Quick "After AutoVE" Question

[SweetS10V8]

I did my AutoVE tuning and put it back into closed loop using the MAF again.

Under load my LTFTs, depending on the day, are 0-5% going up hills, accelerating, when torque convertor is locked and slight throttle is applied, etc.

When Im cruizing, very light load, they are always in the 18-25% range. My widebands are still reading 14.7-15.2 even at 25%. Those AFRs are perfectly fine, but I know the O2s are having to add fuel to get the AFRs there and with open loop it would be off without correction.

A quick touch of the gas to accelrate 5mph puts my LTFT at 0-5% as stated before.

Just wondering if this is normal?

[5.7ute]

After doing AutoVE, if you are going to use the maf you also need to do the automaf procedure. This has been discussed a fair bit so a quick search should help you find the procedure.
FWIW it is not uncommon to have the fuel trims read off after doing autove, especially if long tube headers are fitted as they move the sensors further back in the exhaust stream. You may need to adjust the O2 sensor switchpoints to get them to correlate with your wideband.

[SweetS10V8]

I did just add longtubes along with cam, cnc heads, and mandrel exhaust.

Funny you bring up the adjusting something for the wideband. I have noticed my wideband acting strange, crusing along it will spike to 19 and back to 14.7. Then stay at 14.7(ish) for about 2 seconds, then spike to 19 and back in the blink of an eye. I realized the wideband wasnt messed up because on decel, it was rock solid.

I thought I had an exhaust leak somewhere, but I have check and rechecked. Maybe its my switch point??? I dont know what that is, but Im assuming its the point the narrowband sensor the computer uses to head back towards stoich.

[joecar]

Post some logs...

Where do you power your wideband from...?

[5.7ute]

I did just add longtubes along with cam, cnc heads, and mandrel exhaust.

Funny you bring up the adjusting something for the wideband. I have noticed my wideband acting strange, crusing along it will spike to 19 and back to 14.7. Then stay at 14.7(ish) for about 2 seconds, then spike to 19 and back in the blink of an eye. I realized the wideband wasnt messed up because on decel, it was rock solid.

I thought I had an exhaust leak somewhere, but I have check and rechecked. Maybe its my switch point??? I dont know what that is, but Im assuming its the point the narrowband sensor the computer uses to head back towards stoich.

A failing wideband sensor can spike lean under load( It is how my sensors have acted when they have failed).

[SweetS10V8]

A failing wideband sensor can spike lean under load( It is how my sensors have acted when they have failed).I'll try new sensors...thanks.


Post some logs...

Where do you power your wideband from...?My lighter socket went out on me, so I bought some 14g wire and ran a direct line from my battery to a remote power outlet(cigarette lighter) I bought. I'll post a log tommorow. I left my laptop at work.