Hey Guys
Im tuning a track car which has had a Ls1 conversion, car has basic mods CAI, comp cam, custom exhaust.
The car cranks but wont fire, has spark, fuel pressure and injector pulse.
When logging found commanded AFR goes crazy, all the way down to 3.86 with injector pulse width going to 45ms.
This car has had numerous wiring issues, which we are sure we have sorted, just wondering if anyone has had similar problems?
What affects commanded AFR while cranking?
Last edited by Eperformance; 04-26-2017 at 11:13 PM.
Anyone????
Just want to find out what would command AFR to such a rich mixture. I know PE and open loop EQ ratio
will affect it but PE is obviously not active and I set open loop EQ ratio to 1 to test.
Have the tune file?
2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.
If you don't post your tune and logs when you have questions you aren't helping yourself.
Better if you post a tune file, but anyway there is a whole startup subset of parameters (under idle>>airflow AND under fuel>>general) and it can/does go (briefly) very rich as it initially cranks (logical if you think about it).
99 TA, Texas Speed LS376, PRC heads, 233/239 cam, Fast 92mm, 95mm TB, card style MAF, Tick TR6060, Strange 4.11 12 bolt axle & clutchpack diff, Strano springs/dampers, Vette 18" wheels, Vette disks, CTS-V calipers, 16lb flywheel, long tube headers, no cats.
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