconds then starts like a champ and drives normal for about 5 or 6 complete stops. I replaced the MAP sensor, cleaned throttle body, boost leak, checked all o2 sensors. When I went to log My Exhaust VVT target shows 0, actual shows -30. I took out the VVT solenoid, cleaned them up even though they were clean and same problem. I unplugged my cam sensor and evoscan read 0. So I swapped intake and exhaust cam sensor and...it hit -30 again. Can this be something messed up with the cam install? Attached log, one at startup and idle showing -30, the other showing 0 when I unplugged cam sensor. With it unplugged it idled fine like plugged in but never tried to drive it unplugged. Any suggestions on this? Just been a very long road. Brand new shortblock, rebuilt head, new turbo and ran like a champ before the cam install.
Attached Files
File Type: csv
Plugged Ex cam sensor.csv (31.1 KB, 0 views)
File Type: csv
Unplugged Ex cam sensor.csv (14.4 KB, 0 views)
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