turbotaloon95

iTrader: (7)

I just starting digging in to ECUFlash and EvoScan with my Open Port 2.0 cable a few days ago. I've had experience with DSMLink back in the day, but this is my first time tuning an evo. I loaded Tephra V7 and started scaling the MAF at low end (closed loop).

I have an odd issue where idle and cruise afrs read a little rich. This has been the case since before I started tuning. The wideband reads between 13.8 and 14.5, and the ecu reads 14.0 to 14.8 roughly. My evo has an open K&N filter on stock intake tube, evo ix bov, and 3" TBE with no cat. I assumed scaling the maf should adjust these values, but they have not changed. My fuel trims are pretty close to 0 (< 5%), so I think that is ok. I looked at the fuel tables and they are stock at the moment. I'm not sure what else to check. Any ideas?

Also, on cold starts, afrs seem a bit leaner. Wideband reads in the low 15's and ecu reads similar. Once it is warmed up, idle gets back down to ~800 rpm and idle is same as above.

List of mods are K&N open filter, 3" TBE with no cat, and mbc set at around 21psi. Otherwise the car is a stock 03 evo 8.

turbotaloon95

iTrader: (7)

Anyone? I'm going to do boost leak and exhaust leak checks.

turbotaloon95

iTrader: (7)

I ran some seafoam in the car today to see for exhaust leaks. Absolutely no smoke except for out the end of the exhaust. However, after burning off all the seafoam and changing the oil, it appeared that idle afr's went lean about .2 points on average. I didn't log yet, but I'll log tomorrow on the way to work. Next up is checking for boost leaks.

X Double Dot

subscribed. My car tends to run a bit on the rich side at cruise as well (14-14.5 afr according to the wideband). It's got stock injectors so I've always wondered if it needed to have the MAF scaled.

Supergoslow

iTrader: (12)

Are you accounting for the fact that evos stock maps are rich from factory? I'm by no means a genius in tuning so off the top of my head I'm not sure what the stock numbers are but I do know I've done a lot of reading in the ecuflash tuning area and the stock maps are rich.

If you search you may be able to find a stock evo 8 map to compare to yours. I actually may have one on my laptop.

X Double Dot

you are correct, at WOT, the evo is rich from the factory. At cruise it should run off the front O2 sensor, which should target ~14.7 to my knowledge. My fuel map is the same as the stock one in the cruise cells.

The wideband ocilates like it should (rich-lean-rich-lean), it's just centered about the wrong number (14.2 instead of 14.7). Also, every now and then it swings rich (12ish) when i'm just cruising along, no change in TPS or load etc.

turbotaloon95

iTrader: (7)

It appears that the narrowband swings closer to the 14.7 mark, so I'm wondering if the wideband is reading slightly richer.

The gauge is different than what is logged by the laptop too. Usually the laptop reads 1 points leaner. I spoke to a tech at Innovate and he said it may be due to a weak ground and power source so I have to re-wire it and see if it helps.

domyz

iTrader: (6)

Maps have nothing to do with closed loop fueling. It's more part of the Narrowband o2 routine.

Also maybe your narrowband sensor is going bad.

turbotaloon95

iTrader: (7)

This is very possible, even though it's only a couple years old. The voltage oscillates, but looks a tad sluggish. I forgot what brand I got too, so I may have been some Autozone off brand stuff.

CammedEvo

iTrader: (5)

Your wideband likely needs calibrated.

http://www.innovatemotorsports.com/r...ycalibrate.php

turbotaloon95

iTrader: (7)

I've actually calibrated the sensor at least 6 times since I've installed it about a month ago.

I spoke to a tech at Innovate. The LC-1 is getting power from the radio wiring harness and grounded on some metal bracket inside the car. He explained to me that this may not be a sufficient source. I will have to re-wire it to get a dedicated power source from the fuse box and a better ground. I don't know how much difference that will make, but I may as well try.

CammedEvo

iTrader: (5)

Gauges are notoriously slow but the fact that it doesn't ever get to stoich or above puzzles me. I ground / power wiedband's off a cigarette lighter and don't get this kind of behavior.

Wheres the placement of your sensor?
How many miles are on it?
Any leaded gas used?
Did you buy it new?
Have you replaced it?

turbotaloon95

iTrader: (7)

The sensor is placed in the downpipe right after the bend. Its just slightly higher angle than horizontal. Not quite that 45 degree angle though.

The kit is brand new and has acted like this since it was installed. I've calibrated it several times as per the instructions with the same results.

The lc-1 seems to read about .2 to .3 points leaner when I log in evoscan.

I'm wondering if they can just send me a replacement unit.

turbotaloon95

iTrader: (7)

Oh, and no leaded gas.