Rep Power: 299

perhaps this question has already been answerd but i have been unbale to locate the answer (56k takes two forevers to find anything) but my cel light came on and i think it went to limp mode. the car still runs hard but power seems to be down slightly and it runs a little off. i know it could be a number of things wrong but if anyone knows how to get the car out of limp mode without reseting the e-manage please pm me or post a link so that i can find a answer. thanks!

 
Rep Power: 299

i dont think it is a 02 sensor because it was tuned on the dyno for two hours and never came on and i have driven it like 400 miles with no trouble until now.

 
Rep Power: 387

more than likely your o2 sensor to start with but it can be a number of things. go to a local parts store and have it scanned to be for sure. DO you even have a A?F gauge or pyro gauge ?

 
Rep Power: 0

time to get a obd2 code scanner... but if it went into limp mode its probably through a p0108 which i think is the o2 sensor thing

 
Rep Power: 293

^^^ yeah you should invest with one you will probably use it quite a bit

 
Rep Power: 285

it could be fopr the secondary o2. If you dont have a cat, it will come on after some driving. The secondary O2 can take a while before it notices that there is no cat.

 
Rep Power: 387

yeap I throw a cell every few days and then it goes back off on its own.. all the time its the sensor on bank one for me

 
Rep Power: 280

To reset CEL:
Take off "+" cable from the battery for 10 mins or so, put back on and let it idle for 5 mins, then strar car again and drive around for 5 min. This will reset and "reprogramm" ecu.

 
Rep Power: 0

or with the obd2 you can erase it while you check it

 
Rep Power: 387

the easiest fastest way is to pull the ecm fuse under the hood for about 10 seconds pulling the battery loose is a PITA

 
Rep Power: 299

well if i pull the ecu fuse will it reset the e-manage?

 
Rep Power: 299

oh and i do have a a/f gauge

 
Rep Power: 0

Runnning a check valve or voltage clamp?

 
Rep Power: 299

um i want to say no b/c i only installed the fuel system, exhaust and turbo- i let the shop install the rest and unless the tsi kit came with it it is not on there ( other than the e-manage)

also if i pull the ecu fuse will it reset the e-manage?

 
Rep Power: 296

If you dont have a wideband O2 guage you may F up your engine, dude. If you are talking about one of those narrowband guages you buy that goes back and forth you wont be able to really use that to tune with. Go to your local autozone or something and they will scan it for free. It could be almost anything as far as we know. Once you know what it is you can tell us and maybe someone here will know what you will need to do to fix it. Im pretty sure pulling the battery wont reset the emanage. If you have the support tool with your emanage you can just reload your maps even if it does reset it. Or if you have the instructions it should tell you in there.

 
Rep Power: 299

i got the support tool and i wasnt going to leave the fuse out- i was just trying to reset the ecu without reseting the e-manage. but the car seemed to run fine today even with the light on. maybe it was just a hiccup but i did check all the conections today and noticed the o2 sensor that was once atached to the c.a.i is now not atached to anything and i think that may be throwing it off.

also where can i get a o2 simulator?

 
Rep Power: 327

Not to be rude but thats not an O2 sensor and if its not plugged in it will throw a CEL, and possibly make the car run poorly. You may want to seek professional assistance

 
Rep Power: 309

what is a wideband 02 gauge?

 
Rep Power: 0

i have a similar problem with the tsi kit, the code i had was high voltage, my car will cel for a sec then the car will rev (like it let go of the tranny) then go back to normal, this happens during partial boost like 1 pound on the freeway. btw i have an auto, ive been runnin like this for months.

 
Rep Power: 299

tfnaaf - what is that then and what is it used for?

 
Rep Power: 327

It's an IAT sensor, it senses the Intake Air Temp and makes adjustments for fuel/timing dependant on the temp of the intake charge. As for O2 sims the cheapest and easiest is a mechanical sensor made from Spark plug foulers( check my sig for details)

 
Rep Power: 327

Check this picture ,http://myweb.cableone.net/tfnaaf/plx%20m-500.JPG mine is on the top of the steering column. A wideband 02 uses a special o2 sensor that is more sensative and responds faster then normal o2 sensors and the controler then displays the information MUCH more accurately and faster

 
Rep Power: 299

ok this is a pic of that sensor. what should i do with it? should i stick it in the intake pipe or is there a way to bypass it?

 
Rep Power: 327

Yes, thats is the IAT sensor. The way i attached it was to use a die i THINK it was 11mm x 1.? and thread the out side of it( it worked perfect for me ) Then i got an 11mm nut. Drilled a hole about 5/16" - 8mm in the pipe close to that location and welded the nut to the out side of the pipe. Then thread the sensor in and plug it in. See picture below...

 
Rep Power: 299

thanks!!! rep points for you.
also i got the car scanned with a obd2 and seven codes came back. four where for misfire and the rest where for o2 sensors. i got the codes reset and i think the reson the misfire codes came up is because the e-manage is dealing with the timeing and such now and the stock ecu still hasnt figured that out. i will keep working with it but thanks for the help.

 
Rep Power: 327

If your getting missfire codes, do you have a wideband O2? If so keep a close eye on the Air Fuel Ratio. If the CEL comes on again get it scanned right after it comes on to make sure what it is and under what conditions it came on. If it was partial throttle it's not as huge a deal as if it was under WOT. I only had one missifre cEL and that was under light load i was running rich

 
Rep Power: 299

mine came on after i boosted real hard for about a min and returned to normal driveing.
the light poped up about five min later. it is doing allright now but i will keep a eye on it.

 
Rep Power: 309

eeek lol turbos sound like more trouble than ive heard before.

 
Rep Power: 0

keep an eye on your misfires. I thought it was a freak thing on mine so i kept a eye on it. And then bam blown head gasket.

 
Rep Power: 0

I have the same problem with the CEL being on. Because I have no CAT, a friend of mine said that it was the exhaust O2 temp sensor. I am wondering if I can hook an O2 Simulator to the sensor to correct. Any thoughts?