Closing in on a problem

**steveo** · 06-23-2014

i'd use any scan tool that exports to CSV so you can graph stuff in excel or do math and averaging easily. if you can't do that it's worthless.

failing that, i could (or someone could) write you a script to parse that crap into a workable CSV file too....

**dave w** · 06-23-2014

I recently helped someone get "Setup" with TurnerPro RT for about $250.

The costs ...
Used Laptop from Best Buy (about $150)http://www.bestbuy.com/site/olstempl...at219300050014

ALDL Cable http://www.gearhead-efi.com/Fuel-Inj...uy-ALDL-Cables! or http://www.aldlcable.com/products/aldlobd1u.asp

Donation to TunerPro RT ... $39 http://www.tunerpro.net/downloadApp.htm

Open Office (free) https://www.openoffice.org/ (Similar software to Microsoft Office)

dave w

**EagleMark** · 06-23-2014

Your link to best buy did not work, but I found some laptops that start at $143. so considering refurbished with warrenty that fairly cheap way to get in!

Best Buy Link To Laptops

**1great40** · 06-29-2014

I have an older Dell laptop that needs a battery, I'm going to order a battery and a cable and download TunerPro. Looks like I'm fixin' to lean me way more than I ever wanted to know about efi.

**1great40** · 07-08-2014

Can anyone explain what type of influence the VSS has on idle? I always thought that when the vehicle is stopped, there's no input from the VSS. In my case, the VSS is going to a Dakota Digital SGI 5 universal interface and the ECU is supplied with a VSS signal from the interface. Also can anyone explain what closed loop idle is? Is it different than just regular closed loop operation? A previous poster was referring to something about a %TPS before the ECU would go closed loop idle or something like that. I'm confused for sure now! I guess I have a lot of terminology to understand first.

**Scrufdog** · 07-08-2014

On my 427 ECU, it needs VSS and TPS to set 'idle mode' which uses closed throttle idle and spark maps. If I remember right the TPS needs to be under 2.3% and the VSS needs to be under 3 mph. Closed loop idle means the ECU is using the closed throttle fuel map with the O2 sensor to regulate fuel (using INT and BLM), open loop idle means the ECU is only referencing the fuel map values and not adjusting them.

**1great40** · 07-09-2014

Ok, It's looking like I'd best go through the minimum air adjustment again since it seems that would effect the %TPS. I'll let you all know how that turns out.

I did set it initially when I got the engine running but it has since been messed with in trying to pick a new idle speed for the engine. I just guessed that since my IAC counts were about 10-15 at idle that I was still OK. The manual from Painless performance just explains the Minimum air adjustment and it tells you to adjust the "idle" speed during this procedure. It's misleading. I recently got a book about Chevrolet Fuel Injection and there's a spec for my engine of 400+25 RPM for the minimum air adjustment RPM.

**EagleMark** · 07-09-2014

If you have 10-15 IAC counts warmed up after a drive? Leave it alone!

I've read many instructions on how to set Min Air and they are all missing some important part of information. Plus not all chips are same idle RPM, so how can you set it to 425 RPM? Huh? Tell me how that works with an engine that has idle set to 525 RPM... would probably work on that one. But not yours set at 725-750 RPM!

**1great40** · 08-08-2014

Hi Guys,

Ii h ave been away from working on the truck until a few days ago. I'm in the process of getting an old laptop cleaned up and I'm going to download TunerPro.

I have no response from Robert about the cable so I'm looking elsewhere for one. One thing is for sure...I need to look at my IAC counts when I shift from Park to Drive..From what I can tell there is no control whatsoever on the part of the computer as to where the idle speed is set. I need someone to explain to me the difference between open loop idle and closed loop idle. Also I'm thinking that my minimum air adjustment is off and that may be interfering with the % TPS? I'm hoping to learn a lot by looking at what the engine is doing with TunerPro.

**1great40** · 08-11-2014

I went through the minimum air setting again tonight. I'm back to using the original stock PROM for the engine. My idle is about 650 RPM in park and it loads down to just under 600 in Drive. I can't tell with my Actron scanner if the IAC counts change when I shift from P to D because I can't get this scanner to operate in anything other than 10K mode I'm calling Actron tomorrow to see if there's any way around that. 10K mode defaults the idle to 1000 RPM so I cant see the counts at normal idle speed.Also, tomorrow I should have that old laptop ready to download TunerPro so even if I cant get a look at the IAC counts with the Actron, I should be able to as soon as I get the software up and running and my cable arrives.

**1great40** · 08-17-2014

According to Actron, that scanner operates only in the 10K mode. I received my OBD1 ALDL to USB cable yesterday and I have downloaded TunerproRT. Wish me luck :)

**dave w** · 08-17-2014

Originally Posted by 1great40

According to Actron, that scanner operates only in the 10K mode. I received my OBD1 ALDL to USB cable yesterday and I have downloaded TunerproRT. Wish me luck :)

It's more like homework, no luck needed.

dave w

**1great40** · 08-18-2014

You're right Dave

**1great40** · 08-25-2014

Well this is where I really found out how dumb I am. I have downloaded TunerPro RT and I can't get it configured. I have been trying to find out where to get the correct BIN file and the other files needed for a stock 4.3 chevy. Somehow I found a video on YouTube and that video mentions Code59.org I registered there and watched the video sever times and they make it look so simple but I'm totally lost. Any one who wants to point this greenhorn in the right direction feel free. :)

**dave w** · 08-25-2014

Sometimes it helps if you have someone with TunerPro RT experience set up the Laptop with you. Maybe there is someone local to you to help out?

dave w