- Fri Apr 07, 2023 9:05 pm
#62350
It looks like its running lean. CLT is 39* C does that sound correct?
Mere Mortal 

LPG2CV wrote: ↑Fri Apr 07, 2023 9:05 pm It looks like its running lean. CLT is 39* C does that sound correct?I would say this is correct especially if it was the first or second start of the day, which I think it was from memory.
Izzy46 wrote: ↑Sat Apr 08, 2023 3:01 pmSo it seem that ASE is another factor I need to consider. What is the best way to approach enrichment in relation to the VE table and AFR...?Everything in the tune relies on the base tables first. Then additions are made for other conditions, such as cold-start. This means you must find a way to get it started and warmed-up to operating temperature in order to tune those base tables. There are various methods to get this done, and one I use is to adjust R_f (Req_fuel value) as a global fuel "knob", only for this task. If it is drifting too lean to remain running, I increase R_f for enough fuel to keep running. As it warms, it may go rich, and so I again adjust R_f enough to continue warm-up, and so on. Once warmed, I can juggle R_f back to its original value, or in coordination with the VE Table. There are other methods.
PSIG wrote:Note that most functions are additive to the base tables. So, until your [idle area] VE and Spark Tables are fully tuned in a warm condition, the additives (e.g., priming, ASE, WUE, etc) are not predictable or effective under those different conditions. If you tune them to be effective before table tuning, then they will of course drift with the table changes. Tune again. And again.
PSIG wrote:After that setup review, get it started and warmed-up somehow to "normal" operating range and verify GammaE is close to 100, and if not, why not. Then tune to your target warm-idle rpm, adjusting fuel to typically what reads as minimum MAP. If your engine is stock, it will typically be around 30-ish kPa and stable.
Then you can zero your cranking and warmup settings to begin making incremental adjustments to warm start priming and cranking enrichment (starts quick & easy then dies immediately), then ASE (starts quick and runs well for seconds and dies) and then WUE (starts quick and runs well to your tuned warm idle). If you're not seeing the value of logical progressive steps, search for posts on how you can do this process, so it starts quick and clean to a good idle and warms-up before you begin tuning off-idle. There are other methods.
For Lambda to read for helpful data while starting, check your AFR controller power does not skip when you go from Run to Start. If it does, jump-wire power to it so it warms in Run and stays warm during the start cycle without resetting. Off-topic, but I use a hot (ready) sensor for start/warm-up (tuning only), and have never killed a sensor, nor have evidence that it significantly impacts sensor life in this limited use.
OK, I tried that and runs for as long as the enrichment lasts.So, I'm pretty much going to para phrase PSIG![]()
So that would suggest that I'm runner her too lean?
I suppose I need to up the numbers on the VE table to compensate?
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