I have a Ture Air intake on my JK for a few months now and my Jeep started running rough the other day well it turns out that its running to lean I checked my oil and it smelled like almost straight gas I afraid that my rings might already be burnt up. I changed my oil hoping this might help allittle is there anyone out there that has had the same problem and is there anyone that might know how to fis the problem with out putting the stock intake back on before I have to do a rebuild thanks

 

If your oil smells like gas, then you are running rich, and fuel is getting past the rings. Too lean is when you have too much air, and not enough fuel. The EFI computer will make the proper adjustments for an air intake and exhaust change.

If you do has gas in your oil, get it into a dealer. The air intake is not the cause unless you damaged the ADS in a way that is making it dump tons of fuel into the cylinders.

 

I agree, sounds like to much fuel. Its quite possible you have an injector sticking open. I'd pull the plugs and see if any of them look fouled.

 

i pulled the plugs and they were white

 

White colored plugs is an indication of overheating which could be caused by a lean mixture.

 

The two issues mentioned don't go hand in hand so it's important to take a pretty hard look at things.

It wouldn't be at all surprising to be running lean with a CAI. Higher volume of air and just not a real good feedback loop to take care of it at the ECM. Nothing outside of a temperature sensor on the intake side and an o2 sensor on the exhaust side.

Were all the plugs checked, or just a single one?

Were any DTCs thrown?

Is the AIT sensor intact?

If that all checks and with gas in the oil pan, I'd probably spend the 30 minutes to get the stock air box re-installed and cart it off to the dealer. Could be a faulty O2 sensor and could potentially be that there was some damage from a prolonged lean condition.

 

a CAI alone won't cause your Jeep to run lean to the point where it is eating the engine. The MAF sensor located between the CAI and the intake is measuring air mass and will note the increase in volume. This is the main calculation the computer uses for fuel metering, especially as RPM increases.

 

There is no mass air flow sensor on the JK just an air intake temperature sensor or AIT. This is one of the issues with the third party programmers as this does nothing to indicate the density or volume of air passing though with CAIs. With expected results and airflow from a stock system, temperature alone can be a predictable indicator. When you fatten that up, it doesn't tell the while story.

However unlikely it is to cause an engine to eat itself, a CAI is very likely to cause a lean condition. This can be partially addressed with an up click in octane at the pump.

 

Never mind my stupidity...was thinking my GM cars for a minute

Still, a CAI alone should not cause the engine to run that lean. They just aren't that darn effective. W/out a MAF, the PCM is still using O2 sensor input, MAP readings, and incoming air temp to determine fuel requirements. All factory cars run in "closed loop", which means the O2 sensors add or subtract fuel as necessary based on the fuel burn in the exhaust. Factory setting are usually "stoich" or 14.63 to 1 at part throttle, but are ultra fat at around 11.0-11.5 to 1 at WOT. Optimal performance is 12.5 to 13.0 to 1 WOT. The factory sets the engine to run richer for warranty purposes and prevent lean conditions. Running NO air filter wouldn't change the air fuel ratio enough to push it into the "lean" range (13.5 to 1 or greater).

Anyhow, just my $0.02 If it was a common issue from a CAI....there'd be a lot of people with lean as a$$ running engines (me included).

 

My plugs certainly told me a little different and I would surprised if it ever hit 12.5 to 1 after moving around some bolt in parts on the intake and exhaust. Same O2 Sensor, same AIT and definitively running lean. Later some go arounds with Hypertech and their support and not a surprise at all to them that a motor would run lean with a CAI given the 02/AIT loop to correct things with the ECM. You simply need more information than what those two sensors provide and when the ECM makes changes it has expected results from a stock system.

Todays engines from the factory run pretty damn close to dead on and often a little toward lean. Fuel economy is a big deal for vehicle and you can look at any of them on any lot and see that they've rounded corners, reduced mirror sizes or whatever else they can to hopefully squeeze that extra mpg out of them. That's a far cry from even 10 years ago when the vehicles being sold could fit todays more popular vehicles through the back doors.

Anyway, I too doubt the original issue was caused by a CAI or any other bolt on modification but for sure these bolt ons will surpass what the ECM and sensors can deal with.