Idle rich at hot temperature HELP (problem found)

Tsuchinoko · Post by **Tsuchinoko** » Thu Oct 15, 2009 7:35 am

My engine is idling at ~14.5 after warmed up, if i cruise with out any pull to the red line it idles always arround this afr but if pull the car it will idle arround ~12 afr witch is rich. I tried to compesate this issue by taking 3% of fuel at 75ºC intake temperature but with out sucess. I don't know if is another problem related but i could not find any thing to correct, every thing seems to be ok the cars pulls well and the afr is consistent and well tuned for my lambda target.

When this occurs the sensor values are this:
Rpm: ~850
AFR - 11.8 ~ 12.2
Map - ~270mbar
Ign - 21º
TPS - 0%
Iat - 55º~60º
Ect - 84~88º

Car: DC2 itr
Engine: B18C6
Mods: Complete exhaust system, spoon fly and clutch kit.
ECU: EDM P30 with S300

Any clue for this symptom?

fly_n · Post by **fly_n** » Thu Oct 15, 2009 9:01 am

cal & datalog of problem occuring would help,hondata are going to ask u for these anyway.

how long does it happen for?
just for a few seconds or do u have to turn motor off or something to reset the fault?

whats your O2 setup?

Tsuchinoko · Post by **Tsuchinoko** » Thu Oct 15, 2009 9:29 am

Ok I will try to post the cali and a log.

I have to wait for a while to the temp goes away and then re start.
Yes turn off and wait.

O2 i use innovate LC-1

Tsuchinoko · Post by **Tsuchinoko** » Thu Oct 15, 2009 11:21 am

Calibration

Tsuchinoko · Post by **Tsuchinoko** » Thu Oct 15, 2009 11:32 am

I can't add the log please send me a email that i can send.

Thanks

fly_n · Post by **fly_n** » Thu Oct 15, 2009 12:22 pm

maybe datalog is too big or similar,try making smaller one & post it.

u seem to have very little fuel at idle on the tables,are u using stock injectors & fuel pressure?
maybe something in actually adding some fuel to idle if stock components....

is O2 installed stock location?
try a reset on the O2,& perform a new heater & free air calibration

Tsuchinoko · Post by **Tsuchinoko** » Thu Oct 15, 2009 1:27 pm

Yes i have all stock.

I will try to do that.

Tsuchinoko · Post by **Tsuchinoko** » Thu Oct 15, 2009 2:49 pm

Still the same.
Any other clue? What the hell is coming this amount of fuel from if i don't have any correction for ading fuel?

fly_n · Post by **fly_n** » Thu Oct 15, 2009 9:12 pm

try removing that 8% throttle tip in fuel.
even load up a new basemap temporarily & see what effect that has.

its strange that u are idleing on nearly half the fuel of my B18C on your tables.
im idling on about 90 units of fuel,while u look to be in about the 50 to 60 range.
i would probably suspect the O2 readings instead.
what do your sparkplugs tell u about this supposed rich condition?

Tsuchinoko · Post by **Tsuchinoko** » Fri Oct 16, 2009 1:31 am

I tried to add fuel to arround 90 like yours and the afr went to 11,8~12,2... I already know that it would happend but a test is a test.
Anyway i notice that the issue only happend when the weather is hot, today in the morning i had a pull after a warm up and when i stop the engine was idleing very well arround ~14.5.

The issue only comes with hot intake temperatures (> ~55º) i notice that and is a fact, the thing is i don't know why.

The spark plugs are telling me that the mixture is ok a litlle bit to the rich side witch is good for me, has you can see on my target lambda tables i run a bit rich.

About my O2 sensor is new and it only have a week, the afr is reading on hondata is the same on the logworks. I don't if is 100% correct or not but the truth is the car pull very well is reading a consistent afr and i can feel is not very inacurate because when the syptom comes and the mixture goes very rich you can notice that the engine is diferent and it does a little pop from the exhaust, the same thing when it goes arround 16.xx.

Another question the IAT and ECT corrections sensor values is about ignition or fuel?

Tsuchinoko · Post by **Tsuchinoko** » Fri Oct 16, 2009 6:31 am

Is it possible to somebody from Hondata give me a email to me to send my log. I really want to know what is hapening, what give this extra fuel to the engine.

Thanks

Tsuchinoko · Post by **Tsuchinoko** » Mon Oct 19, 2009 1:21 pm

The problem was a faulty evap.

Anyway thanks for all the help.

Tsuchinoko · Post by **Tsuchinoko** » Mon Oct 19, 2009 1:22 pm

The problem was a faulty evap.

Anyway thanks for all the help.

VT-Doo · Post by **VT-Doo** » Tue Oct 20, 2009 4:25 am

What's a evap?
Do you mean your IACV?

Tsuchinoko · Post by **Tsuchinoko** » Tue Oct 20, 2009 8:44 am

No i mean the EVAP. Is the Solenoid purge control.