Throwing 5 codes....Help

RallyAzn04 · Mar 12, 2009, 11:11 AM

After i installed RRM Turbo Kit,A week later i went to autozone to check my CEL an They told me....Running To Lean,Both o2 senors Bad,Crank Shaft Postioning Senor,An Mis Fire In Cylinder 4... That all sounds pretty bad,An dont know where to start first...if any1 can help Plz.....

hackish · Mar 12, 2009, 02:33 PM

The misfire code will be related to the mixture. If your mixture is severely rich it can kill the O2 sensors which can explain those codes. When you get the system too lean code that means the O2 sensor tried to add fuel until it reached +12.5% longterm fuel trim and was still trying to add more fuel.

In other words your car is running lean. Frequently this happens when you're under boost but not at wide open throttle. This is because the stock ECU does not go into open loop mode until you floor it. Be careful with this as I've seen more than one engine expire under these conditions.

If you've seen the threads about the ECU reflash I've been working on a little something to address all the problems with running a turbo kit on the ralliart.

-Michael

Don Nguyen · Mar 15, 2009, 10:02 AM

Can't help you, but that sounds possibly serious, hopefully you get your answers/help!

-Don

chad99evo · Mar 17, 2009, 01:28 AM

if properly tuned those codes can and usually are very common, even if a problem isnt actually present to my knowledge.

in my evo i throw both o2 codes, random misfire or 3rd cylinder misfire. the codes come and go from day to day. everything is built on the motor except i dont have a machined head w/ oversized valves. 35r kit, 280s, etc etc. but perhaps its differnt in the ralliart. and of course my tune is very consistant with lambda/AF ratios 100% all the way through the throttle range. i have a very smart tuner though.

IMO sounds normal and i wouldnt worry about it. but than again, i dont have a turbo'd ralliart, so get it checked out by somebody with brains, not autozone

...... i miss my 04 ralliart by the way

.......at 6:30 am i wake up for deposition because im suing the guy that ran a red light and totaled my ralliart 3 years ago. i hope all goes well with this.

and hope all goes well with you

, good luck.

.......ah crap its 2:30 am over here too..so much for getting a good nights sleep.

chad99evo · Mar 17, 2009, 01:33 AM

Quote:

Originally Posted by hackish

The misfire code will be related to the mixture. If your mixture is severely rich it can kill the O2 sensors which can explain those codes. When you get the system too lean code that means the O2 sensor tried to add fuel until it reached +12.5% longterm fuel trim and was still trying to add more fuel.

In other words your car is running lean. Frequently this happens when you're under boost but not at wide open throttle. This is because the stock ECU does not go into open loop mode until you floor it. Be careful with this as I've seen more than one engine expire under these conditions.

If you've seen the threads about the ECU reflash I've been working on a little something to address all the problems with running a turbo kit on the ralliart.

-Michael

theres your answer lol....didn't see that

.

RallyAzn04 · Mar 22, 2009, 07:28 PM

Thx Yall For the info an help! Me an My friend fixed the problem..i hope..we re-wired the piggyback to make sure all connections were Good, After that we Re-wired the o2 Sensors Cause i was only running 1 cause the down pipe was different then the stock one an the o2 sensor holes were close to the motor then the stock downpipe...so we made them longer so they would both plug in...Been running the car for a week now an no CEL!! An the car seems to be A lil faster now!! YAY lol but thanks again for the help guys!! This Site Is Awsome!!!
Will be posting pics of the car soon!!

**GearDownSon** · Apr 1, 2009, 01:22 AM

Not a big deal bud.
My car has been throwing them codes for around 2 years.
The tech at RRM says his cel stays on.