- Navigation
Results 121 to 130 of 176
Thread: leaning out tune?
-
05-31-2017, 11:01 AM #121Lurker
- Status
- Offline
- Join Date
- Apr 2013
- Name
- Johnny
- Vehicle
- 1994 formula A4
- Location
- Henderson, TN
- Posts
- 935
Maybe causing the o2 to not read right?
Still trying to figure this thing out.
-
05-31-2017, 11:30 AM #122LTx Guru
- Status
- Offline
- Join Date
- Apr 2013
- Name
- Fred
- Vehicle
- 1994 Formula - SOLD
- Location
- Central NJ
- Posts
- 2,279
Extensions can make bad contact = open circuit = O2 reading stuck at ~450 mVolts. Corrosion, loose fitting pins can add resistance to the circuit, which shifts the O2 voltage readings (that would not necessarily set a code). Extensions can short to 12 volts = O2 readings stuck on high. Extensions can short to ground = O2 readings stuck low. All those would show up in the data log O2 sensor readings. Sensors not moving, stuck low or stuck high set codes.
A data log using Scan9495 might help. The data log you sent earlier is just too unwieldy to work with.... maybe 200 columns of blank data for things your OBD-1 doesn't even have, like a column for every known OBD-2 4-digit code. Also, the log has to be taken under the exact conditions that cause the problem to show up. That was not the case in the earlier log.SOLD - GONE TO A (VERY) GOOD HOME ! - 94 Formula A3+1: 381ci forged stroker - Callies Stealth, Oliver 5.85 billet rods, BME nitrous pistons / CNC LT4 heads / CC solid roller / TH400+GearVendors OD / 4.11 Strange 12-bolt / 300-shot N2O / Spohn Suspension / roll bar / MoTeC M48 Pro engine management system /a few other odds 'n ends.
-
The Following User Says Thank You to Injuneer For This Post:
-
05-31-2017, 12:18 PM #123Lurker
- Status
- Offline
- Join Date
- Apr 2013
- Name
- Johnny
- Vehicle
- 1994 formula A4
- Location
- Henderson, TN
- Posts
- 935
I'm just gonna have to break down and buy a laptop I suppose...
-
05-31-2017, 01:02 PM #124LTx Guru
- Status
- Offline
- Join Date
- Apr 2013
- Name
- Fred
- Vehicle
- 1994 Formula - SOLD
- Location
- Central NJ
- Posts
- 2,279
How did you do the Tuner Pro log?
SOLD - GONE TO A (VERY) GOOD HOME ! - 94 Formula A3+1: 381ci forged stroker - Callies Stealth, Oliver 5.85 billet rods, BME nitrous pistons / CNC LT4 heads / CC solid roller / TH400+GearVendors OD / 4.11 Strange 12-bolt / 300-shot N2O / Spohn Suspension / roll bar / MoTeC M48 Pro engine management system /a few other odds 'n ends.
-
05-31-2017, 03:19 PM #125Lurker
- Status
- Offline
- Join Date
- Apr 2013
- Name
- Johnny
- Vehicle
- 1994 formula A4
- Location
- Henderson, TN
- Posts
- 935
it was a pain in the ass, I put my desktop in the floor board, power inverter hooked to battery, monitor, and keyboard in passenger seat mouse on console..... not very fun lol
-
06-21-2017, 01:06 PM #126Lurker
- Status
- Offline
- Join Date
- Apr 2013
- Name
- Johnny
- Vehicle
- 1994 formula A4
- Location
- Henderson, TN
- Posts
- 935
DLOG-Save-2017Jun18-114410-2G2FV22P3R2250155.xls
@Injuneer
See if that works for you
-
06-21-2017, 04:07 PM #127LTx Guru
- Status
- Offline
- Join Date
- Apr 2013
- Name
- Fred
- Vehicle
- 1994 Formula - SOLD
- Location
- Central NJ
- Posts
- 2,279
Got it!
SOLD - GONE TO A (VERY) GOOD HOME ! - 94 Formula A3+1: 381ci forged stroker - Callies Stealth, Oliver 5.85 billet rods, BME nitrous pistons / CNC LT4 heads / CC solid roller / TH400+GearVendors OD / 4.11 Strange 12-bolt / 300-shot N2O / Spohn Suspension / roll bar / MoTeC M48 Pro engine management system /a few other odds 'n ends.
-
The Following User Says Thank You to Injuneer For This Post:
-
06-22-2017, 06:52 AM #128
As injuneer said, lazy O2's will not set off a code, they have to be completely dead, when scanning, the millivolts should be moving around like a slot machine, if they are barely moving then is might be the O2 themselves, wiring, connection ect.
-
The Following User Says Thank You to MoeHorsePower For This Post:
-
06-22-2017, 08:05 AM #129Lurker
- Status
- Offline
- Join Date
- Apr 2013
- Name
- Johnny
- Vehicle
- 1994 formula A4
- Location
- Henderson, TN
- Posts
- 935
There jumping pretty steady from 20 ish to 900ish
One is moving SLIGHTLY slower than the other
-
06-22-2017, 12:24 PM #130LTx Guru
- Status
- Offline
- Join Date
- Apr 2013
- Name
- Fred
- Vehicle
- 1994 Formula - SOLD
- Location
- Central NJ
- Posts
- 2,279
O2's appear to be working fine.
Interesting thing, a couple of the LTFT's have gone even more "negative":
First log L/R: Cell 2 - 128/129 ; Cell 6 - 117/118 ; Cell 10 - 121/121 ; Cell 11 - 124/126
Second Log : Cell 2 - 128/128 ; Cell 6 - 112/115 ; Cell 10 - 117/117 ; Cell 11 - 120/119
Good thing is it seems well balanced bank-to-bank
Still appears to be on the rich side in PE mode. If we can trust wide band sensors, in PE mode:
Left - Average 0.976 ; Right Average 0.984
In PE mode, Cell 15 was used and LTFT's defaulted to 128
Target idle is still 800 RPM. A bit of surging, with RPM ranging from 600 to 1,230 RPM. When this happens, advance ranges from 22 to 29 degrees (25.3 avg). As RPM drops, advance increases. Map also swings, reaching a peak of 71.6 kPa at the low (~600) RPM reading to 43.6 kPa at high (~1,200) RPM reading.
I'll keep looking.
I don't think the O2 sensors are a problem. The MAF still look high based on my experience. Averaging 11.3 G/SEC at ~850 RPM. But the Cell 16 LTFT's look good at 130/129. So not sure if MAF calibration, at least at idle is a problem. I just don't have enough experience on how much of the intake charge is lost at idle due to high overlap.SOLD - GONE TO A (VERY) GOOD HOME ! - 94 Formula A3+1: 381ci forged stroker - Callies Stealth, Oliver 5.85 billet rods, BME nitrous pistons / CNC LT4 heads / CC solid roller / TH400+GearVendors OD / 4.11 Strange 12-bolt / 300-shot N2O / Spohn Suspension / roll bar / MoTeC M48 Pro engine management system /a few other odds 'n ends.
-
The Following User Says Thank You to Injuneer For This Post:
Bookmarks