Autotune result making engine run worse. Data attached.

[MjrLeeStressed]

I have attached my data files based while running Autotune at low speed in 2nd grouped in about 1000 rpm increments.

Car is a Triumph Spitfire 1500. ie: low power and no turbo etc

Can someone suggest why the engine appears to be searching for the correct fuel. I manage to get whiplash at times. Very jerky!

[MjrLeeStressed]

Ad Lib: image supporting my original post.

[TimoL]

Wideband calibrated?
Does it get worse even when maintaining steady throttle or does is just stumble when quickly applying more throttle?

[tryingbe]

[MjrLeeStressed]

Good pick up!
I forgot the msq (now attached)
the msl has been re-uploaded in this post.

I have tried to show steady revs at about the 1500, 2000, 3000 and 3500rpm intervals. the msl finishes with a short idle.

Interesting comment about the Wideband being calibrated. I was reading about that yesterday and figured I should do that as I know it's never been done in the time I have owned the car (4+ years) as I have never had this tuning problem until this year. I understand I need to disconnect the Oxygen sensor from the exhaust and calibrate it in 'good air' - I have a techedge WBo2 2J1 and probably a Bosch LSU 4.2 7057/7200 sensor.
Edit: My EGO settings image include now.

[tryingbe]

Any reason why you're not using the MS2-extra firmware?

[MjrLeeStressed]

Any reason why you're not using the MS2-extra firmware?

I thought I was up to date! Clearly not.
I'll work out what I need to update the firmware next. Thanks!

[tryingbe]

Any reason why you're not using the MS2-extra firmware?

I thought I was up to date! Clearly not.
I'll work out what I need to update the firmware next. Thanks!

Start here

http://www.msextra.com/downloads/

[TimoL]

Good pick up!
I forgot the msq (now attached)
the msl has been re-uploaded in this post.

I have tried to show steady revs at about the 1500, 2000, 3000 and 3500rpm intervals. the msl finishes with a short idle.

Interesting comment about the Wideband being calibrated. I was reading about that yesterday and figured I should do that as I know it's never been done in the time I have owned the car (4+ years) as I have never had this tuning problem until this year. I understand I need to disconnect the Oxygen sensor from the exhaust and calibrate it in 'good air' - I have a techedge WBo2 2J1 and probably a Bosch LSU 4.2 7057/7200 sensor.
Edit: My EGO settings image include now.

My bad, I actually meant Voltage/AFR calibration in TS (Tools -> Calibrate AFR Table...).
But you really should update the FW as tryingbe suggested.

[benckj]

I note the comment in signature about E85 tuned. Have set up the target AFR figure for this fuel and used the tool function to create a decent AFR target table?

Jim

[MjrLeeStressed]

Good pick up!
I forgot the msq (now attached)
the msl has been re-uploaded in this post.

I have tried to show steady revs at about the 1500, 2000, 3000 and 3500rpm intervals. the msl finishes with a short idle.

Interesting comment about the Wideband being calibrated. I was reading about that yesterday and figured I should do that as I know it's never been done in the time I have owned the car (4+ years) as I have never had this tuning problem until this year. I understand I need to disconnect the Oxygen sensor from the exhaust and calibrate it in 'good air' - I have a techedge WBo2 2J1 and probably a Bosch LSU 4.2 7057/7200 sensor.
Edit: My EGO settings image include now.

My bad, I actually meant Voltage/AFR calibration in TS (Tools -> Calibrate AFR Table...).
But you really should update the FW as tryingbe suggested.

Your back seems good to me:
I will skip the FW upgrade due to suffering 'Clueless Maximus'..
I rec'd this message and had a glimmering thought that it might be time to revert to Twin Webbers @ $2000 to convert back.

I'll look at calibrating the AFR tables after I've sorted the oxygen sensor module calibration next.

[MjrLeeStressed]

I note the comment in signature about E85 tuned. Have set up the target AFR figure for this fuel and used the tool function to create a decent AFR target table?

Jim

Not sure about the E85 here... I'm using 98 octane unleaded fuel.
What am I missing?

[R100RT]

Don't loose heart, reading the manuals (and then ) will be your best friend (that is, manuals in the section that applies to your product and firmware, beware random, stale web copies and such)

[MjrLeeStressed]

Don't loose heart, reading the manuals (and then ) will be your best friend (that is, manuals in the section that applies to your product and firmware, beware random, stale web copies and such)

Not so easy it seems on this project. I need a break as my latest results are:

Just now..
1. Calibrated to oxygen sensor per manufacturers instructions.
2. In TunerStudio for Techedge 2J1

- EGO sensor = Techedge Linear
- EGO control = Single Wide Band (default values remain)

3. Re-generated the AFR table
4. Re-generated the VE table

5. Started car... seemed OK.

6. Autotune started (normal running temperature engine)
= VE values started to double, black smoke, rev drop then stalled.

7. Eventually, turned engine off, put the car in the garage, typed this message and likely not to attend a car rally in 3 days.

Working hard to stay calm.

[MjrLeeStressed]

Old tune loaded as benchmark. May be a bad move; files attached may help!
Oxygen is at 18.9 and won't change ??

[benckj]

Not sure about the E85 here... I'm using 98 octane unleaded fuel.
What am I missing?

Apologies it was one of the other signatures I picked-up on.

From all the info provided it seems likely the O2 sensor is not being used as the correct input for AFR target. I may have missed this point but do you have a gauge which is separate from TS display that the values can be checked against? There is also a significant delay in O2 measured vs real values that may need to be taken into account if sensor is a long way from engine.

In my experience VEAL works very well and have had no problems building good a VE table. It doesn't remove the 'human interface' but certainly takes away the routine operation. Have you tried to log a run then run the data through the calculator to suggest changes to VE table? May try and do this way to see where the issues are.

Jim

[MjrLeeStressed]

Thanks for the tips Jim.
I'll play with the options again tomorrow.
I have the sensor in the exhaust.
It runs to the Techedge which goes to Megasquirt.

Perhaps photos will help explain what i have. Starting work now.. Stay tuned!

[tryingbe]

I use this to make my initial VE table.

http://www.megamanual.com/v22manual/vetable.htm

And this for AFT table.

http://www.useasydocs.com/theory/afrtable.htm

Your "require fuel" calculation (under injector control) is for a 350 cubic inch engine. Are your injectors 30lbs / hour?

[Laminar]

For the moment, disable EGO control. Right now you have two things affecting pulsewidth - VEAL is modifying your VE table and EGO control is adding or subtracting to the pulsewidth. Narrow it down to one factor.

[Laminar]

Your "require fuel" calculation (under injector control) is for a 350 cubic inch engine. Are your injectors 30lbs / hour?

Looks like the "CC" box is checked, so that'd be a 350cc engine, which is also wrong. Changing it to a 1500cc engine makes a big difference on the req-fuel.