High AFR's WOT.

[JCarp90]

I want turbo :(

[ak-]

I should of updated this.
Thank Kam, MS is eventually what I'm planning on once I work the head and tidy a few other things.

So the problem kind of went away on its own. I figured out the more consistently I drive hard(high rpm, getting into boost more often), the AFR's correct themselves eventually and gets used to that driving style and stays consistent with good fuel ratios.

The more lazy I drive(always in vacuum, granny shifting), the harder it is for the AFR to adjust itself when I decide to go full-retard out of no where.

My car idles fine on warm-up @ 750 and 14.1-15, always.
Sometimes it takes a little throttle when warm for a few seconds, but it holds itself well after.

I think I need more dyno tweaking after talking with more knowledgable people. Never got the chance to do road tests with Dan after we for off the dyno.


Ill update accordingly :p

[kamotors]

NEED megasquirt. My car was either perfect in first lean in every other gear or poo rich in first and "good" not great in other gears. lets not forget the constant CEL and random stalling. Megasquirt fixed everything, Miller told me it was sensors and what not. I believe they said my ICV couldn't keep up because i couldn't raise my idle above 700 with WAR but when I switched to MS everything was perfect and I could do a nice 1500rpm cold idle on first start up and base tune. Whodwho's base tune he gave me ran 100X better than the WAR chip setup.

[Dj Buttchug]

^ I know that feel bro.

[ak-]

[Denny]

I also had problem like you are having right now. Even do they sent me a tune and I tuned it even more.... It would NEVER ever transition from PT to WOT fast It had to be stupid rich to be drivable at WOT!! I say 8-10PSI max on the stock DME and MAF/Miller setup!!

Solution.... Megasquirt! MAP instead of MAF is the key....oh and lets not forget DATALOGGING!! very very important.

Could not be happier seriously... I dont know why I did not listen to the folks in here.. I should of went MS from the start.

Very affordable (get Keith "WHODWHO" to build you one) and easy to install, support is amazing.

[ak-]

Not the answer I'm looking for

[FLG]

time for MS brodeo

Sent from my Galaxy Nexus using Tapatalk 2

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[jaywood]

time for MS brodeo

[e30trooper]

time for MS brodeo

[ak-]

in theory yes. thats exactly what can happen in specific situations. We would be able to better diagnose this if we had some data log stuff to look at.

its also already having to deal with WAY larger injectors than normal. You need to go MAP, but aside from all that theres no reason that this cant be fixed on the tune you have now.

I wish I have logging available.
Going MAP is eventually what I plan on doing way down the road. I strongly believe it can be fixed, but I really really don't think it's the tune.
Dan spent a good time fine tuning it and like I said it was perfect until I let the car sit over night.
I still think it's mechanical. There are 3 other turbo 173 cars running properly at the shop that Dan has tuned.

I'll clean out my possibly oil-fouled TPS and update Friday.

[5Toes]

Whats confusing about testing the tps?

Its a simple continuity check at full throttle and at idle.

[Dj Buttchug]

That makes somewhat sense to me yeah.
So because Motronic is a stupid 4th grader, and I drive in vacuum 85% of the time, and it gets used to that vacuum driving condition in closed loop/adjusting, is it saying "OH SHIT ADJUST FUEL DAMMIT" when I decide to go WOT all of a sudden? And then it can't keep up for those few seconds in WOT? Or it adjusts slow?

in theory yes. thats exactly what can happen in specific situations. We would be able to better diagnose this if we had some data log stuff to look at.

its also already having to deal with WAY larger injectors than normal. You need to go MAP, but aside from all that theres no reason that this cant be fixed on the tune you have now.

[ak-]

the WOT part confuses me to but it may be because the subtle changes that motronic is making are only noticeable when the engine is in very high demand.

Motronic will always try to be most efficient in closed loop. It will essentially lean the car out as much as possible (or until it reads a potentially dangerous AFR) then it will deliver just a little bit more fuel. basically it can constantly make minimal changes to obtain the best fuel consumption.

Theres a chance that after a certain period of time 3 or more drive cycles are complete and motronic will then begin to run the leaner condition injector cycle causing lean conditions. The reason its only noticeable at WOT is because thats when the engine needs the most fuel and its suddenly getting just a tad bit less.... thus the pinging/detonation/fuck my life i need to go full standalone.

I donno im just spitballin here. I could be totally wrong

That makes somewhat sense to me yeah.
So because Motronic is a stupid 4th grader, and I drive in vacuum 85% of the time, and it gets used to that vacuum driving condition in closed loop/adjusting, is it saying "OH SHIT ADJUST FUEL DAMMIT" when I decide to go WOT all of a sudden? And then it can't keep up for those few seconds in WOT? Or it adjusts slow?

[Dj Buttchug]

the WOT part confuses me to but it may be because the subtle changes that motronic is making are only noticeable when the engine is in very high demand.

Motronic will always try to be most efficient in closed loop. It will essentially lean the car out as much as possible (or until it reads a potentially dangerous AFR) then it will deliver just a little bit more fuel. basically it can constantly make minimal changes to obtain the best fuel consumption.

Theres a chance that after a certain period of time 3 or more drive cycles are complete and motronic will then begin to run the leaner condition injector cycle causing lean conditions. The reason its only noticeable at WOT is because thats when the engine needs the most fuel and its suddenly getting just a tad bit less.... thus the pinging/detonation/fuck my life i need to go full standalone.

I donno im just spitballin here. I could be totally wrong