Sounds self induced and pls do not take that the wrong way and look at the codes to start your fix.

 

I have trouble code P0171 and i have cleaned my sensor with alcohol and brake cleaner. I recently installed an oiled filter and since then i have been getting this code what can i do.

Reinstall original filter and see if the grimlins leave..

 

for the past I found if you pull the mas air flow ant clean it with brake cleaner. it does not leave a coating. unplug the bat, to 20 mins. put it back together and drive 45 mins to the computer learn how to drive. It well be hard to start and run ruff ro the first 5 mins or so.

ryan

 

p0171 i believe is system too lean. cleaning the MAF will work, but it is a temperately fix. the more you clean it, the faster it will come back until you replace the MAF sensor.

 

That's Bank 1 system lean. Air cleaner not sealed letting in to much air. Intake leak. Clogged injectors, Etc.... But my guess is the new hi flow air filter. Any engine using an ECM and OBDII is constantly learning how you drive and the condition under which you drive and it is always making adjustments and keeping a memory of these settings. Now when you installed the air cleaner the engine didn't know you did anything to the air fuel ratio and now you have a less restrictive air cleaner and your ECM is trying to adjust.
As stated..... either put the old filter back in or drive it till it learns the new ratio.
kerry

 

double check your PCV connections also!! esay to not hook back up!

 

Suggest reducing the oil quantity on the filter. Wash it, reoil it, sparingly.

 

Check, clean, and service your throttle body, pcv, and MAF. The MAF has two sensors inside and unless your looking for them, you will probably miss one because it's kind of hidden. I use electrical cleaner on the MAF but if you only have brake cleaner, that should do it. Pull the battery cable and press your brake pedal for a few minutes to reset the ECM and I would use a dry paper air filter until you can find the source of the CEL. If you continue to throw a code, pull the plugs and examine carefully, they can tell you a hell of a lot of info, but you gotta listen carefully.

 

First get rid of the "oiled filter".

 

This may be a stupid response but I used to have a 2000 Tacoma 4X4 that had a K&N fipk and I had the same problem that you describe, it got so bad that the truck would not idle and I would have to keep the rpms at 2000 all the time to keep it running. Anyway I took the throttle body apart and there is a idle sensor right at the bottom of the throttle body, it is like a magnet that opens ever so slightly for idle and then obviously more for more throttle. But getting to the point the oil from the filter had clogged up the little sensor so that is wasnt opening slowly for idle it was getting stuck shut witch was killing the motor, so I took it apart and cleaned it thouroughly and put it back together and siliconed the outside to make sure it was sealed nad had no problems from then on. I know that these trucks are much newer and way more advanced but maybe there is something like that on your truck, anyway just my 2 cents. Good luck!!!

 

If i clear the Code with a OBD II reader is that the same as unhooking the battery? Also in my original question The starting problem and the too lean code are completly unrelated it has always taken a second or 2 to start.

 

Oh going back to the original filter is nolonger an option....opps

 

Oh going back to the original filter is nolonger an option....opps

Find a used stock air cleaner box and go back to stock.

Otherwise your just going to have to llive with it.

Do a search about CCI (Cold air intakes and oiled filters) The general consensus around TS is that the STOCK system works best.

 

I think your right i will have to see if i can find a original stock setup.

 

I have heard not to use carb, alcohol, or break cleaners. Due to the fact that they will eat away at the coating on the MAF wires and ruin it. Also i was told my an ASE toyota tech. to use ONLY MAF cleaner. only $8.00 a can.

 

Attached is a link to MAF sensor cleaner sold by AutoZone for $8.00. I've used it numerous times already so a single can will last you a long long time.

CRC/Mass air flow sensor cleaner (05110) | Electrical Parts Cleaner | AutoZone.com