All I did was unplug the MAFS. Yes Im going of my wideband, and my software is HP tuners. How do I disable the fuel trims? Thanks for the help I really apreciate it. ,J

 

I was running with the MAFS plugged in. Im running a 1BAR map sensor. MAFS is maxed out by 4000RPM, I have been adding fuel past that RPM in the power enrich multiplier table. Is that table WOT only, or does it affect mid range as well? Thanks, J

 

You need to go 2bar or 3bar for that matter. Your fuel trims have a enable and disable temperature. Set it to like 284 or so so they are disabled. Are you using HPT. You might want to post up your tune on the HPT forums so it can be looked at.

 

Could the MAFS be bad? No matter what I do with the freq, makes no difference. When MAFS is plugged in AFR is 11.5:1 15%-40% TPS.

 

I figured it out. The power enrich was set to come in at 50KPA, my engine idles at 36KPA. The power enrich was set way to low. The aptmosphere up hear at 7000' is only 76KPA. I set it at 80KPA and it runs just where I want it.

 

That will do it, thats why I was saying to post it up. Sometimes its just something stupid, glad you got it worked out.

 

I wish I could post it, but I don't get on the internet with my laptop. I can't afford to get a virus.

 

email it? offer to email it next time. One of us will help ya out. I just caught this thread and was reading along wondering what your enablers were set at. Feels good to figure it out on your own eh?

 

It can get frustraiting some times. Im an experianced carb tuner, and I know what the engine wants. Im used to jets, power valves, air bleeds, and distributors. I need to find someone that knows both so I can help me cross refrence. Like for instance the problem I was having, would cross over to the wrong power valve, or metering rod step up spring in the carb world. Im actually having fun learning the EFI. It is actually easier than the old school now that Im getting my feet wet. I need to see if I can burn my tune, and logs on a cd so I can upload them into my home computer. I really hate to get on the internet at all with my laptop.

 

Like you, I have a labtop that I refuse to hook to the internet. I used c/d to transfer all my tunes and uptadtes from my house computer, now I use a usb key..

As far as carb tuning vs. EFI tuning, there really isn’t a direct cross over from carb adjustments to EFI adjustments. In the EFI world we have much much more fueling control, but on top of that we also can control the amount of air the PCM “sees” going into the engine.

As you know, there are a TON of fueling tables in HPTuner for fueling control. The most important of which is the injector control tables, mainly, the flow rate table. We know the value of this table from our injector manufacturers. It is really the only “hard” information we have, and all tuning is based from this point. We can control a lot of the fueling, but most of our adjustments are made in the power enrichment area. The power enrichment tables are only active once all of the “enable” tabs have been meet. So we only use the power enrichment for heavy engine loads.

Most of our tuning adjustments are made on the air flow side of the PCM. We tell the PCM how much air is going into the engine with the maf table and v.e table, the pcm then adjusted the injectors to hit the target air/fuel mixture.

You may understand this already, but it is really only “the tip of the iceberg”