Running rich, help. - Page 2

Mike The Canadian · 05-12-2013, 11:48 AM

Quote:

Originally Posted by jackal2000

So you are flowing more air with those mods, but have not added more fuel with a tune so I totally believe it is leaning out. My PowrTuner might be for sale soon.

I don't think it would be leaning out that bad.
Before I got my tune done my car was still running spot on after a few weeks of the mods.

The car uses it's sensors to figure out what to do fueling wise and should adjust.
That being said, you don't get as much out of things without a tune!

04PONTIACGA · 05-12-2013, 12:26 PM

Couldn't he possibly have a vacuum leak(LIM or UIM gasket leak) that would cause it to run lean?

Considering he just did P&P manifolds, there may be a leak somewhere and if the air is getting in after the MAF this would cause a lean reading, right?

sleepyalero · 05-12-2013, 12:59 PM

Quote:

Originally Posted by AleroB888

But seriously, folks....

I'm going to go out on a limb and say there's nothing wrong there. Not that there's always room for improvement.

drive it down and I'll scan it with HP, then we'll run it at Ohio Valley

tempting lol

Quote:

Originally Posted by a.graham52

Do u have an ultra gauge? What r ur fuel trims in conjunction with ur wideband?

i do not

Quote:

Originally Posted by xXManwhoreXx

Starch llololol stoich bro

facepalm....

Quote:

Originally Posted by Mike The Canadian

I have you have a tune (which I thought you did) it could be your car going into "lean cruise" mode or whatever they call it for fuel consumption?

I wouldn't worry too much, although I like you watch my gauges like a hawk and it drives me nuts when they're not right!!

im glad you know how i feel lol

Quote:

Originally Posted by jackal2000

So you are flowing more air with those mods, but have not added more fuel with a tune so I totally believe it is leaning out. My PowrTuner might be for sale soon.

well i would figure the computer would learn okay more air coming in, lets add more fuel. and yeah? how much,

Quote:

Originally Posted by 04PONTIACGA

Couldn't he possibly have a vacuum leak(LIM or UIM gasket leak) that would cause it to run lean?

Considering he just did P&P manifolds, there may be a leak somewhere and if the air is getting in after the MAF this would cause a lean reading, right?

possible.. but it only does it in a 10 mph radius. so im not sure.

sleepyalero · 05-12-2013, 01:43 PM

alerob888 if you really want to i could head to KY early this week maybe and maybe we can do some adjustments?

AleroB888 · 05-12-2013, 02:44 PM

Quote:

Originally Posted by sleepyalero

alerob888 if you really want to i could head to KY early this week maybe and maybe we can do some adjustments?

I would not mind doing that, however I would only be able to read the PCM file and log some scans, but not change the file. I can probably get the licence beforehand for your PCM from HP Tuners, if it is not a custom file.

It is possible Milzy has parts of your PCM customized which should not be changed, or may have the file locked. Better get Mike to authorize it first.

sleepyalero · 05-12-2013, 02:50 PM

well i have a license thru HPT but i foget all my log in info and stuff....

i dont think mike would lock anything, ill ask to make sure. pm me your address so i can see how far of a drive it is please maybe we can meet up this week

sleepyalero · 05-12-2013, 03:00 PM

think a new fuel filter could help? been awhile since i have changed that.

AleroB888 · 05-12-2013, 03:21 PM

Quote:

Originally Posted by sleepyalero

well i have a license thru HPT but i foget all my log in info and stuff....

i dont think mike would lock anything, ill ask to make sure. pm me your address so i can see how far of a drive it is please maybe we can meet up this week

Well, Mike may have some proprietary custom files in there, which are a lot of work to develop, especially for the trans. There are some PCMs that won't allow scans, either. I was not able to read or scan one of the SCT concept cars some years ago (it had the 4T65E trans) back in CO.

I can try to scan yours, but that's a long drive just to find out, lol

Indy to Ft. Knox

sleepyalero · 05-12-2013, 03:30 PM

yeah that is true, i texted milzy, waiting for a reply, you think a fuel filter would help at all?

AleroB888 · 05-12-2013, 03:49 PM

Quote:

Originally Posted by sleepyalero

yeah that is true, i texted milzy, waiting for a reply, you think a fuel filter would help at all?

It wouldn't hurt, but I don't think it relates to what your seeing there.....

sleepyalero · 05-12-2013, 03:51 PM

well i googled what makes a car run lean, fuel filter is a possibility apparently. 12$ fix couldnt hurt especially since this one is 2-3 years old i think

Mike The Canadian · 05-12-2013, 04:22 PM

Yup go ahead and change it.

Does the car run lean at WOT? That's where a fuel filter would start to cause problems. It's still not a bad idea to change it frequently, especially since it's clearly not the 1st time you've done it!

sleepyalero · 05-12-2013, 04:33 PM

No car runs well at WOT. Just cruising at 65 after a few.

AleroB888 · 05-12-2013, 06:28 PM

Quote:

Originally Posted by sleepyalero

so i went on a good drive, got up to 65 mph set cruise, car ran normal (from looking at gauge) for a good.... 15 miles? or a little less? then started running lean. so i let off, went down to 55, and back to normal. set cruise again, slowly went up to 65 mph hitting the accel button. so... 55 mph wait a min or two, then hit it, 56mph, wait then 57 mph, so on to 65 mph. once again at 65 was running fine, then after about 15 miles again, it started to run lean.

....

If you put it in cruise, a PCM can modulate speed by changing spark or shifting gears. It can't shift with a manual of course. Sometimes the PCM will command the AFR higher in some modes of cruising. So you need to monitor "Commanded AFR" to see if the PCM is going lean by design.

sleepyalero · 05-12-2013, 08:49 PM

so i need to bascially hook up hpt and see what its saying? and not look at the gauge?

i just did a fuel filter on the car about to test drive on highway see if it still occurs. be back soon with updates

AleroB888 · 05-12-2013, 09:32 PM

Quote:

Originally Posted by sleepyalero

so i need to bascially hook up hpt and see what its saying? and not look at the gauge?
..

You would compare "AFR Commanded" to what you read on the gauge, that would tell you if it's normal operation for the PCM. You have to trust the gauge for the time being, especially at WOT.

sleepyalero · 05-12-2013, 10:56 PM

the fuel filter did not fix the problem, seemed to help a little but still shows on wideband im leaning out.

sleepyalero · 05-12-2013, 10:57 PM

Quote:

Originally Posted by AleroB888

You would compare "AFR Commanded" to what you read on the gauge, that would tell you if it's normal operation for the PCM. You have to trust the gauge for the time being, especially at WOT.

yeah, at WOT what should the AFR be reading?

AleroB888 · 05-13-2013, 12:41 AM

Quote:

Originally Posted by sleepyalero

yeah, at WOT what should the AFR be reading?

My 2003 stock V6 scanned from 13.1 at a standing start WOT run, and reached 12.4 at about 75 mph. That was "AFR Commanded."

However, the actual AFR most likely got leaner. I don't know, because there was no wideband set up on it.

Redog · 05-13-2013, 03:43 AM

Took Redog to the track today (Sunday) and I've been having a lot of problems with it running lean.

Got one good run and at WOT it ran at 12.2-12.6 the entire track. The other two times, yeah let's not talk about that.

I'm running a LS1 MAF, but I think that's a big part of my problem after looking at some tunes on the HPTuner's tune bank. Considering one guy with more work done to his car (hot cam, bored out) has Delta Flow Postive and negitive flows at 0.3 to 0.6 and mine is at 66.141