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Stalling after start, help!

Old Aug 12, 2016 | 01:47 PM
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Default Stalling after start, help!

I can't win with this car.

So. Pretty sure this is my fuel pump but wanted to float it past you first. Car starts strong, idles for 4-5 seconds, stalls out. No change in idle time between attempts. Full tank of gas this time. Over the past week or two I've noticed a loss of power at wot between like 4K and 6k rpm's. I'm thinking this all points to one of the two fuel pumps quitting. Exhaust smells really rich. Another curiosity though, tried to log the few seconds of run time and every time I start the car the Cobb loses its connection.

Any ideas?
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Old Aug 12, 2016 | 08:26 PM
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Updates: Got some logs, no stored codes. I plugged in a batt tender and reflashed the tune, the car idled a smidge rough but strong and lasted probably 3-4 minutes. I unhooked the tender, waited, hooked it back up, engine stalled out maybe a minute later. After the reflash the exhaust cleared up some of its richness but still had a hint of rich.
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Old Aug 13, 2016 | 01:09 AM
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Try cleaning the maf.
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Old Aug 13, 2016 | 02:11 PM
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So I flashed stage 0 back on and it tried to stall out the same as the tuned map but caught itself a few times and then started running like normal. Stage 0 should run rich on my car as I have 1000cc injectors (no other mods, long story). Flashed back to tune and no change. So something about stage 0 allows it to power through the stall attempts and then level out.
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Old Aug 14, 2016 | 01:40 AM
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Test your forward O2 sensors, along with the MAF suggestion.
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Old Aug 14, 2016 | 10:57 AM
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Figured it out, fuel pump 2 relay burned out. Swapped relays, runs fine.
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