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Old 02-05-2016, 07:48 PM   #1
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Default Spike in air fuel ratio

What's up guys

I have run into a issue and can't figure it out. My car is a 04 msm with 56000 with the big enchilada from FM using hydra. I had a datalog tune done by Ken Hill and she was running awesome but now I'm getting some hesitation while around 5k rpms. Did a datalog and found the a/f is all over the place. I have checked the spark plug gap, injectors are firing. I have 3 month old coil packs on with the 8.5 mm wires. Alternator voltage is 13.9 in hydra 13.5 at the battery. Wideband was calibrated before tuning started. She drives pretty well besides the hesitation. No real bucking or power issues. I'm a little stumped. Any help would be appreciated.

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Old 02-08-2016, 02:17 PM   #2
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Are you running through the gears in this datalog? What's your driving like?
I see that it spikes up to ~18 when you really mash the throttle. What's hydra's acceleration enrichment like?
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Old 02-08-2016, 02:26 PM   #3
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Post a pic of the throttle pump fuel trim map. That would be a good place to start
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Old 02-08-2016, 05:37 PM   #4
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I'm sorry I forgot to update I found this awesome wiring job to my crank positioning sensor

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