boosted94gsr

Yeah that's what I'm saying too much variation in idle afr in open loop all the time. It probably doesn't hurt anything, but it just annoys me lol. To use your wideband for closed loop select "closed loop- wb input (voltage target), set target voltage to ~2.5, you can mess with the voltage to get the afr you want. Higher voltage equals leaner, lower is richer. Max map for closed loop should be ~700 mbar or equivalent to whatever units your map uses. Since the wideband has bigger voltage swings then the factory narrow band you want to adjust your min max short term adjustments to about +10 & -10%. Closed loop will make the afr jump from slightly rich to slightly lean, this is how it operates from the factory. If you get huge swings in afr either your short term fuel trims are too big, or your ground for the wb to ecu isn't very good. You could also just enable closed loop for idle only, by setting max engine speed to ~1500rpm. Usually you don't need to mess with any other settings I didn't mention, default should be fine. Honestly the closed loop operation in these 20+ year old 8 bit ecus is not the greatest, but they get the job done. Hope that helps. Let me know if you have more questions.

boosted94gsr

Forgot to mention you need to select your wb input source under "closed loop advanced", typically you wire your wb to d10 eld, but select whatever one you use.

2kdrift

thanks for the info, I already have my advanced tab set up for AFR data logging. Just need to look up voltage specs for my AEM wideband and Ill give it a try

boosted94gsr

Nice. Yeah start with 2.5 volt target and see how that works for you.

2kdrift

according to the AEM specs
2.5v = 13.25 AFR
3.1v= 14.7 AFR

still recomend 2.5v?

boosted94gsr

Are you sure?

2kdrift

maybe AEM UEGO has different readings then a AEM FAILSAFE
I have an AEM Failsafe

boosted94gsr

Got it. Yeah then use the voltage that correlates with your target afr.

2kdrift

thanks again

/threadjack end

boosted94gsr

Any time man. Always happy to help.

Right lol.

m0sad

m0sad

anyone ?

LightningTeg

sorry what's the gap at right now?

m0sad

TheShodan

iTrader: (14)

Unfortunately, after watching and listening many times, even with quality headphones, I can't hear it.

m0sad

m0sad

Anyone else?
can it be from bad injectors/resistor box?

TheShodan

iTrader: (14)

Nope. those won't cause that. If they were even remotely an issue, you'd never have the engine run at all.

m0sad

?If one of the injectors is licking
it cannot cause this?

TheShodan

iTrader: (14)

For most Rochester-Lucas styled injectors, (like your Precision 1000cc) that's just the pintle moving. Normal.

m0sad

m0sad

TheShodan

iTrader: (14)

Those MSD distributors never were that good, but with an external coil, it should be ok. Not sure what to tell you at this point. You at least found the bent valves. Get a fresh set of plugs, head back to the tuner and returne completely. After that, you've got me stumped. Never had anything like that before to this extent. I'm sorry I can't be of more assistance.

m0sad

80%downtime

What are the conditions needed for the EMS to change to a VTEC profile? My understanding is that the AEM EMS has different means of choosing when to activate variable valve control (based off of TPS/RPM/MAP). Perhaps there's a slight mismatch in the conditionals that's causing that stutter.