DI Failure Issue

[ayau]

Originally Posted by RehabJeff86

My cylinder #3 diagnosed with misfiring with DI failure and its being replaced by Scion warranty as we speak.

Do you track your car? Just trying to get an idea of how these cars fail.

[CSG Mike]

Originally Posted by track_warrior

Auto-X is light abuse as you are not wot for a 30 minute session and therefore cant generate enough heat to melt the seal. I think this issue will develop on auto-x and spirited drive cars later than on full track cars. My car had 4000 track miles when the injector failed and caused a hole in my piston. Im thinking its a simple fix but it all begins with toyobaru admitting something is wrong and offering a flash fix or DI replacement.

Detonation is detonation...

I've seen cases where it started after just an outlap on the track

[CSG Mike]

Originally Posted by Toma

Well if the problem truly is 'detonation' 100 octane fuel should easily fix it.

Incorrect. 100 octane can't compensate for a bad timing table.

[RehabJeff86]

Originally Posted by ayau

Do you track your car? Just trying to get an idea of how these cars fail.

I prefer not to disclose any further information

[ayau]

Originally Posted by RehabJeff86

I prefer not to disclose any further information

Totally understand.

Feel free to send me a PM.

[RehabJeff86]

Originally Posted by ayau

Totally understand.

Feel free to send me a PM.

Well i think u already know the answer

[Tainen]

Originally Posted by RehabJeff86

I prefer not to disclose any further information

Love your profile pic.




FYI, I can *definitely* hear the det on tip in with my headers. The louder exhaust has made it significantly more noticeable. Autocross actually made it det a TON, since you are on/off/on/off/on throttle the entire course, most of the time above 5800. I was cringing when in the passenger seat as an instructor was driving because of her really great accelerator pedal modulation was making it det pretty much constantly the entire course.


There was far, far less det on the car on the track, since it only det'd once per upshift, instead of 3 or 4 times a second x 60 seconds like it did in autocross.

[l0aded]

Can someone help me figure out my torque readings and if it relates to the DI issue?

I ran the Knock Detector app (https://play.google.com/store/apps/d...kills.kd&hl=en) and did some runs in 2nd and 3rd gear and random RPMs and had a "Possible Knock" maybe 1 out of 5 times or so. Also in the app, my throttle while fully depressing the gas to WOT was only around 83% (should be 99 or close I assume), anyone know what could be causing this? Maybe the ECU holding back for some reason?

Secondly my AFR numbers don't look so good.. Normally around 14-15 at idle which is fine but I have seen it spike to 20 occasionally running extremely lean. One specific instance I remember was when I was coming to a stop and it jumped up to 20 for a seond before returning to ~14.5 at idle. I am assuming this is not normal; can anyone chime in on what's going on? Possible leak causing the AFR to run super lean?

[feldy]

Originally Posted by l0aded

Can someone help me figure out my torque readings and if it relates to the DI issue?

I ran the Knock Detector app (https://play.google.com/store/apps/d...kills.kd&hl=en) and did some runs in 2nd and 3rd gear and random RPMs and had a "Possible Knock" maybe 1 out of 5 times or so. Also in the app, my throttle while fully depressing the gas to WOT was only around 83% (should be 99 or close I assume), anyone know what could be causing this? Maybe the ECU holding back for some reason?

Secondly my AFR numbers don't look so good.. Normally around 14-15 at idle which is fine but I have seen it spike to 20 occasionally running extremely lean. One specific instance I remember was when I was coming to a stop and it jumped up to 20 for a seond before returning to ~14.5 at idle. I am assuming this is not normal; can anyone chime in on what's going on? Possible leak causing the AFR to run super lean?

Good question. I dont have a answer for you but maybe someone out there does? I have seen the same afr numbers when doing logging before. Mainly when there was 0 load and 0 throttle postion for a moment.

I do know that at wot the throttle postion is always around 80ish percent. Not sure why they do that.

[Doborder]

Can all the folks that actually have the DI issue please let us know your car's build dates... maybe the newer ones already have this fix. So far, all of the cars I know about is was purchased in 2012 with build date in 2012. Can someone confirm or deny this?

[ft_sjo]

Originally Posted by l0aded

Can someone help me figure out my torque readings and if it relates to the DI issue?

I ran the Knock Detector app (https://play.google.com/store/apps/d...kills.kd&hl=en) and did some runs in 2nd and 3rd gear and random RPMs and had a "Possible Knock" maybe 1 out of 5 times or so. Also in the app, my throttle while fully depressing the gas to WOT was only around 83% (should be 99 or close I assume), anyone know what could be causing this? Maybe the ECU holding back for some reason?

Secondly my AFR numbers don't look so good.. Normally around 14-15 at idle which is fine but I have seen it spike to 20 occasionally running extremely lean. One specific instance I remember was when I was coming to a stop and it jumped up to 20 for a seond before returning to ~14.5 at idle. I am assuming this is not normal; can anyone chime in on what's going on? Possible leak causing the AFR to run super lean?

All of the above is perfectly normal and not a problem.

[regal]

Originally Posted by ft_sjo

All of the above is perfectly normal and not a problem.

a "Possible Knock" maybe 1 out of 5 times or so

may be normal for these cars but it certainly is a problem.

[robispec]

Originally Posted by ayau

Probably not. See this post.

http://www.ft86club.com/forums/showp...&postcount=132

and my response

http://www.ft86club.com/forums/showt...34#post1068034

again Mike drove a car on the track KNOWING that the seal had already failed. They had taken the car to the dealer and they said bring it back when it has a code... It was popping going out on the track....and once you have heard this sound you KNOW that the seal is bad. Mike knew this and drove it anyway...

[ft_sjo]

Originally Posted by regal

may be normal for these cars but it certainly is a problem.

Sometimes I wonder if you're just plain stupid, or are only interested in listening to yourself and/or whatever on Google matches your delusions? Most modern vehicles have adaptive spark strategies which constantly advance the spark angle until a knock event occurs.. KNOCK HAS TO OCCUR FOR THIS TO WORK.

End of discussion. Stop spreading FUD and paranoia.